Quantum Electronic Transport in Graphene Hybrid Nanostructures
2017.09.21 08:15
장소 | E6-2. 1st fl. #1323 |
---|---|
일시 | Sep. 22 (Fri.), 02:30 PM |
연사 | Dr. GilHo Lee / Department of Physics, POSTECH |
“Quantum Electronic Transport in Graphene Hybrid Nanostructures”
Dr. GilHo Lee / Department of Physics, POSTECH
Sep. 22 (Fri.), 02:30 PM
E6-2. 1st fl. #1323
Abstract:
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.
댓글 0
번호 | 일시 | 장소 | 연사 | 제목 |
---|---|---|---|---|
262 | May. 11 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. Nam Kim |
암페어 단위 재정의와 단전자 펌프 소자 개발
![]() |
261 | May. 11 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Kun Woo Kim |
Disordered Floquet topological insulators
![]() |
260 | Apr. 09 (Mon.), 11:00 AM | E6-2. 1st fl. #1323 | Dr. Seung-Sup B. Lee |
Doublon-holon origin of the subpeaks at the Hubbard band edges
![]() |
259 | Mar. 16 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. JinHee Kim |
산화물 다층박막에서의 다양한 물리현상
![]() |
258 | Mar. 16 (Fri.), 04:0 PM | E6-2. 1st fl. #1323 | Dr. YoungDuck Kim |
Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics
![]() |
257 | Sep. 22 (Fri.), 04:00 PM | E6-2. 1st fl. #1323 | Dr. GilHo Lee / Department of Physics, POSTECH |
Unexpected Electron-Pairing in Integer Quantum Hall Effect
![]() |
» | Sep. 22 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. GilHo Lee / Department of Physics, POSTECH |
Quantum Electronic Transport in Graphene Hybrid Nanostructures
![]() |
255 | Sep. 22 (Fri.), 01:00 PM | E6-2. 1st fl. #1323 | Dr. EunSeong Kim / Department of Physics, KAIST |
Superconductor-metal-insulator transition in thin Tantalum films
![]() |
254 | Jun. 2 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. Euyheon Hwang(황의헌) |
Quasiparticle Interference and Fourier transform scanning tunneling spectroscopy in WTe2 (Weyl semimetal)
![]() |
253 | May. 12 (Fri.), 01:30 PM | E6-2. 1st fl. #1323 | Dr. Young Kuk Kim | Topological Dirac insulator |
252 | Apr. 28 (Fri.), 02:30 PM | E6-2. 1st fl. #1323 | Dr. JeongYoung Park Graduate School of EEWS, KAIST | Hot electron generation at surfaces and its impact to catalysis and renewable energy conversion |
251 | Oct. 18 (Tue.), 3PM | E6-2. 1st fl. #1323 | Dr. JunHo Suh, Korea Research Institute of Standards and Science | “Hybrid quantum systems with mechanical oscillators” |
250 | Apr. 12 (Tue.), 4 PM | E6-2. 1st fl. #1323 | Dr. Jeehoon Kim, POSTECH | Confinement of Superconducting Vortices in Magnetic Force Microscopy |
249 | Apr. 5 (Tue.), 4PM | E6-2. 1st fl. #1322 | Dr. Ara Go, Columbia University | A new impurity solver for multi-orbital systems: adaptive truncation of the Hilbert space |
248 | 2015/09/07, 3PM | E6-2. 1st fl. #1318 | Dr. Jasbinder Sanghera (U.S. Naval Research Laboratory (NRL)) | Advanced Optical Materials and Devices at NRL |
247 | 4pm, Sep. 21 (Wed. | E6-2. #2502(2nd fl.) | Dr. Henrik Johannesson , University of Gothenburg (Sweden) and Beijing Computational Science Research Center (China) | Entanglement probe of two-impurity Kondo physics |
246 | Sep. 29 (Thu), 4:00 PM | E6-2. #2501(2nd fl.) | Dr. Minu Kim, Institute for Basic Science, Seoul National University | Exploring the phase diagram of BaBiO3: epic voyage of just another bad trip? |
245 | Nov. 10th(Thu) 4 p.m. | E6-2. #1323(1st fl.) | Prof. Min Seok Jang, Electrical Engineering, KAIST | Low Dimensional Active Plasmonics and Electron Optics in Graphene |
244 | Nov. 04 (Fri), 3:00 PM | E6-2. #1323(1st fl.) | Dr. Dohun Kim, Department of Physics and Astronomy, SNU | Quantum information experiments using few electron spins in semiconductors |
243 | Nov. 04 (Fri), 1:30 PM | E6-2. #1323(1st fl.) | Dr. Jonghyun Song, Department of Physics, Chungnam National University | Exotic phenomena at oxide LaAlO3/SrTiO3 hetero-interface and their applications |