Heat transport in RbFe2As2 single crystals: Evidence for nodal superconducting gap

Z. Zhang; A. F. Wang; X. C. Hong; J. Zhang; B. Y. Pan; J. Pan; Y. Xu; X. G. Luo; X. H. Chen; S. Y. Li

doi:10.1103/PhysRevB.91.024502

Heat transport in RbFe2As2 single crystals: Evidence for nodal superconducting gap

Z. Zhang
, A. F. Wang
, X. C. Hong
, J. Zhang
, B. Y. Pan
, J. Pan
, Y. Xu
, X. G. Luo
, X. H. Chen
, S. Y. Li

State Key Laboratory of Surface Physics
Fudan University
Hefei National Laboratory for Physical Sciences at Microscale
University of Science and Technology of China
Collaborative Innovation Center of Advanced Microstructures

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

39 Scopus citations

Abstract

The in-plane thermal conductivity of iron-based superconductor RbFe2As2 single crystal (Tc≈ 2.1 K) was measured down to 100 mK. In zero field, the observation of a significant residual linear term κ0/T = 0.65 mW K-2 cm-1 provides clear evidence for nodal superdonducting gap. The field dependence of κ0/T is similar to that of its sister compound CsFe2As2 with comparable residual resistivity ρ0 and lies between the dirty and clean KFe2As2. These results suggest that the (K, Rb, Cs)Fe2As2 serial superconductors have a common nodal gap structure.

Original language	English
Article number	024502
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.91.024502
State	Published - 6 Jan 2015
Externally published	Yes

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title = "Heat transport in RbFe2As2 single crystals: Evidence for nodal superconducting gap",

abstract = "The in-plane thermal conductivity of iron-based superconductor RbFe2As2 single crystal (Tc≈ 2.1 K) was measured down to 100 mK. In zero field, the observation of a significant residual linear term κ0/T = 0.65 mW K-2 cm-1 provides clear evidence for nodal superdonducting gap. The field dependence of κ0/T is similar to that of its sister compound CsFe2As2 with comparable residual resistivity ρ0 and lies between the dirty and clean KFe2As2. These results suggest that the (K, Rb, Cs)Fe2As2 serial superconductors have a common nodal gap structure.",

author = "Z. Zhang and Wang, \{A. F.\} and Hong, \{X. C.\} and J. Zhang and Pan, \{B. Y.\} and J. Pan and Y. Xu and Luo, \{X. G.\} and Chen, \{X. H.\} and Li, \{S. Y.\}",

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year = "2015",

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doi = "10.1103/PhysRevB.91.024502",

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TY - JOUR

T1 - Heat transport in RbFe2As2 single crystals

T2 - Evidence for nodal superconducting gap

AU - Zhang, Z.

AU - Wang, A. F.

AU - Hong, X. C.

AU - Zhang, J.

AU - Pan, B. Y.

AU - Pan, J.

AU - Xu, Y.

AU - Luo, X. G.

AU - Chen, X. H.

AU - Li, S. Y.

PY - 2015/1/6

Y1 - 2015/1/6

N2 - The in-plane thermal conductivity of iron-based superconductor RbFe2As2 single crystal (Tc≈ 2.1 K) was measured down to 100 mK. In zero field, the observation of a significant residual linear term κ0/T = 0.65 mW K-2 cm-1 provides clear evidence for nodal superdonducting gap. The field dependence of κ0/T is similar to that of its sister compound CsFe2As2 with comparable residual resistivity ρ0 and lies between the dirty and clean KFe2As2. These results suggest that the (K, Rb, Cs)Fe2As2 serial superconductors have a common nodal gap structure.

AB - The in-plane thermal conductivity of iron-based superconductor RbFe2As2 single crystal (Tc≈ 2.1 K) was measured down to 100 mK. In zero field, the observation of a significant residual linear term κ0/T = 0.65 mW K-2 cm-1 provides clear evidence for nodal superdonducting gap. The field dependence of κ0/T is similar to that of its sister compound CsFe2As2 with comparable residual resistivity ρ0 and lies between the dirty and clean KFe2As2. These results suggest that the (K, Rb, Cs)Fe2As2 serial superconductors have a common nodal gap structure.

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U2 - 10.1103/PhysRevB.91.024502

DO - 10.1103/PhysRevB.91.024502

M3 - 文章

AN - SCOPUS:84923312534

SN - 1098-0121

VL - 91

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 2

M1 - 024502

ER -

Heat transport in RbFe2As2 single crystals: Evidence for nodal superconducting gap

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