BrainMap

Mr. Lucian Dragos Filip

Dr.

Scientific Researcher rank II - INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Researcher

Web of Science ResearcherID: X-6396-2019

Expertise & keywords

Optimization of stable multi-polarization states in ferroelectric heterostructures Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente
PN-III-P1-1.1-TE-2019-0709 2021 - 2022

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: https://infim.ro/en/project/optimization-of-stable-multi-polarization-states-in-ferroelectric-heterostructures/

Abstract:

Ferroelectric based heterostructures may hold the key to increasing storage capacity in computer systems. Non-volatile ferroelectric random access memories have been shown to have better stability and speed of read/write cycles than traditional RAM technology. However, the storage requirements of future applications are ever increasing which means that FeRAM must overcome not only the production cost of traditional RAM but also the storage capacity in order to become a viable replacement. Unfortunately, miniaturization is limited by ferroelectric properties of layers and increasing the number of stable polarization states is the only viable option. By using two or more ferroelectric layers separated by insulators, one can create more than two ferroelectric states due to polarization coupling between ferroelectric layers. The proposed project will focus on understanding the nature of the polarization coupling across the insulator layer and controlling the stability of the multiple polarization states. Such a study will be performed both through theoretical investigations and experimental fabrication of devices. The theoretical aspect will be concentrated on numerical calculations using density functional methods to investigate the ferroelectric/insulator interfaces and the stability of the polarization states. These results will be combined with thermodynamic models to obtain the polarization hysteresis characteristics that can be compared directly to the experimental reality. Structural characterization of fabricated ferroelectric/insulator/ferroelectric heterostructures will provide important clues for the interface regions which can be used to optimize the numerical calculations. The research team has been assembled in order to balance the two proposed objectives through extensive accumulated experience in both theoretical modelling and experimental fabrication and characterization.

CONTROL OF ELECTRONIC PROPERTIES IN FERROELECTRIC PEROVSKITE HETEROSTRUCTURES: FROM THEORY TO APPLICATIONS Call name:
PN-III-P4-ID-PCCF-2016-0047 2018 - 2022

Role in this project: Partner team leader

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://infim.ro/en/project/control-of-electronic-properties-in-ferroelectric-perovskite-heterostructures-from-theory-to-applications/

Abstract:

The main objective of the project is to obtain ferroelectric materials with controlled electronic properties at the same level as these properties are controlled in Si. This will be realized by hetero-valent doping, correlated with stress engineering and band gap engineering without affecting, as much as possible, the ferroelectric properties. The main objective is complex and ambitious because, up to date, there was no experimental demonstration that it possible to obtain n or/and p type conduction in epitaxial ferroelectrics. The successful achievement of this objective will open a new domain, that of ferroelectric electronics or ferrotronics, by producing electronic devices of p-n homo-junction type or junction transistors with ferroelectric materials. Two types of materials are envisaged, namely lead titanate-zirconate (PZT with tetragonal structure and a mixed bismuth ferrite (BFO) with bismuth chromit (BCO). In the first case the heterovalent doping will be studied on Pb or Zr/Ti sites with the aim to obtain n and p type conduction. The final goal is to produce a p-n homo-junction based on epitaxial PZT films. In the second case band gap engineering will be tested by varying the Fe/Cr content, and the dominant conduction mechanism will be identified, the goal being to use the material in photovoltaic applications. The activities will contain: theoretical studies regarding the relation between dopants, electronic properties and the ferroelectricity, including self-doping effects or electrostatic doping; target preparation for deposition of thin films; epitaxial growth of the film; characterization activities of the structure and physical properties. Not only classic doping in the target is envisaged but also doping during the epitaxial growth. The consortium is composed of 4 teams from three different institutions, including a number of 14 young researchers full time equivalent.

Controlling the electronic properties in heterostructures based on ferroelectric perovskites: from theory to applications Call name: P 4 - Proiecte Complexe de Cercetare de Frontieră
PN-III-P4-ID-PCCF-2016-0047 2018 - 2022

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO); INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO); INSTITUTUL NATIONAL DE CERCETARE DEZVOLTARE PENTRU TEHNOLOGII IZOTOPICE SI MOLECULARE I N C D T I M (RO); UNIVERSITATEA POLITEHNICA DIN BUCURESTI (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://infim.ro/en/project/control-of-electronic-properties-in-ferroelectric-perovskite-heterostructures-from-theory-to-applications/

Abstract:

The main objective of the project is to obtain ferroelectric materials with controlled electronic properties at the same level as this properties are controlled in Si. This will be realized by hetero-valent doping, correlated with stress engineering and band gap engineering without affecting, as much as possible, the ferroelectric properties. The main objective is complex and ambitious because, up to date, there was no experimental demonstration that it possible to obtain n or/and p type conduction in epitaxial ferroelectrics. The successful achievement of this objective will open a new domain, that of ferroelectric electronics or ferrotronics, by producing electronic devices of p-n homo-junction type or junction transistors with ferroelectric materials. Two types of materials are envisaged, namely lead titanate-zirconate (PZT with tetragonal structure and a mixed bismuth ferrite (BFO) with bismuth chromit (BCO). In the first case the heterovalent doping will be studied on Pb or Zr/Ti sites with the aim to obtain n and p type conduction. The final goal is to produce a p-n homo-junction based on epitaxial PZT films. In the second case band gap engineering will be tested by varying the Fe/Cr content, and the dominant conduction mechanism will be identified, the goal being to use the material in photovoltaic applications. The activities will contain: theoretical studies regarding the relation between dopants, electronic properties and the ferroelectricity, including self-doping effects or electrostatic doping; target preparation for deposition of thin films; epitaxial growth of the film; characterization activities of the structure and physical properties. Not only classic doping in the target is envisaged but also doping during the epitaxial growth. The consortium is composed of 4 teams from three different institutions, including a number of 14 young researchers full time equivalent.

Synergy of antimicrobial agents incorporated in durable bio-glass coatings for endosseous implants Call name: P 1 - SP 1.1 - Proiecte de cercetare pentru stimularea tinerelor echipe independente
PN-III-P1-1.1-TE-2016-1501 2018 - 2020

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://infim.ro/en/project/synerglass/

Abstract:

Nowadays, antibiotic resistance becomes an important issue; as bacterial strains resistant to all known antibiotics appear, we are entering the “post-antibiotic era”. Acute complications emerge after implant surgery, as trauma will weaken the local immune response and allow pathogens to adhere and rapidly evolve within the implantation site. Severity increases in dentistry, where one cannot achieve an oral aseptic environment during implantation.

Hence, the project targets to unveil routes towards the synergic coupled effect of antimicrobial oxide agents (i.e. Ga2O3, CuO, Fe3O4, Ag2O), with different action mechanisms, incorporated in bio-glass magnetron sputtered layers, and thereby, the development of an advanced generation of implant coatings, capable to meet the current challenging requirements of osseous implantology: mechanical durability, match of coating and metallic substrate coefficients of thermal expansion, conservation of network connectivity along with bioactivity and osseointegration ability, match of bone healing rate with coating degradation speed, and effective antimicrobial action against a wide spectrum of pathogens. This will ineluctably translate in the safe and long-lasting performance of functionalized medical devices. Solutions to i) boost and control the duration of antimicrobial effect by means of sacrificial layers, ii) eliminate costly and time consuming stages from the intricate technological chain, and iii) improve the existing in vitro testing protocols, will be also proposed. The degree of innovation comprised in project goals can enable surpassing the current knowledge boundaries in the field of implant coatings, and thus, generate premises for technological transfer to industry and local economical growth. Besides the scientific targets, the project will aim to attract valuable human resources in national research and create opportunities of continual professional formation for young researchers to expand their knowledge and skills

Field effect transistors based on new transparent heterostructures synthesized at low temperatures Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-1122 2015 - 2017

Role in this project: Key expert

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://www.infim.ro/projects/field-effect-transistors-based-new-transparent-heterostructures-synthesized-low

Abstract:

The main objective of the project is to manufacture transparent field effect transistors with superior performances, based on aluminum nitride gate dielectrics. Although aluminum nitride is a very promising material for such type of applications, its use as gate dielectric in transparent transistors is an international novelty. Therefore, this project can generate, by its implementation, a significant impact to the development of transparent electronics. The project proposal will entail complex and fluid research activities, from the synthesis of materials and their characterization in view of optimization, to the fabrication of high performing devices on both rigid and flexible substrates. In order to achieve transistors with an functional response superior to the one of the devices used currently in transparent electronics, the project team will employ a series of optimization solutions (testing new geometries, post-fabrication thermal treatments and various encapsulation solutions). Last but not least, the project will represent a great opportunity for the young project team to form a strong scientific nucleus, which, by using the complex infrastructure of the host institution, will be able to contribute to the progress of micro-nano-electronics, on both nationally and internationally level.

Next generation highly efficient LASER light sources: from micro emitters to full scale optical devices. Call name: Projects for Young Research Teams - RUTE -2014 call
PN-II-RU-TE-2014-4-2412 2015 - 2017

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA BUCURESTI

Project partners: UNIVERSITATEA BUCURESTI (RO)

Affiliation: UNIVERSITATEA BUCURESTI (RO)

Project website: http://www.unibuc.ro/n/cercetare/proiecte/fizica/NewLASERDev/

Abstract:

Nowadays, the possibility of finding and employing new materials and considering novel flexible designs for engineering compact and reliable laser sources is a highly motivating challenge. Difficulties arise in combining low building costs, "green" materials, small size devices and possible mouldable shape (for certain applications), sample specific lasing frequencies, high emission efficiency and substrate compatibility. Uncovering materials and imagining systems that can assemble all (or most) of these properties could lead to major enhancements in the field and significant expansion of potential technological applications and devices involving these particular optical amplifiers. The main objectives of the project are to design and fabricate new types of lasers by using non-ordinary materials (that have not been previously mentioned in the scientific literature as potential candidates for active media nor resonant cavity-like substituents in Laser systems) while possessing remarkable features and enhanced properties with respect to extant devices. We wish to tackle these aspects, build and characterize our novel devices by modern techniques, as both micro-scale gadgets and full size systems, in order to also bring important updates for fundamental science and try to gain knowledge of the laws governing the operating amplification mechanisms at small scale (molecular) levels.

Metal-ferroelectric interfaces: From first principles to experimental optimization Call name: Projects for Young Research Teams - TE-2012 call
PN-II-RU-TE-2012-3-0320 2013 - 2016

Role in this project: Project coordinator

Coordinating institution: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA

Project partners: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Affiliation: INSTITUTUL NATIONAL DE CERCETARE - DEZVOLTARE PENTRU FIZICA MATERIALELOR BUCURESTI RA (RO)

Project website: http://www.infim.ro/projects/metal-ferroelectric-interfaces-first-principles-experimental-optimization

Abstract:

Study of the PZT/metal interfaces using ab-initio and experimental investigations. The electronic properties of the SRO/PZT/metal samples will be investigated using a variety of methods ranging from C-V, P-V, I-V characteristics as well structural investigations. The experimental measurements will be used in conjunction with the numerical simulations in order to explain the drastic changes in the electronic properties of the MFM devices when then metal electrode is changed. The purpose of the investigations is to optimize the properties of the MFM structure for attractive memory applications.

Effect of interfaces on charge transport in ferroic/multiferroic heterostructures Call name: Complex Exploratory Research Projects - PCCE-2011 call
PN-II-ID-PCCE-2011-2-0006 2012 - 2016

Role in this project: Key expert

Coordinating institution: National Institute of Materials Physics

Project partners: National Institute of Materials Physics (RO); National Institute of Materials Physics (RO); National Institute of Materials Physics (RO); National Institute of Materials Physics (RO); National Institute of Materials Physics (RO); Alexandru Ioan Cuza University (RO)

Affiliation: National Institute of Materials Physics (RO)

Project website: http://www.infim.ro/projects/effect-interfaces-charge-transport-ferroelectricmultiferroic-heterostructures

Abstract:

The main objective of the project is to perform a detailed study of interfaces and their effect on the charge transport properties in a number of well defined artificial multiferroic structures. Charge transport is beneficial in some cases, for example in tunnel junctions, but can be detrimental in other cases, as for example devices based on magnetoelectric effect or in capacitor like structures. In all cases, at least the interfaces with the metallic electrodes are involved in charge transport, but other interfaces can be also involved if multilayer structures are used. The study will be performed on thin films and/or nanostructures, therefore a significant influence of interfaces on the electronic and ionic charge transport is expected. The start will be from simple capacitor-like structures, to elucidate the problem of electrode interfaces in the case of various ferroic oxides. Further on charge transport in relation with interfaces will be studied in mode complex, multilayer structures with possible applications in tunel junctions, diodes or field effect devices.

The project involves 6 research teams from 2 host institutions, one of which is the National Institute of Materials Physics from Bucharest-Magurele, and the other one is the Alexandru Ioan Cuza University (UAIC) from Iassy. The composition of the teams is a mixes experienced researchers with excellent track records regarding preparation, characterization and modelling of advanced multifunctional materials including oxides, and young scientists at the beginning of their carriers. Some 12 PhD thesis are expected to start during the project. The project is expected to have a major impact not only at the basic science level, reflected by publications in high ranking journals, but also at the level of applied research, as for example manipulation of charge transport through designing specific interfaces or developement of new oxide architectures for ferroelectric field effect controlled of spin currents.

New Metamaterial Classes for Applications in Optics and Photonics Call name: Exploratory Research Projects - PCE-2011 call
PN-II-ID-PCE-2011-3-1007 2012 - 2016

Role in this project: Key expert

Coordinating institution: Universitatea din Bucuresti

Project partners: Universitatea din Bucuresti (RO)

Affiliation:

Project website: http://www.unibuc.ro/n/cercetare/proiecte/fizica/PN-II-ID-PCE-2011-3-1007/index.php

Abstract:

Metamaterials (MTMs) are artificial composite materials whose electromagnetic properties are induced by an appropriate structuring of the medium at scales much smaller than the operational wavelength. For visible light, this “effective medium” requirement implies typical sizes of the artificial structures around a few tens of nanometers or less, hence setting the framework for the present project. The goal of our research project is precisely to develop a radically new generation of metamaterials, created for infrared and optical frequencies, based on the use of nano-physics, nano-optics and self-assembly of soft materials. This fabricating and assembling route will result highly innovative being tightly focused on the design of a new kind of active reconfigurable photonic systems. We propose two major Workpackages (WP) which correspond to a different set of detailed scientific and technical objectives. WP1-The general objective will be to organize, assemble and study plasmonic nanoparticles and integrate them into soft materials using different approaches, all oriented towards the possibility to create nano- and micro-structures with novel reconfigurable optical properties. WP2 – The study of loss compensation in metamaterials. A number of specified operational models and development methods, both from the theoretical and the nano-technological point of view, will be defined and optimized in order to reduce the strong losses present in the MTM systems.

Advanced Soft Systems for Applications in Optics and Materials Science Call name: Projects for Young Research Teams - TE-2010 call
PN-II-RU-TE-2010-0225 2010 - 2013

Role in this project: Key expert

Coordinating institution: UNIVERSITATEA DIN BUCURESTI

Project partners: UNIVERSITATEA DIN BUCURESTI (RO)

Affiliation: UNIVERSITATEA DIN BUCURESTI (RO)

Project website: http://www.unibuc.ro/n/cercetare/proiecte/fizica/PN-II-RU-TE-2009-225/ ; http://www.unibuc.ro/n/cercetare/proiecte/fizica/PN-II-RU-TE-2009-225/ro/

Abstract:

The project describes a multidisciplinary program whose goal is to develop and investigate a new class of advanced materials with special enhanced properties in order to exploit their unique optical, dielectrical, magnetical and structural features. The controlled design, characterization and functionalization of self-assembled soft material structures over several length scales is currently one of the most important challenges facing materials science, in order to combine their unique properties to modulate the order and the physical properties of extant systems. An initial step is to optimize each desired property via adequate formulations. By using modern holographic and lithographic techniques in parallel with original research ideas we aim for creating innovative advanced systems with special properties (and their characterization). The addressed aspects will demonstrate that the proposed subject can significantly contribute to the development of knowledge in the field through its interdisciplinary character, originality, elaboration of new experimental methods and theoretical approaches. The technological impact is further increased by significant fundamental research. Our primary objectives hinge on the importance of interdisciplinary research, as it symbiotically combines our expertise in the field of physics, chemistry and engineering.Much new physics and exciting novel scientific prospects may be uncovered by studying the wave propagation in quasi-periodic structures made out of optically-active soft materials. Therefore, we anticipate strong scientific impact from the results. Beyond the mainly scientific goals that can be realistically achieved by the end of this project, there is a longer-term motivation associated with the formation of this young, yet experienced work team corroborated with the high technological potential of this work in the field of photonics and advanced materials.

FILE DESCRIPTION	DOCUMENT
List of research grants as project coordinator or partner team leader
Significant R&D projects for enterprises, as project manager
R&D activities in enterprises
Peer-review activity for international programs/projects