커뮤니티 > 콜로퀴엄
글번호
569336
일 자
17.11.03 10:46:11
조회수
257
글쓴이
물리학과
11/9 물리콜로퀴엄_Quantum Electronic Transport in Graphene Hybrid Nano

 

물리colloquium

 

 

주제 : Quantum Electronic Transport in Graphene Hybrid Nanostructures

 

발 표 요 약 :

 

  Ever since discovered, graphene has brought in high-energy relativistic quantum mechanics to low-energy condensed matter system. Exploiting its unique relativistic characters and electrostatic tunability, ballistic graphene has a great potential leading us to novel electronic optical quantum devices. When electrons tunnel p-n barriers, that is termed by Klein tunneling, they exhibit negative refraction in order to conserve their pseudo-spins. Based on this unique phenomenon, 1) Veselago’s lens was demonstrated in the graphene heterostructure of two sharp p-n barriers. 2) We also demonstrated a quantum switch based on Dirac-fermion optics, where strong angle dependence of Klein tunneling probability enabled collimators and mirrors for electrons. Through systematic measurements, we isolated the net optical contribution and extract a full set of transmission coefficient, demonstrating clear evidences of Dirac fermions’ optical characteristics. Lastly, 3) we firstly induced superconducting correlations in the quantum Hall states in the superconducting heterostructure of high quality graphene. Such heterostructures were suggested to realize emergent excitations of non-Abelian anyons, although its experimental understanding has been lacking so far due to the incompatibility between superconducting and quantum Hall phases. We will discuss this system in terms of a unique platform for realizing universal and scalable topological quantum computers.

 

연 사 : 이길호 교수 (포항공대 물리학과)

일 시 : 2017119(목요일) 오후 430

장 소 : 자연대 1호관 사이언스홀

 

전 남 대 학 교 물 리 학 과

첨부파일첨부파일:
첨부파일이 없습니다.

rss

커뮤니티 > 콜로퀴엄 게시판 목록
번호 제목 작성자 작성일 조회수 파일
공지 11/26 원격강의-융합물리콜로퀴엄 : 블랙홀, 100년의 이야기 물리학과 2020-11-20 -
100 5/17 물리콜로퀴엄-Calorimeter for the energy measurement in particle p 물리학과 2018-05-11 312 -
99 5/10 콜로퀴엄:CMS실험에서 기계 학습(Machine Learning) 방법의 활용 물리학과 2018-05-04 426 -
98 5/3일 콜로퀴엄-정희수박사(Atmospheric Pressure Plasma Science, Technology 물리학과 2018-04-20 495 파일아이콘
97 4/12-물리 콜로퀴엄: Type-II Dirac Fermions in PdTe2 물리학과 2018-04-05 496 -
96 4/05-물리 콜로퀴엄 : Highly Scalable Silicon Photonic Switches for Eff 물리학과 2018-03-30 403 -
95 3/29-물리콜로퀴엄_Quantum Walks of Neutral Atoms in Spin-dependent Opt 물리학과 2018-03-22 514 -
94 3/22-콜로퀴엄 : Van der Waals heterostructure based on two-dimension 물리학과 2018-03-16 387 -
93 3/15 물리콜로퀴엄 : 그래핀에서의 양자 홀 효과와 중시계 물리현상 물리학과 2018-03-08 484 -
92 3/8 물리콜로퀴엄 OT 및 물리학과 연구실 소개 물리학과 2018-03-08 385 -
91 2018. 1학기 융합물리콜로퀴엄1 일정 물리학과 2018-02-28 552 -
90 12/7 물리콜로퀴엄-노벨상해설강연_A Long Journey toward the Detection of Gravi 물리학과 2017-11-30 683 -
89 11/30(목) 콜로퀴엄_Looking into the Universe: Higgs Boson and Gravita 물리학과 2017-11-24 277 -
88 11/23 콜로퀴엄_대학원생 연구주제 발표 물리학과 2017-11-21 340 -
87 11/16_ 딥러닝에 기반한 인공지능과 물리학_남순건 교수 물리학과 2017-11-10 383 -
86 11/9 물리콜로퀴엄_Quantum Electronic Transport in Graphene Hybrid Nano 물리학과 2017-11-03 256 -