The scaled-invariant Planckian metal and quantum criticality in Ce1−xNdxCoIn5

Hechang Lei
(Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano Devices, Renmin University of China)

Cedomir Petrovic
(Brookhaven National Laboratory)

Chung-Hou Chung
(Natl Yang Ming Chiao Tung Univ)

The mysterious Planckian metal state, showing perfect T-linear resistivity associated with universal scattering rate, 1/τ= αk_BT/ℏ with α~1, has been observed in the normal state of various strongly correlated superconductors close to a quantum critical point. However, its microscopic origin and link to quantum criticality remains an outstanding open problem. Here, we observe quantum-critical T/B-scaling of the Planckianmetal state in resistivity and heat capacity of heavy-electron superconductor Ce_1−xNd_xCoIn₅ in magnetic fields near the edge of antiferromagnetism at the critical doping x_c ~ 0.03. We present clear experimental evidences of Kondo hybridization being quantum critical at x_c. We provide a generic microscopic mechanism to qualitatively account for this quantum critical Planckian state within the quasi-two dimensional Kondo-Heisenberg lattice model near Kondo breakdown transition. We find α is a non-universal constant and depends inversely on the square of Kondo hybridization strength.

*This work is supported by the Ministry of Science and Technology, the National Center for Theoretical Sciences of Taiwan, Republic of China. Work at BNL is supported by the Office of Basic Energy Sciences, Materials Sciences and Engineering Division, U.S. Department of Energy (DOE) (materials synthesis, thermodynamic and transport characterization)

About APS

The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.

Headquarters 1 Physics Ellipse, College Park, MD 20740-3844 (301) 209-3200
Editorial Office 100 Motor Pkwy, Suite 110, Hauppauge, NY 11788 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700

Bulletin of the American Physical Society

2024 APS March Meeting

Monday–Friday, March 4–8, 2024; Minneapolis & Virtual

Session A08: Phases and Phase Transitions in Heavy Fermion Materials

Abstract: A08.00006 : The scaled-invariant Planckian metal and quantum criticality in Ce1−xNdxCoIn5*

Presenter:

Authors:

Follow Us

Engage

My APS

Information for

About APS

Abstract: A08.00006 : The scaled-invariant Planckian metal and quantum criticality in Ce_1−xNd_xCoIn₅*