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Quantum phase transition in CeCoIn 5 : Experimental facts and theory

Journal Article · · Europhysics Letters
Abstract

The condensed-matter community is involved in a hot debate on the nature of quantum critical points (QCP) governing the low-temperature properties of heavy fermion metals. The smeared jump-like behavior revealed both in the residual resistivityand the Hall resistivityRH, along with the violation of the time invariance symmetryand the charge invariance, include the violation of quasiparticle-hole symmetry, and provide vital clues on the origin of both the non-Fermi-liquid behavior and QCP. For the first time, based on a number of important experimental data, we show that these experimental observations point out unambiguously that QCP ofis accompanied by the symmetry violation, and QCP itself is represented by the topological fermion-condensation quantum phase transition (FCQPT) connecting two Fermi surfaces of different topological charges.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Basic Energy Sciences (BES)
Sponsoring Organization:
USDOE
OSTI ID:
2424909
Journal Information:
Europhysics Letters, Journal Name: Europhysics Letters Journal Issue: 4 Vol. 143; ISSN 0295-5075
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English

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