In-plane angular dependence of the upper critical field in CeCoIn5

Franziska Weickert; Philipp Gegenwart; Hyekyung Won; David Parker; Kazumi Maki

doi:10.1103/PhysRevB.74.134511

In-plane angular dependence of the upper critical field in CeCoIn5

Franziska Weickert, Philipp Gegenwart, Hyekyung Won, David Parker, Kazumi Maki

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The tetragonal CeCoIn5 is an unconventional d -wave heavy-fermion superconductor with Tc =2.3 K. Strong Pauli limiting causes a first-order superconducting transition for fields close to Hc2 (0) and evidence for a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been found at low temperatures. Here, we present a study of the in-plane angular dependence of the upper critical field. At T=0.1 K a fourfold oscillation of 1.2% amplitude with maxima along the [100] direction is observed. This points toward a d x2 - y2 order-parameter symmetry. The data are compared with theoretical calculations including the FFLO state and a tiny anisotropy of the g factor.

Original language	English
Article number	134511
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	74
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.74.134511
State	Published - 2006
Externally published	Yes

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10.1103/PhysRevB.74.134511

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title = "In-plane angular dependence of the upper critical field in CeCoIn5",

abstract = "The tetragonal CeCoIn5 is an unconventional d -wave heavy-fermion superconductor with Tc =2.3 K. Strong Pauli limiting causes a first-order superconducting transition for fields close to Hc2 (0) and evidence for a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been found at low temperatures. Here, we present a study of the in-plane angular dependence of the upper critical field. At T=0.1 K a fourfold oscillation of 1.2\% amplitude with maxima along the [100] direction is observed. This points toward a d x2 - y2 order-parameter symmetry. The data are compared with theoretical calculations including the FFLO state and a tiny anisotropy of the g factor.",

author = "Franziska Weickert and Philipp Gegenwart and Hyekyung Won and David Parker and Kazumi Maki",

year = "2006",

doi = "10.1103/PhysRevB.74.134511",

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T1 - In-plane angular dependence of the upper critical field in CeCoIn5

AU - Weickert, Franziska

AU - Gegenwart, Philipp

AU - Won, Hyekyung

AU - Parker, David

AU - Maki, Kazumi

PY - 2006

Y1 - 2006

N2 - The tetragonal CeCoIn5 is an unconventional d -wave heavy-fermion superconductor with Tc =2.3 K. Strong Pauli limiting causes a first-order superconducting transition for fields close to Hc2 (0) and evidence for a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been found at low temperatures. Here, we present a study of the in-plane angular dependence of the upper critical field. At T=0.1 K a fourfold oscillation of 1.2% amplitude with maxima along the [100] direction is observed. This points toward a d x2 - y2 order-parameter symmetry. The data are compared with theoretical calculations including the FFLO state and a tiny anisotropy of the g factor.

AB - The tetragonal CeCoIn5 is an unconventional d -wave heavy-fermion superconductor with Tc =2.3 K. Strong Pauli limiting causes a first-order superconducting transition for fields close to Hc2 (0) and evidence for a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state has been found at low temperatures. Here, we present a study of the in-plane angular dependence of the upper critical field. At T=0.1 K a fourfold oscillation of 1.2% amplitude with maxima along the [100] direction is observed. This points toward a d x2 - y2 order-parameter symmetry. The data are compared with theoretical calculations including the FFLO state and a tiny anisotropy of the g factor.

UR - https://www.scopus.com/pages/publications/33750218356

U2 - 10.1103/PhysRevB.74.134511

DO - 10.1103/PhysRevB.74.134511

M3 - Article

AN - SCOPUS:33750218356

SN - 1098-0121

VL - 74

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 13

M1 - 134511

ER -

In-plane angular dependence of the upper critical field in CeCoIn5

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