Interplay of superconductivity and fermi-liquid transport in rh-Doped CaFe2As2 with lattice-collapse transition

Masataka Danura; Kazutaka Kudo; Yoshihiro Oshiro; Shingo Araki; Tatsuo C. Kobayashi; Minoru Nohara

doi:10.1143/JPSJ.80.103701

Interplay of superconductivity and fermi-liquid transport in rh-Doped CaFe₂As₂ with lattice-collapse transition

Masataka Danura, Kazutaka Kudo, Yoshihiro Oshiro, Shingo Araki, Tatsuo C. Kobayashi, Minoru Nohara

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

35 Citations (Scopus)

Abstract

Ca(Fe_1-xRhx)₂As₂ undergoes successive phase transitions with increasing Rh doping in the T = 0 limit. The antiferromagnetic-metal phase with orthorhombic structure at 0:00 ≤ x ≤ 0:020 is driven to a superconducting phase with uncollapsed-tetragonal (ucT) structure at 0:020 ≤ x ≤ 0:024; a non-superconducting collapsed-tetragonal (cT) phase takes over at x ≥ 0:024. The breakdown of Fermi-liquid transport is observed in the ucT phase above T_c. In the adjacent cT phase, Fermi-liquid transport is restored along with a disappearance of superconductivity. This interplay of superconductivity and Fermi-liquid transport suggests the essential role of magnetic fluctuations in the emergence of superconductivity in doped CaFe₂As₂.

Original language	English
Article number	103701
Journal	journal of the physical society of japan
Volume	80
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.80.103701
Publication status	Published - Oct 2011

Keywords

Fermi-liquid transport
Iron-based superconductors
Lattice collapse transition

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.80.103701

Cite this

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title = "Interplay of superconductivity and fermi-liquid transport in rh-Doped CaFe2As2 with lattice-collapse transition",

abstract = "Ca(Fe1-xRhx)2As2 undergoes successive phase transitions with increasing Rh doping in the T = 0 limit. The antiferromagnetic-metal phase with orthorhombic structure at 0:00 ≤ x ≤ 0:020 is driven to a superconducting phase with uncollapsed-tetragonal (ucT) structure at 0:020 ≤ x ≤ 0:024; a non-superconducting collapsed-tetragonal (cT) phase takes over at x ≥ 0:024. The breakdown of Fermi-liquid transport is observed in the ucT phase above Tc. In the adjacent cT phase, Fermi-liquid transport is restored along with a disappearance of superconductivity. This interplay of superconductivity and Fermi-liquid transport suggests the essential role of magnetic fluctuations in the emergence of superconductivity in doped CaFe2As2.",

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AU - Danura, Masataka

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AU - Araki, Shingo

AU - Kobayashi, Tatsuo C.

AU - Nohara, Minoru

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AB - Ca(Fe1-xRhx)2As2 undergoes successive phase transitions with increasing Rh doping in the T = 0 limit. The antiferromagnetic-metal phase with orthorhombic structure at 0:00 ≤ x ≤ 0:020 is driven to a superconducting phase with uncollapsed-tetragonal (ucT) structure at 0:020 ≤ x ≤ 0:024; a non-superconducting collapsed-tetragonal (cT) phase takes over at x ≥ 0:024. The breakdown of Fermi-liquid transport is observed in the ucT phase above Tc. In the adjacent cT phase, Fermi-liquid transport is restored along with a disappearance of superconductivity. This interplay of superconductivity and Fermi-liquid transport suggests the essential role of magnetic fluctuations in the emergence of superconductivity in doped CaFe2As2.

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