Bulletin of the American Physical Society
APS March Meeting 2023
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session M37: Recent Developments in the Theory of Superconductivity
8:00 AM–11:00 AM,
Wednesday, March 8, 2023
Room: Room 233
Sponsoring Unit: DCMP
Chair: Hung-Yu Yang, University of California, Los Angeles
Abstract: M37.00004 : Quantum Critical Metals: From Loss of Quasiparticles to High-Tc Superconductivity*
9:48 AM–10:24 AM
In this talk, I will confront some of these issues from the vantage point of heavy fermion metals, which represent a prototype family for quantum critical metals and strange-metal phenomena. I will describe the notion of Kondo destruction  and how it leads to a change of the Fermi surface from “large” to “small” across the quantum critical point, a loss of quasiparticles everywhere on the Fermi surface at the quantum critical point, and a dynamical Planckian scaling in various properties including the charge responses . I will then present results showing that such a strange-metal state drives unconventional superconductivity with high-Tc: the transition temperature Tc reaches a few percent of the effective Fermi temperature .
Connections with other correlated systems – including the cuprates, moir structures and in particular frustrated bulk systems with topological “flat bands”  -- will be briefly discussed.
In collaboration with A. Cai, L. Chen, L. Y. Chen, K. Grube, H. Hu, K. Ingersent, A. Kandala, S. Kirchner, J. Kono, X. Li, C.-C. Liu, D. Natelson, E. M. Nica, J. Pixley, S. Paschen, L. Prochaska, C. Setty, F. Steglich, S. Sur, J. D. Thompson, H. von Lhneysen, Y. Wang, S. Wirth, F. Xie, R. Yu and J.-X. Zhu.
*Supported by the NSF (DMR-2220603), AFOSR (FA9550-21-1-0356) and Robert A. Welch Foundation (C-1411).
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