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 585448
472 <10/13> 물리학과 저차원 스핀계 연구팀 초청 세미나 2006.10.11 59954
471 <10/14> Applications of holographic QCD 2008.10.13 59807
470 <5/29> Nanomaterials Work at NASA-Johnson Space Center 2009.05.25 59760
469 <5/15>Black Hole Entropy Function in (Anti-)de Sitter Space-Time 2008.05.09 59703
468 <12/14> Breakup-Fusion and Knockout-Fusion Approach to Pre-Equilibrium Processes 2009.12.11 59676
467 <5/14> Synthesis of Two Dimensional Materials by Chemical vapor deposition 2014.05.07 59645
466 <6/26> Hawking radiation and divergence anomalies 2008.06.26 59640
465 <10/26> 빛으로 보는 세상 2011.10.17 59615
464 <8/17> Is Quantum Criticality a Key to Unconventional Superconductivity? 2006.08.09 59599
463 <11/6>Intel’s current 65 nm semiconductor process technology and the direction.... 2006.11.08 59593
462 <9/7> Solitons in the Higgs phase 2006.09.05 59564
461 <10/26>Dark-enrgy and Accelerating Universe(Some theoretical approaches) 2006.10.25 59548
460 <5/3> High-Speed MOSFET Technology: State-of-the-Art Strain Engineering 2006.05.02 59538
459 <11/28>Vacuum transitions and tunneling in field theory and cosmology 2006.11.28 59531
458 <9/8>Dynamics of one-dimensional electrons and exotic elementary excitations 2006.09.04 59411
457 <9/10> Nanomaterials for Biotech Applicastions 2007.09.05 59410
456 <4/14> X-ray absorption fine structure analyses on amorphous oxide films 2009.04.06 59242
455 <5/22> Computer-based Mathematical Analysis and Applications to Physics (컴퓨터 기반 수리해석과 물리학에의 응용) 2013.05.15 59219
454 <11/10>한국원전중성미자실험(RENO) 2006.11.08 59206
453 <9/26> Organic Polymers as Nuclear Radiation Sensors 2012.09.20 59181