korean english


Home > 게시판 > 세미나

일본 Osaka Prefecture University Yoichi Higashi박사님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁 드립니다


     1. 일시: 2015 3 16() 오후 12 – 1 

     2. 장소물리학과 2층 라운지 세미나실

     3. 초청연사: Yoichi Higashi 박사님 (Osaka Prefecture University)

     4. 제목: Robust zero-energy bound states around a pair-density-wave vortex core in locally noncentrosymmetric superconductors 

     5. Abstract: We numerically investigate the electronic structures around a vortex core in a bilayer superconducting system, with s-wave pairing, Rashba spin-orbit coupling and Zeeman magnetic field, with use of the quasiclassical Green's function method [1]. There are the Bardeen-Cooper-Schrieffer (BCS) phase and the so-called pair-density wave (PDW) phase in the temperature-magnetic field phase diagram in a bulk uniform system [2]. In the low magnetic field perpendicular to the layers, the zero energy vortex bound states in BCS phase is split by the Zeeman magnetic field. In the high magnetic field, the PDW state appears, whose sign of the order parameter is different between the layers. We find that the vortex core suddenly shrinks and the zero-energy bound states appear at the BCS-PDW transition magnetic field. We discuss the origin of this different vortex core structure between the BCS and PDW states from the relation between the vortex bound states and the superconducting gap structure in the bulk energy spectra. The strong spin-orbit coupling even in the high magnetic field stabilizes the PDW state and zero-energy vortex bound states in this state. These characteristic behaviors in the PDW state can be observed by scanning tunneling microscopy/spectroscopy.

[1] Y. Higashi et al., J. Phys.: Conf. Ser. 568, 022018 (2014).

[2] T. Yoshida et al., Phys. Rev. B 86, 134514 (2012).

번호 제목 날짜 조회 수
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 1015159
162 <10/29(수)> 창조경제와 과학기술혁신시스템 2014.10.16 61386
161 <Dec.12(Wed.)> First-principles studies of complex oxides interfaces 2018.12.05 61379
160 <3/11(Mon) 10:30 am ~ >Probing Dark Matter at LIGO and Beyond 2019.03.04 61334
159 <1/2> MYRRHA Project (EU 4세대 원전 사업) 2013.12.30 61189
158 <6/24(Fri.) 1:30pm>Emergent geometry from field theory: Wilson's renormalization group revisited 2016.06.20 61145
157 <Jan.28(Thu.)>X-ray Absorption Spectroscopy Study of Amorphous Oxide Thin Films 2021.01.27 60919
156 <Nov.22(Wed.) 4:30 PM> Dark Side of the Universe 2017.11.15 60764
155 <Nov.20(Wed.)>At the End of Space and Time: Imaging the Black Hole in M 87 2019.11.14 60759
154 <4/1(수) 오후4:30분> 과학기술과 미디어 2015.03.26 60644
153 <7/15(Fri.) 11:00> Observation of a field induced quantum spin liquid in α-RuCl3 2016.07.14 60402
152 <Nov.14(Wed.) 4:30 PM> Status and Prospects for the IceCube Neutrino Observatory 2018.11.07 60175
151 <5/6(수) 오후4:30분> 빛의 여행 2015.04.29 59944
150 <3/11(수) 오후4시:30분> 테크노-이매지네이션(Techno-imagination) 2015.03.04 59913
149 <Sep.19(Wed.) 4:30 PM> Superconducting Quantum Computing (초전도 양자컴퓨팅) 2018.09.12 59911
148 <6/2(화)> 세미나 개최 안내 2015.06.01 59671
147 <3/25(수) 오후4:30분> 슈퍼컴퓨터와 국가경쟁력 2015.03.19 59653
146 <1/16(금)> Systems biology of genetic oscillations: Application to phenotypic switches 2015.01.13 59533
145 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 59464
144 <8/1(Wed.) 4:00pm>Band Topology in Nodal Line Semimetals with Z2 Monopole Charges 2018.07.23 59437
143 <June 14(Wed.) 4:30 PM> Stellar core collapse: success or failure, and future probes 2017.06.08 59423