Dr. Igor Bejenari

Institute of Electronic Engineering and Industrial Technologies, Academy of Sciences of Moldova,
3/3 Academiei St., Room 202, Kishinev, MD 2028, Moldova
Office: (+373) 22-739033

Bogoliubov Laboratory of Theoretical Physics,
Joint Institute for Nuclear Research, Dubna, Moscow region, Russia

E-mail : bejenari@lises.asm.md, igor.bejenari@fulbrightmail.org
Date of birth: June 1, 1973
Nationality: Moldova


RESEARCH INTERESTS
EDUCATION
RESEARCH EXPERIENCE
VISITING POSITIONS
TEACHING EXPERIENCE
PART TIME JOB
HONORS AND AWARDS
MEMBERSHIP
PROJECTS
PERSONAL SKILLS AND COMPETENCES
PUBLICATIONS
CONFERENCE PARTICIPATION

  
             
RESEARCH INTERESTS


Condensed matter theory:

  • electronic structure of interface and low-dimensional structures based on IV-VI semiconductors and semimetals;
  • galvanomagnetic and other magnetotransport effects;
  • photoconduction and photovoltaic effects.

    Current topics:

  • electronic structure and transport properties of graphene;
  • electric field effect;
  • thermoelectric effects
EDUCATION

Institute of Applied Physics, Academy of Sciences of Moldova
Ph.D. in Physics and Mathematics
Thesis Title: Low dimensional electron states and effects in the quantum structures on the base of IV-VI semiconductors and bismuth
September 2006
Moldova State University
M.Sc. in Physics
Thesis Title: Interface electron states in the strained quantum well on the base of narrow gap semiconductors
June 1995
RESEARCH EXPERIENCE
Senior Research Physicist
Institute of Electronic Engineering and Nanotechnologies,
Academy of Sciences of Moldova
2009 - 2010
Fulbright Visiting Scholar
Department of Electrical Engineering, University of California, Riverside
Theoretical study of the electric field effect on thermoelectric properties of bismuth telluride quantum wires, as well as electrical and optical properties of graphene. Theoretically considered electron mobility in Silicon and Poly-Silicon layers Embedded within a Caustically Hard Polycrystalline Diamond Barriers
2008 - 2009
Research Physicist
Institute of Electronic Engineering and Industrial Technologies,
Academy of Sciences of Moldova
Theoretically studied the electric field effect on thermoelectric properties of bismuth telluride wires with diameter greater than 100 nm; oscillations of electronic characteristics of bismuth nanowires in an applied uniform magnetic field; thermoelectric properties of bismuth telluride quantum wires
2006 - 2008
Researcher
Institute of Applied Physics, Academy of Sciences of Moldova
Developed the anisotropic effective mass method to calculate analytically the electronic structure and semimetal - semiconductor transition in Bi nanowires. Done the numerical and asymptotic calculation of the electronic spectrum of carriers with anisotropic effective mass in nanowires under an applied uniform magnetic field
2001 - 2006
Junior Researcher
Institute of Applied Physics, Academy of Sciences of Moldova
Theoretically considered both the magnetic field effect and the strain effect on the electronic structure of the planar heterojunctions based on the narrow gap semiconductors. Studied the magnetophotogalvanic effect in the strained planar heterojunctions
1998 - 2001
Doctoral Student
Institute of Applied Physics, Academy of Sciences of Moldova
Theoretical study of the electronic structure of strained quantum wells, superlattices and heterojunctions based on narrow gap semiconductors
1995 - 1998
VISITING POSITIONS
Research Physicist
Nanostructures and Nanoscale Phenomena Group, Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Moscow region, Russia
Theoretically studied thermoelectric properties of bismuth telluride quantum wires
April 2007 - June 2007
Visiting Fellow
Nano-Silicon Group, Department of Physics, University of Warwick, UK
Theoretically studied semimetal - semiconductor transition in Bi nanowires
March 2002 - April 2002
TEACHING EXPERIENCE
Senior Lecturer
Department of Informatics and Engineering, Free International University of Moldova
System Programming (compiler design)
Information Security (Symmetric and asymmetric cryptography)
Mathematical Analysis
2000 - 2007
PART TIME JOB

Technical Writer
ADD GRUP company, 5 Ì. Costin St, Kishinev, MD-2068, Republic of Moldova
Writes, creates, maintains, and updates user guides, white papers, design specifications, and system manuals related to electricity remote metering systems (equipment, associated software)
August 2009 - present
HONORS AND AWARDS

Fulbright Scholar Award, USA (2008)
NATO ASI grant, Romania (2005)
Municipal award for the young in domain of Science, Technique, Literature, and Arts, Moldova (2003)
Royal Society of London Scholarship, UK (Warwick University) (2002)
MEMBERSHIP
Materials Research Society (MRS), USA SPIE (2007 - present)
PROJECTS

Researcher
"Thermoelectric nanostructure materials on the base of nanowires for energy conversion microsystems" Supported by Highest Concilium of Science and Technological Development (CSSDT), project No. 07.408.02.09PA

 2007 - 2008

Researcher
"Technologies and composite nanomatrix templates of nanowire net, sensor elements of devices on their base" CSSDT project No. 0104MD02548

 2004-2006
Researcher
"Strained bismuth nanowires for thermoelectric and galvanomagnetic applications" Supported by the U.S. Civilian Research & Development Foundation/ Moldovan Research and Development Association, CRDF/ MRDA project No. MP2-3046
 2003-2005

Researcher
"Development of p-type High Thermoelectric Performance Quantum-Well Structures" Supported by the International Association for the Promotion of Cooperation with Scientists from the New Independent States (NIS) of the Former Soviet Union, INTAS project No. 01-0184

 2002-2005

Researcher
"Sensors based on semiconductor and semimetal micro-wires intended for electronic devices and tools" CSSDT project No. 01.017C

2001-2003
PERSONAL SKILLS AND COMPETENCES

Language skills:
  • Russian, native language
  • Romanian, fluently spoken and written
  • English, fluently spoken and written

    Computer skills: C++, FORTRAN, Mathematica, Mathcad, COMSOL, Origin, LaTex, MadCap Flare, HTML, PHP
PUBLICATIONS

Selected publications in per-reviewed journals
  1. I. Bejenari, V. Kantser, and A.A. Balandin. Thermoelectric properties of the electrically gated bismuth telluride nanowires.
    Phys. Rev. B 81, 075316 (2010) [14 pages]. DOI: 10.1103/PhysRevB.81.075316 Available at arXiv:0908.0624v1 [cond-mat.mes-hall]
  2. 2. I. Calizo, I. Bejenari, M. Rahman, G. Liu, A. A. Balandin. Ultraviolet Raman Spectroscopy of Single and Multi-layer Graphene, J. Appl. Phys. 106, 043509 (2009) [5 pages] DOI: 10.1063/1.3197065 Available at arXiv:0903.1922
  3. I. Bejenari, V. Kantser. Thermoelectric properties of bismuth telluride nanowires in constant relaxation time approximation.
    Phys. Rev. B 78, 115322 (2008)    . DOI: 10.1103/PhysRevB.78.115322. arXiv:0804.0323v2 [cond-mat.mes-hall]
  4. I. Bejenari, V. Kantser. An asymptotic solution of the Schrodinger equation for the elliptic wire in the magnetic field.
    J. Phys. A: Math. Theor. 41 (2008) 395304. DOI: 10.1088/1751-8113/41/39/395304. Available at arXiv:0803.0942v1 [math-ph]
  5. V.G. Kantser, I.M. Bejenari, D.F. Meglei, Radial electric field effect on thermoelectric transport properties of Bi2Te3 cylindrical nanowrie coaxial structure. Material Science and Engineering: C, vol. 26, no. 5-7, pp. 1175-1179 (2006). DOI: 10.1016/j.msec.2005.09.031
  6. I M Bejenari, V G Kantser, M Myronov, O A Mironov and D R Leadley, Anisotropic size quantization and semimetal-semiconductor phase transition in bismuth-like cylindrical nanowires, Semicond. Sci. Technol., vol. 19, no.1, pp. 106-112 (2004). DOI: 10.1088/0268-1242/19/1/018
  7. I.Bejenari, N. Malkova, V. Kantser, Effect of the Boundary Conditions on the Interface Tamm's States, Physica Status Solidi (b), vol. 223, no. 3, pp.785-792, (2001). DOI: 10.1002/1521-3951(200102)223:3<785::AID-PSSB785>3.0.CO;2-X

Selected contributed publications of Igor Bejenari:

  1. Bejenari, I., Kantser, V. and Balandin, A. Enhancement of the Thermoelectric Figure of Merit in Gated Bismuth Telluride Nanowires. In:
    Materials and Devices for Thermal-to-Electric Energy Conversion, Eds. Yang, J., Nolas, G., Koumoto, K. and Grin, Y. Materials Research Society Symposium Proceedings 1166, 1166-N05-09 (1-6), 2009.
  2. Bejenari, I. and Kantser, V. Size quantization and thermoelectric properties of bismuth telluride nanowires. Semiconductor Conference, 2008.
    CAS 2008. International 2, 233 - 236.
  3. I.M. Bejenari, Ring States. Abstracts of the International Conference "Information Technologies-2006", BiT+2006, April 11-13, 2006, Chisinau, Moldova, vol. 6, pp.74-75.
  4. I.M. Bejenari, V.G. Kantser, M. Myronov, and O.A. Mironov, Enhancement of Size Quantization Effect in Bismuth Like Cylindrical Nanowires by Carrier Anisotropy, Proc. NGS 10, May 27-31,IAP Conf. Series 2, pp.212-215 (2001)
  5. V. Kantser, I. Bejenari, S. Arapan. Interface Effects of Strained Semiconductor Heterostructure in Longitudinal Magnetic Field. IEEE Semiconductor Conference 1999. CAS'99, Proceedings. 1999 International, vol. 1, pp. 367-370. DOI: 10.1109/SMICND.1999.810539
CONFERENCE PARTICIPATION

8 talks and 6 poster presentation at 11 scientific conferences.
Updated on 9 August 2010