korean english


Home > 게시판 > 세미나

양자물질초전도체창의연구소에서 Huazhong University of Science and Technology의 Yongkang Liu  교수님을 초청하여 아래와 같이 세미나를 개최합니다.

학과 구성원 여러분의 많은 참석을 부탁드립니다.


Date/time: 4:00 pm, Oct 22nd, 2019

Place: 7th Floor of Samsung Library

Speaker: Prof. Yongkang Luo (Huazhong University of Science and Technology)

Title: To p or not to p? O NMR of Sr2RuO4 under strain


Abstract:  Sr2RuO4 stands for one of the most fascinating unconventional superconductors. Although it shares the same crystal structure with 214 cuprates, the Tc is much lower. At its early stage since its discovery, theorists predicted a chiral p-wave order parameter d=z ̂(kx+iky). Experimental evidence for such chiral-p wave came from both unchanged spin susceptibility across Tc and time-reversal symmetry breaking at superconducting state. However, there also accumulated other evidence against it. Recently, scientists at MPI Dresden found a strong Tc peak under uniaxial strain, which is consistent with approaching a γ Fermi sheet van-Hove singularity. The absence of Tc cusp near zero strain suggested that a simple chiral p-wave is unlikely. Bulk and local experimental probe is necessary to elucidate this issue. In this talk, I will present our recent 17O NMR measurements of Sr2RuO4 under strain in both normal and superconducting states. Pronounced drops across Tc in Knight shifts are observed at both zero and vHs strains. These results, although need a better understanding, seem to exclude chiral p-wave as the most promising candidate.

[1] Y. Luo et al, Phys. Rev. X 9, 021044 (2019).
[2] A. Pustogow*, Y. Luo* et al, Nature 574, 72 (2019).

번호 제목 날짜 조회 수
공지 2022학년도 1학기 콜로퀴움 일정 2022.01.10 3140
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 815389
568 <Oct. 18(Wed.) 4:30 PM> AlGaN/GaN HEMT 센서플랫폼 (KANCSensGaNTM) 기술 소개 file 2017.10.11 43460
567 <8/21(Mon.)10:30>Non-Gaussianity as a Particle Detector 2017.08.17 43475
566 <May.22(Wed.)> Introduction to exotic quantum states in solids 2019.05.15 43498
565 <Oct. 11(Wed.) 4:30 PM> Graphene Membrane for Imaging Molecular Assembly and Dynamics 2017.09.27 43511
564 <2/8(Fri) 11:0 am ~ >Intertwined states in the pure and Nd-doped heavy fermion superconductor CeCoIn5 2019.02.08 43793
563 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 43823
562 <11/23(Fri.) 11:00am>Barrier-bound States in Flat-band Systems 2018.11.19 44352
561 <May.9(Wed.) 4:30 PM> "How gold was produced in the universe?" 2018.05.02 44378
560 <9/17(Tue) 4:00 pm ~ >Dynamics of multiple-Q spin textures and its effect on electronic state 2019.09.10 44380
559 <April.4(Wed.) 4:30 PM>From Static to Dynamic Multiferroics 2018.03.29 44662
558 <Mar.20(Wed.)> Connecting Thermoelectricity and Superconductivity by Pressure Bridge 2019.03.13 44700
557 <8/2(Thu.) 2:00pm>Status of multifractional theories 2018.07.24 44702
556 <3/2(Fri.)11:00>Evolving magnetic interactions near a Kondo breakdown 2018.02.27 45104
555 <Dec.13(Wed.) 4:30 PM>기본에 충실하고 새로움에 도전한다 - 자율주행자동차의 핵심 기술들 – 2017.12.07 45130
554 <4/5(Wed.) 18:00pm> 저에너지 가속기의 활용 2017.04.05 45297
553 <6/11(Mon.)3:30pm> Spontaneous Leptogenesis in Continuum-Clockwork Axion Models 2018.06.08 45407
552 <12/6(Fri.)>topological phase transitions in Kitaev quantum spin liquids. 2019.12.04 45464
551 <5/16(Thu.) 14:00 ~ >The Chiral anomaly without Landau levels 2019.05.08 45586
» <10/22(Tue.)>To p or not to p? – 17O NMR of Sr2RuO4 under strain file 2019.10.17 45900
549 <June 7(Wed.) 4:30 PM> 물리학으로 보는 인간과 사회 2017.05.31 45937