Talk on triplet superconductors given at "Condensed Matter and Quantum Materials (CMQM 2021)".
Here’s the abstract of the other talk I gave today at “Condensed Matter and Quantum Materials (CMQM 2021)”. The slides can be viewed/downloaded using SlideShare here.
Session:
Superconductivity
Title:
“LaNiC2 and LaNiGa2: The Compelling Case for Non-unitary Triplet Pairing”
Authors:
James F Annett (1), Gábor Csire (1,2), Sudeep Kumar Ghosh (3), Martin Gradhand (1), Adrian D Hillier (4), Jorge Quintanilla (3), Tian Shang (5,6), Michael Smidman (7) Balázs Újfalussy (8) , Philip Whittlesea (3), and Huiqiu Yuan (7,9)
(1) University of Bristol (2) ICN2 (3) University of Kent (4) ISIS Facility (5) PSI (6) Universität Zürich (7) Zhejiang University (8) Hungarian Academy of Sciences (9) Nanjing University
Abstract:
There is a compelling case that non-centrosymmetric LaNiC2 and centrosymmetric LaNiGa2 belong to a new class of fully-gapped, internally-antisymmetric, non-unitary triplet (INT) superconductors. I will review the theoretical and experimental evidence [1], starting from the original observations of increased muon spin relaxation rate and symmetry-based arguments in favour of non-unitary triplet pairing and culminating in the current, quantitative, single-parameter theory [2]. I will highlight what remains unknown about these systems and point out possible future directions.
References:
[1] S. Ghosh, M. Smidman, T. Shang, J. Annett, A. Hillier, J. Quintanilla, and H. Yuan, “Recent progress on superconductors with time-reversal symmetry breaking”, Journal of Physics: Condensed Matter 33, 033001 (2021). DOI: 10.1088/1361-648X/abaa06.
[2] S. Ghosh, G. Csire, P. Whittlesea, J. Annett, M. Gradhand, and J. Quintanilla, “Quantitative theory of triplet pairing in the unconventional superconductor LaNiGa2”, Phys. Rev. B 101, 100506(R), DOI: 10.1103/PhysRevB.101.100506.
Click on the image to view/downloads the slides on SlideShare