korean english


Home > 게시판 > 세미나

아래와 같이 세미나를 개최하오니 많이 참석해 주시기 바랍니다.


                    아       래


제목: Time-reversal anomaly in Josephson effect involving Majorana fermions

연사: 정  석  범 박사님 (UC Berkeley)

일시: 2012. 9. 20(목) 오전 11시


장소: 2nd floor, lounge room  (Bldg. #31)

초록: The Majorana surface state is a protected feature in a class of
superconductor known as 'topological superconductors'. In this paper,
we study the Josephson coupling between time-reversal invariant
topological superconductors and s-wave superconductors. The Majorana
surface states of time-reversal invariant topological superconductors
in all physical dimensions have a generic topological property which
we named as time-reversal anomaly. Due to the time-reversal anomaly,
the Josephson coupling prefers a nonzero phase difference between
topological and trivial superconductors. The nontrivial Josesphon
coupling leads to a half period Josephson oscillation for a small
enough DC voltage bias, which, however, reverts to the ordinary
Josephson oscillation under an in-plane magnetic field. This provides
an experimental signature of Majorana fermions in a time-reversal
invariant superconductor. 

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1031863
16 <11/6(Tue.) 3:00pm>The Surprising Solar Gamma-ray Emission from Cosmic-Ray Interactions 2018.11.03 47492
15 <9/24(Tue) 4:00 pm ~ > Structure Formation with Two Periods of Inflation: Beyond plain LCDM 2019.09.17 45916
14 <7/11(Wed.) 3:00pm> Traversable wormholes: two-dimensional example 2018.07.09 44954
13 [8/1(Wed.), 8/2(Thu)] Lectures on gravitational waves 2018.07.24 42321
12 <June 01(Tue.)>Frustration-induced Athermal Behaviors: Hilbert Space Fragmentation and Quantum Many-Body Scars 2021.05.24 31563
11 <Nov. 5(Fri.)>Strongly Coupled Moire Photonics 2021.11.01 29618
10 <July 14(Wed.)> B1g phonon anomaly driven by Fermi surface instability at intermediate temperature in YBa2Cu3O7−δ 2021.07.13 27902
9 <8/1(Sat.)> Recent Advances in Deep Learning 2020.07.29 27600
8 <June 23(Wed.)>Valley Polarization and Exciton Hall Effect in Transition Metal Dichalcogenides 2021.06.22 22190
7 <Aug. 6(Fru.)> Gravitationally probing dark matter (DM) microphysics 2021.08.03 21576
6 <July 21(Wed.)> Strongly Correlative Ionics 2021.07.19 17451
5 <Nov. 29(Mon.)>Exploring light-matter interactions at atomic scale using electron microscopy 2021.11.22 5051
4 <Jan. 27(Thu.)>Emulating twisted double bilayer graphene with a multiorbital optical lattice 2022.01.18 1835
3 <May. 3(Tue.)>Anomalous Hall signatures of nonsymmorphic nodal lines in the doped chromium chalcospinel CuCr2Se4 2022.04.19 1024
2 <May. 10(Tue.)>Longitudinal magnon decay in the quasi-two-dimensional antiferromagnet in Ba2FeSi2O7 2022.05.09 845
1 <July 8(Fri.)>Intertwined magnetism and charge density wave in a kagome metal 2022.06.03 433