Anomalous doping effect on the superconducting state in CeCoIn$_5$ at high magnetic fields

Y. Tokiwa; R. Movshovich; F. Ronning; E. D. Bauer; A. D. Bianchi; Z. Fisk; J. D. Thompson

doi:10.1103/PhysRevB.82.220502

paper

Anomalous doping effect on the superconducting state in CeCoIn $_{5}$ at high magnetic fields

arXiv:1009.2910 · doi:10.1103/PhysRevB.82.220502

Abstract

We investigated the effect of electron and hole doping on the high-field low-temperature superconducting state in CeCoIn $_{5}$ by measuring specific heat of CeCo(In $_{1 - x}$ M $_{x}$ ) $_{5}$ with M=Sn, Cd and Hg and $x$ up to 0.33% at temperatures down to 0.1\,K and fields up to 14\,T. Although both Cd- and Hg-doping (hole-doping) suppresses the zero-field $T_{c}$ monotonically, $H_{c 2}$ increases with small amounts of doping and has a maximum around $x$ =0.2% (M=Cd). On the other hand, with Sn-doping (electron-doping) both zero-field $T_{c}$ and $H_{c 2}$ decrease monotonically. The critical temperature for the high-field low-temperature superconducting state (so called {\it Q}-state) correlates with $H_{c 2}$ and $T_{c}$ , which we interpret in support of the superconducting origin of this state.

Phys. Rev. B 82, 220502(R) (2010)

Anomalous doping effect on the superconducting state in CeCoIn $_{5}$ at high magnetic fields

Abstract

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Anomalous doping effect on the superconducting state in CeCoIn5​ at high magnetic fields

Abstract

References in corpus (6)

Cited by in corpus (16)

Anomalous doping effect on the superconducting state in CeCoIn $_{5}$ at high magnetic fields