Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals

J. -F. Mercure; A. F. Bangura; Xiaofeng Xu; N. Wakeham; A. Carrington; P. Walmsley; M. Greenblatt; N. E. Hussey

doi:10.1103/PhysRevLett.108.187003

Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals

J. -F. Mercure, A. F. Bangura, Xiaofeng Xu, N. Wakeham, A. Carrington, P. Walmsley, M. Greenblatt, N. E. Hussey

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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Abstract

The upper critical field H-c2 of purple bronze Li0.9Mo6O17 is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed electrical resistivity anisotropy. With the field aligned along the most conducting axis, H-c2 increases monotonically with decreasing temperature to a value 5 times larger than the estimated paramagnetic pair-breaking field. Theories for the enhancement of H-c2 invoking spin-orbit scattering or strong-coupling superconductivity are shown to be inadequate in explaining the observed behavior, suggesting that the pairing state in Li0.9Mo6O17 is unconventional and possibly spin triplet.

Original language	English
Article number	187003
Pages (from-to)	-
Number of pages	5
Journal	Physical Review Letters
Volume	108
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.108.187003
Publication status	Published - 4 May 2012

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Normal and superconducting state electronic structure of iron based superconductors
Carrington, A. (Principal Investigator)
1/09/10 → 1/09/14
Project: Research
FRUSTRATION AND REDUCED DIMENSIONALITY AS ROUTES TO NEW FORMS OF QUANTUM ORDER
Hussey, N. E. (Principal Investigator)
1/01/09 → 1/01/12
Project: Research

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title = "Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals",

abstract = "The upper critical field H-c2 of purple bronze Li0.9Mo6O17 is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed electrical resistivity anisotropy. With the field aligned along the most conducting axis, H-c2 increases monotonically with decreasing temperature to a value 5 times larger than the estimated paramagnetic pair-breaking field. Theories for the enhancement of H-c2 invoking spin-orbit scattering or strong-coupling superconductivity are shown to be inadequate in explaining the observed behavior, suggesting that the pairing state in Li0.9Mo6O17 is unconventional and possibly spin triplet.",

author = "Mercure, {J. -F.} and Bangura, {A. F.} and Xiaofeng Xu and N. Wakeham and A. Carrington and P. Walmsley and M. Greenblatt and Hussey, {N. E.}",

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doi = "10.1103/PhysRevLett.108.187003",

language = "English",

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T1 - Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals

AU - Mercure, J. -F.

AU - Bangura, A. F.

AU - Xu, Xiaofeng

AU - Wakeham, N.

AU - Carrington, A.

AU - Walmsley, P.

AU - Greenblatt, M.

AU - Hussey, N. E.

PY - 2012/5/4

Y1 - 2012/5/4

N2 - The upper critical field H-c2 of purple bronze Li0.9Mo6O17 is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed electrical resistivity anisotropy. With the field aligned along the most conducting axis, H-c2 increases monotonically with decreasing temperature to a value 5 times larger than the estimated paramagnetic pair-breaking field. Theories for the enhancement of H-c2 invoking spin-orbit scattering or strong-coupling superconductivity are shown to be inadequate in explaining the observed behavior, suggesting that the pairing state in Li0.9Mo6O17 is unconventional and possibly spin triplet.

AB - The upper critical field H-c2 of purple bronze Li0.9Mo6O17 is found to exhibit a large anisotropy, in quantitative agreement with that expected from the observed electrical resistivity anisotropy. With the field aligned along the most conducting axis, H-c2 increases monotonically with decreasing temperature to a value 5 times larger than the estimated paramagnetic pair-breaking field. Theories for the enhancement of H-c2 invoking spin-orbit scattering or strong-coupling superconductivity are shown to be inadequate in explaining the observed behavior, suggesting that the pairing state in Li0.9Mo6O17 is unconventional and possibly spin triplet.

U2 - 10.1103/PhysRevLett.108.187003

DO - 10.1103/PhysRevLett.108.187003

M3 - Article (Academic Journal)

C2 - 22681108

SN - 0031-9007

VL - 108

SP - -

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 187003

ER -

Upper Critical Magnetic Field far above the Paramagnetic Pair-Breaking Limit of Superconducting One-Dimensional Li0.9Mo6O17 Single Crystals

Abstract

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Projects

Normal and superconducting state electronic structure of iron based superconductors

FRUSTRATION AND REDUCED DIMENSIONALITY AS ROUTES TO NEW FORMS OF QUANTUM ORDER

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