logo

korean english

게시판

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 1079576
427 <6/10(수) 오후4:30분> Closing in on the Axion Dark Matter hypothesis 2015.06.03 68367
426 <6/2(화)> 세미나 개최 안내 2015.06.01 62116
425 <6/3(수) 오후4:30분> The Quest for Dark Matter: Discovering Its Nature Underground? 2015.05.28 74330
424 <5/26(화)> 세미나 개최 안내 2015.05.27 64153
423 <5/27(수) 오후4:30분>Controlling phases in epitaxial transition metal oxide thin films 2015.05.21 111909
422 <5/16(토)> 세미나 개최 안내 2015.05.18 217664
421 <5/20(수) 오후4:30분> Nonequilibrium statistical physics for Brownian heat engine 2015.05.14 62986
420 <5/13(수) 오후4:30분> 내가 몰랐던 대한민국 2015.05.07 59162
419 <5/6(수) 오후4:30분> 빛의 여행 2015.04.29 62066
418 <4/25(토)> 세미나 개최 안내 2015.04.23 81000
417 <4/29(수) 오후4:30분> 양자정보 2015.04.23 60743
416 <4/24(금)> 초청세미나 개최 안내 file 2015.04.13 58316
415 <4/15(수)> 세미나 개최 안내 2015.04.09 66513
414 <4/15(수) 오후4:30분> Who is SHE? 2015.04.08 103912
413 <4/21(화)> 특별초청세미나 개최 안내 2015.04.03 82466
412 <4/8(수) 오후4:30분> 우라늄의 일생 2015.04.02 65384
411 <4/7(화)> 특별초청세미나 개최 안내 2015.04.01 76289
410 <4/1(수) 오후4:30분> 과학기술과 미디어 2015.03.26 62178
409 <3/31(화)> 초청세미나 개최 안내 2015.03.24 78182
408 <3/25(수) 오후4:30분> 슈퍼컴퓨터와 국가경쟁력 2015.03.19 61374