logo

korean english

게시판

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 1058101
156 <2/7> Exotic phases in pyrochlore iridates 2013.02.05 65305
155 <1/16> Higgs-to-diphoton rate in type II seesaw models 2013.01.11 73609
154 <12/12> lattice structure in holographic models 2012.12.12 73160
153 <12/21(금)> Theory of topological quantum phase transitions in 3D noncentrosymmetric systems 2012.12.05 121456
152 <12/21(금)> Generic quantum spin ice 2012.12.03 66630
151 <11/28> Extremal Black Holes and Holographic C-theorem 2012.11.28 96768
150 <12/3> Magnetic couplings, optical spectra, and spin-orbit exciton in 5d Mott insulator Sr2IrO4 2012.11.26 95492
149 <11/21> Cosmological viable scalar-tensor theories of gravity 2012.11.16 179417
148 <11/5> Optical spectroscopic probe on the surface state in three dimensional topological insulators 2012.10.24 69292
147 <10/24> Dung-hai Lee 교수와의 간담회 2012.10.23 67476
146 <11/22> Spin polarization of photoelectrons from a topological insulator 2012.10.22 63202
145 <10/23> Measuring Transfer Reactions with Radioactive Beams 2012.10.15 73758
144 <10/12> Kondo Effect in a Quantum-Dot-Topological-Superconductor Junction: A Numerical Renormalization Group Analysis 2012.10.08 74862
143 <10/5> Gauge fields. Past, present, future. 2012.10.05 64664
142 <10/8 (월)>물리학과 특별세미나 개최 안내 2012.10.05 85590
» <9/20> Time-reversal anomaly in Josephson effect involving Majorana fermions 2012.09.20 78060
140 <9/14> High temperature superconductivity and fluctuating stripe 2012.09.10 92189
139 <9/7> On Dark Matter and its indirect detection with box-shaped gamma-rays 2012.09.05 72530
138 <9/7(금)> Kondo Effect in Chiral Orbital Bands 2012.08.31 67748
137 <8/7> Scotch tape and spectroscopy: probing and manipulating the surface of a topological insulator 2012.07.27 86447