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 2020학년도 2학기 콜로퀴움 일정 2020.07.16 25061
공지 <12/8(Thu.) 11:00am>노벨상 소개 강연 - 2016년 노벨 물리학상: 위상 응집 물리의 탄생 2016.11.28 558743
610 <Nov.20(Wed.)>At the End of Space and Time: Imaging the Black Hole in M 87 2019.11.14 18555
609 <Nov.13(Wed.)>The Science of Quark-Gluon Plasma 2019.11.06 18267
608 <Oct.30(Wed.)> 왼손과 오른손, 기본 입자와 끈 2019.10.24 19696
» <10/22(Tue.)>To p or not to p? – 17O NMR of Sr2RuO4 under strain file 2019.10.17 21707
606 <Oct.16(Wed.)> 솟구치는 초고에너지 입자의 미스테리 2019.10.10 23682
605 <10/1(Tue.) Mini-Workshop on BSM Physics with Neutrino Detectors 2019.09.30 20373
604 <Oct.2(Wed.)> Fundamental physics with high-energy atmospheric and cosmic neutrinos today and in the future 2019.09.26 22567
603 <9/26(Thu.) 4:30 pm ~ > Neutrino Physics and Dark Matter search in IBS 2019.09.24 21881
602 <9/24(Tue) 4:00 pm ~ > Structure Formation with Two Periods of Inflation: Beyond plain LCDM 2019.09.17 21401
601 <Sept.18(Wed.)> Rare-earth: versatility and capability 2019.09.16 23778
600 <9/17(Tue) 4:00 pm ~ >Dynamics of multiple-Q spin textures and its effect on electronic state 2019.09.10 22755
599 <Sept.11(Wed.)> Fantastic physics and materials, how to find them? 2019.09.06 24845
598 <9/2(Mon) 15:00 ~ >Status of the KM3NeT Deep Sea Neutrino Telescope 2019.08.26 23437
597 <8/30(Fri) 16:00 ~ >Structures of light neutron-rich nuclei, 17,19C 2019.08.22 22634
596 <8/26(Mon) 14:00 ~ >Constructing viable models of bouncing scenarios 2019.08.20 22897
595 <8/19(Mon) 13:30 ~ >Detection of cosmic rays in the PeV to EeV energy range file 2019.08.16 23150
594 <8/14(Wed.)>3D-strain induced superconductivity in La2CuO4+δ using a simple vertically aligned nanocomposite approach 2019.08.13 24574
593 <8/19(Mon) 14:00 ~ >Exploring topological matter in an atomic quantum simulator file 2019.07.26 24533
592 2019학년도 2학기 콜로퀴움 일정 2019.07.17 383072
591 <June.12(Wed.)> Ribocomputing: Cellular Logic Computation using RNA Devices file 2019.06.07 27277