1. 제 목 : Graphene
2. 발 표 자 : Ze Don Kvon (Prof. Novosibirsk State University)
3. 일 시 : 2009년 9월 14일(월) 11 : 00 - 13 : 00
4. 장 소 : 공대11호관 103호
5. 초청교수 : 이 정 희 교수
6. 강사약력 :
(학 력)
1973 M.S. Novosibirsk State University, Physics Department
1980 Ph.D. Institute of Semiconductor Physics, Novosibirsk
(경 력)
1995-현재 Head of Laboratory for Physics and Technology of A3B5
semiconductor in Institute of Semiconductor Physics,
Professorof Novosibirsk State University, Physics
Department, Novosibirsk, Russia
7. 내용요약 :
The review of the most popular area of contemporary condense matter physics – graphene researches – is given. For instance, about 1,500 scientific papers on graphene were published in 2008 alone. Graphene is the first realization of two-dimensional crystal, i.e. it is really one atomic carbon layer. On the first glance, it is really surprising fact because there is the strong theoretical evidence forbidding the existence of 2D crystal. In the talk the atomic structure of the graphene and other carbon modifications are discussed. It is shown that a real 2D crystal can be stabilized by substrate or by ripple structure. Then the different technologies of the getting of graphene are described.
The lattice of graphene is honeycomb-like one. Just this lattice symmetry creates very incredible energy spectrum of quasiparticle excitations in graphene. Electron phenomena in graphene are described by Dirac-like equation. This feature of graphene energy spectrum allows to mimic a relativistic quantum phenomena in a benchtop experiment without any accelerator because we have massless fermions moving with a speed vF, which is 300 times smaller than the speed of light c . So many electronic properties of graphene are determined by negatively and positively charged electron-and hole-like massless quasiparticles.
It leads to interesting features in quantum macroscopic phenomena such as: anomalous integral quantum Hall effect, complete suppression of a weak localization, Klein tunneling and so on.
In the final part of the talk different possible applications of graphene (single-electron and HEMT transistors, sensors, nano-electromechanical systems) are considered.
※ 주최 : BK21 정보기술연구인력양성사업단, 전자전기컴퓨터학부
◀ 문의처 : BK21정보기술연구인력양성사업단 ☎ 950-6613 ▶
|
