Dynamical Scaling and Planckian Dissipation Due to Heavy-Fermion Quantum Criticality

被引：0

作者：

Gleis, Andreas ^{[1
,2
]}

Lee, Seung-Sup B. ^{[1
,3
,4
,5
]}

Kotliar, Gabriel ^{[2
,6
]}

Von Delft, Jan ^{[1
]}

机构：

[1] Arnold Sommerfeld Center for Theoretical Physics, Center for NanoScience, Munich Center for Quantum Science and Technology, Ludwig-Maximilians-Universität München, Munich,80333, Germany

[2] Department of Physics and Astronomy, Rutgers University, Piscataway,NJ,08854, United States

[3] Department of Physics and Astronomy, Seoul National University, Seoul,08826, Korea, Republic of

[4] Center for Theoretical Physics, Seoul National University, Seoul,08826, Korea, Republic of

[5] Institute for Data Innovation in Science, Seoul National University, Seoul,08826, Korea, Republic of

[6] Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton,NY,11973, United States

来源：

Physical Review Letters | 2025年 / 134卷 / 10期

基金：

新加坡国家研究基金会; 美国国家科学基金会;

关键词：

Cesium alloys - Cobalt alloys - Magnetic susceptibility - Optical depth - Quantum optics;

D O I：

10.1103/PhysRevLett.134.106501

中图分类号：

学科分类号：

摘要：

We study dynamical scaling associated with a Kondo-breakdown quantum-critical point (KB QCP) of the periodic Anderson model, treated by two-site cellular dynamical mean-field theory (2CDMFT). In the quantum-critical region, the dynamical staggered-spin susceptibility exhibits ω/T scaling. We propose a scaling ansatz that describes this behavior and reveals Planckian dissipation for the longest-lived excitations. The current susceptibility follows the same scaling, leading to strange-metal behavior for the optical conductivity and resistivity. Importantly, this behavior is driven by strong short-ranged vertex contributions, not single-particle decay. This suggests that the KB QCP described by 2CDMFT is a novel intrinsic (i.e., disorder-free) strange-metal fixed point. Our results for the optical conductivity match experimental observations on YbRh2Si2 and CeCoIn5. © 2025 authors. Published by the American Physical Society.

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