Field-Induced Quantum Critical Point inCeCoIn5

2002/12/31 by Johnpierre Paglione, M. A. Tanatar, D. G. Hawthorn +8 · 7 citations
Materials Science · Physics and Astronomy · #Condensed matter physics #Critical exponent #Critical field #Critical point (mathematics) #Electrical resistivity and conductivity #Fermi liquid theory #Field (mathematics) #Geometry #Iron-based superconductors research #Magnetic Properties of Alloys #Magnetic field #Magnetoresistance #Phase transition #Physics #Quantum critical point #Quantum mechanics #Quantum phase transition #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevlett.91.246405

published as Phys. Rev. Lett. 91, 246405 (2003) · 4 pages, 3 figures (published version)

openalex publication_date 2003/12/12 · arxiv created 2003/12/15 · arxiv updated 2009/11/30 · openalex created_date 2020/06/05 · openalex updated_date 2026/08/05

Abstract

The resistivity of the heavy-fermion superconductor CeCoIn₅ was measured as a function of temperature, down to 25 mK and in magnetic fields of up to 16 T applied perpendicular to the basal plane. With increasing field, we observe a suppression of the non-Fermi liquid behavior, \ensuremathρ\ensuremath∼T, and the development of a Fermi liquid state, with its characteristic \ensuremathρ=\ensuremathρ₀+AT² dependence. The field dependence of the T² coefficient shows critical behavior with an exponent of 1.37. This is evidence for a field-induced quantum critical point (QCP), occurring at a critical field which coincides, within experimental accuracy, with the superconducting critical field H_c2. We discuss the relation of this field-tuned QCP to a change in the magnetic state, seen as a change in magnetoresistance from positive to negative, at a crossover line that has a common border with the superconducting region below \ensuremath∼1 K.

Citations

• Heavy-fermion superconductivity in CeCoIn5at 2.3 K
• Magnetotransport ofCeRhIn5
• Coexistence of magnetism and superconductivity inCeRh1−xIrxIn5
• The break-up of heavy electrons at a quantum critical point
• Response of the heavy-fermion superconductor CeCoIn5to pressure: roles of dimensionality and proximity to a quantum-critical point
• Magnetotransport in nearly antiferromagnetic metals
• Spin fluctuations and high temperature superconductivity

Cited by

• From Kondo lattices to Kondo superlattices
• Andreev reflection and order parameter symmetry in heavy-fermion superconductors: the case of CeCoIn5
• Field-tuned quantum critical point inCeCoIn5near the superconducting upper critical field
• Quasi-two-dimensional Fermi surfaces of the heavy-fermion superconductorCe2PdIn8
• Coexistence of non-Fermi liquid behavior and biquadratic exchange coupling in La-substituted CeGe: Nonlinear susceptibility and DFT+DMFT study
• Field-induced quantum critical point in CeCoIn5
• Anisotropic magnetic-field response of quantum critical fluctuations in Ni-doped CeCoIn5