Quantum Electrical Transport in Topological Insulator Nanowires
2016.08.29 21:06
| 장소 | E6-2(1st fl) #1323 |
|---|---|
| 일시 | Sep. 02(Fri) 4:00 PM |
| 연사 | Dr. Yong-Joo Doh, Department of Physics and Photon Science, GIST |
Quantum Electrical Transport in Topological Insulator Nanowires
Sep. 02(Fri) 4:00 PM, E6-2(1st fl) #1323
Dr. Yong-Joo Doh, Department of Physics and Photon Science, GIST
Abstract:
Single-crystalline nanostructures of β-Ag2Se and Bi2Se3, three-dimensional(3D) topological insulators (TIs), were synthesized using the chemical vapor transport method. The topological surface states were verified by measuring electronic transport properties such as the weak antilocalization effect, Aharonov-Bohm oscillations, and Shubnikov-de Haas oscillations.[1,2] The band inversion in β-Ag2Se is attributed to a strong spin-orbit coupling and Ag-Se bonding hybridization. The superconducting junctions of β-Ag2Se nanostructures were also made using superconducting Al electrodes.[3] Very large supercurrent in the junction enables us to observe the macroscopic quantum tunneling behavior in the narrow junction limit, which is in contrary to the PbS-nanowire-based superconducting junctions[4]. Our observations would provide new meaningful information about 3D TIs, which could be useful for spintronics and superconducting quantum information devices applications.
1. J. Kim, A. Hwang, S.-H. Lee, S.-H. Jhi, S. Lee, Y. C. Park, S.-I Kim, H.-S. Kim, Y.-J. Doh*, J. Kim*, B. Kim*, ACS Nano (2016) 10, 3936.
2. H.-S. Kim, N.-H. Kim, Y. Yang, X. Peng, D. Yu, Y.-J. Doh*, (in preparation)
3. J. Kim, B.-K. Kim, H.-S. Kim, B. Kim*, Y.-J. Doh*, (in preparation).
4. B.-K. Kim, H.-S. Kim, Y. Yang, X. Peng, D. Yu, Y.-J. Doh*, ArXiv:1607.07151 (submitted).
Contact: Sung Jae Cho, Physics Dept., (sungjae.cho@kaist.ac.kr)
댓글 0
| 번호 | 일시 | 장소 | 연사 | 제목 |
|---|---|---|---|---|
| 공지 | 2019/09/18 - 12/5 | Seminar Room #1323 | Prof. David Schuster and etc. | Fall 2019: Physics Seminar Serises |
| 공지 | 2019/09/02 - 12/09 | Seminar Room 1501 | 이호성 박사 (한국표준과학연구원) and etc. | Fall 2019: Physics Colloquium |
| » | Sep. 02(Fri) 4:00 PM | E6-2(1st fl) #1323 | Dr. Yong-Joo Doh, Department of Physics and Photon Science, GIST | Quantum Electrical Transport in Topological Insulator Nanowires |
| 171 | Sep. 02(Fri) 2:30 PM | E6-2(1st fl.), #1323 | Dr. Yong-Hyun Kim,Graduate School of Nanoscience and Technology, KAIST | Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction |
| 170 | Jun 28, 14:00 | E6-2, #1322 | Dr. Bongjae Kim, Dr. Sooran Kim, Dr. Jeongwoon Hwang |
1st Research-exchange meeting of computational material physics
 |
| 169 | July 31(Wed.)/ 16:00 | E6-2, #1323 | Dr. Ivan Borzenets |
Features of ballistic superconducting graphene
|
| 168 | July 25(Thur.),4:00PM | E6-2, #1323 | Prof.Bohm-Jung Yang |
Band topology of twisted bilayer graphene
|
| 167 | Jun 24 (Mon) 11:00 | E6-2, #1323 | Dr. Henning Schomerus |
Topological photonic anomalies
|
| 166 | 2016/09/29-12/13 | E6-2, #1323 | Sangyoon Han 외 |
2016 Fall, Physics Seminar Serises
|
| 165 | 2016/1/26, 2PM | E6-2, #1323 | Dr. Sergei V. Kalinin (Center for Nanophase Materials Sciences, Oak Ridge National Laboratory) | Electrochemistry on Nano- and Atomic Levels: Scanning Probe Microscopy Meets Deep Data |
| 164 | 2016/1/11, 4PM | E6-2, #1323 | Dr. B.J.Kim (Max Planck Institute for Solid State Research) | Mott Physics in the Strong Spin-Orbit Coupling Regime |
| 163 | 2015/12/11, 3:45PM | E6-2, #1323 | Dr. Ji Hun Sim (POSTECH) | Dynamical mean field theory studies on heavy fermion system |
| 162 | 2015/12/11, 1:30PM | E6-2, #1323 | Dr. KwangYong Choi (Chung-Ang University) | Quantum spin liquid in the 1/3 depleted triangular lattice Ba3(Ru1-xIrx)Ti2O9 |
| 161 | 2015/12/09, 2PM | E6-2, #1323 | Arjun G. Yodh (University of Pennsylvania) | SWELLABLE COLLOIDAL PARTICLES ARE SWELL |
| 160 | 2015/12/03, 4PM | E6-2, #1323 | Dr. Sang-Yun Lee (3rd institute of Physics, University of Stuttgart, Germany) | Hybrid solid state spin qubits in wide bandgap semiconductors |
| 159 | 2015/12/02, 4PM | E6-2, #1323 | Dr. Dae-Jeong Kim (Dept. of Physics and Astronomy, University of California, Irvine) | Samarium Hexaboride: Is it a Topological insulator? |
| 158 | 2015/12/01, 4PM | E6-2, #1323 | Dr. Yeong Kwan Kim(Lawrence Berkeley National Laboratory, USA) | Introducing extra dimensions to spectroscopic studies of advanced quantum materials |
| 157 | 2015/11/28, 10AM | E6-2, #1323 | Dr. Suyong Jung (Korea Research Institute of Standards and Science) | Electron Tunneling Spectroscopy of Single and Bilayer Graphene with Hexagonal Boron Nitride as Tunneling Barrier |
| 156 | 2015/11/23, 1:30PM | E6-2, #1323 | Dr. Michael Park (Stanford University) | What's Beyond the Standard Model? Lessons from Run I and what might come in Run II |
| 155 | 2015/11/19, 4PM | E6-2, #1323 | Dr. Daesu Lee (University of Wisconsin-Madison) | Emergent Collective Phenomena and Functions at Reduced Dimensions |
| 154 | 2015/11/24, 4PM | E6-2, #1323 | Dr. Kab-Jin Kim (Institute for Chemical Research, Kyoto University, Japan) | Topology-based understanding of spin dynamics in inhomogeneously magnetized systems |
| 153 | 2015/11/10, 4PM | E6-2, #1323 | Dr. Woosuk Bang (Physics division, Los Alamos National Laboratory) | Rapid heating of matter using high power lasers |