visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-09-02 16:00 
일시 Sep. 02(Fri) 4:00 PM 
장소 E6-2(1st fl) #1323 
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)

 

번호 날짜 장소 제목
공지 2022-10-24 16:00  E6 #1501(공동강의실)  Physics Colloquim(Fall 2022)
공지 2022-09-21 10:30  E6-1 #1501  [Update 세미나 영상] Distinguished Lecture 'The Magic of Moiré Quantum Matter' Prof. Pablo Jarillo-Herrero(Department of Physics, MIT)
공지 2022-10-28 11:00  E6-2 #1323  [Update 세미나영상] (응집물리 세미나) Machine-Learning-Guided Prediction models and Materials discovery for high Tc cuprates
공지 2022-10-07 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Competing orders in a vanadium-based kagome metal monolayer
공지 2022-09-23 11:00  E6-2 #1323  [Update 세미나 영상] (응집물리 세미나) Steady Floquet-Andreev states in graphene Josephson junctions
공지 2022-09-22 11:00  E6-1 #1323  2022 가을학기 응집물리 및 광학 세미나 전체 일정
213 2016-11-18 10:30  #5318(5th fl.)  Non-equilibrium many-body spin dynamics in diamond
212 2016-10-27 16:00  #1323(E6-2)  Terahertz Metal Optics
211 2019-06-28 13:30  #1323, E6-2  Magnetic domains and domain wall conduction in pyrochlore iridate thin films and heterostructures file
210 2016-04-08 13:30  E6-2. 1st fl. #1501  Theoretical Overview of Iron-based superconductors and its future
209 2017-09-26 11:00  #1323 (E6-2. 1st fl.)  Time-resolved ARPES study of Dirac and topological materials
208 2019-11-01 14:30  E6-2. 1st fl. #1323  Squeezing the best out of 2D materials file
207 2019-04-19 14:30  E6-2. 1st fl. #1323  A family of finite-temperature electronic phase transitions in graphene multilayers file
206 2015-11-06 16:30  E6-2, #5318  Topological Dirac line nodes in centrosymmetric semimetals
205 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
204 2018-03-16 16:00  E6-2. 1st fl. #1323  Van der Waals Heterostructures from Quantum Transport to Ultrafast Optoelectronics file
203 2022-08-09 14:00  KI building (E4), Lecture Room Red (B501)  Quantum biology in fluorescent protein: a new model system to study quantum effects in biology file
202 2016-05-13 13:30  E6. #1501(1st fl.)  Aperiodic crystals in low dimensions
201 2018-04-11 16:00  #1323 (E6-2, 1st fl.)  Non-Gaussian states of multimode light generated via hybrid quantum information processing file
200 2017-05-12 13:30  E6-2. 1st fl. #1323  Topological Dirac insulator
199 2022-05-13 16:00  자연과학동(E6-2) 1st fl. #1323  High-fidelity iToffoli gate for fixed-frequency superconducting qubits file
198 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
197 2018-04-11 13:30  #1323 (E6-2, 1st fl.)  Probing 3D Structure and Physical Properties of Materials at the Single-Atom Level file
196 2018-10-15 16:00  #1323, E6-2  Universal properties of macroscopic current-carrying systems file
» 2016-09-02 16:00  E6-2(1st fl) #1323  Quantum Electrical Transport in Topological Insulator Nanowires
194 2016-09-02 14:30  E6-2(1st fl.), #1323  Nanoscale Thermal Physics: Seebeck Effect and Nanoscale Friction