Anomalous temperature dependence of spin susceptibility around a nonmagnetic impurity in high- (formula presented) cuprate superconductors

研究成果: Article

抄録

Local magnetic properties around a nonmagnetic impurity are investigated in the superconducting state of high- (formula presented) cuprates. We consider a model two-dimensional (formula presented)-wave superconductor with strong antiferromagnetic (AF) spin fluctuations and calculate the spin susceptibility around the impurity. We show that the uniform susceptibility, which is usually suppressed in spin-singlet superconductivity, increases with decreasing temperature around the impurity when the impurity scattering is in the unitarity limit. This anomalous temperature dependence is more remarkable when the impurity potential is extended spatially and the AF spin fluctuations are stronger. Our results agree with the anomalous temperature dependence of the Knight shift on Li that was recently observed in (formula presented).

元の言語English
ページ(範囲)1-8
ページ数8
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
66
発行部数5
DOI
出版物ステータスPublished - 2002 1 1
外部発表Yes

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cuprates
Impurities
magnetic permeability
impurities
temperature dependence
Spin fluctuations
Temperature
Superconductivity
two dimensional models
Superconducting materials
Magnetic properties
superconductivity
Cuprate superconductors
Scattering
magnetic properties
nuclear magnetic resonance
scattering
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

これを引用

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abstract = "Local magnetic properties around a nonmagnetic impurity are investigated in the superconducting state of high- (formula presented) cuprates. We consider a model two-dimensional (formula presented)-wave superconductor with strong antiferromagnetic (AF) spin fluctuations and calculate the spin susceptibility around the impurity. We show that the uniform susceptibility, which is usually suppressed in spin-singlet superconductivity, increases with decreasing temperature around the impurity when the impurity scattering is in the unitarity limit. This anomalous temperature dependence is more remarkable when the impurity potential is extended spatially and the AF spin fluctuations are stronger. Our results agree with the anomalous temperature dependence of the Knight shift on Li that was recently observed in (formula presented).",
author = "Yoji Ohashi",
year = "2002",
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doi = "10.1103/PhysRevB.66.054522",
language = "English",
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journal = "Physical Review B-Condensed Matter",
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AU - Ohashi, Yoji

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N2 - Local magnetic properties around a nonmagnetic impurity are investigated in the superconducting state of high- (formula presented) cuprates. We consider a model two-dimensional (formula presented)-wave superconductor with strong antiferromagnetic (AF) spin fluctuations and calculate the spin susceptibility around the impurity. We show that the uniform susceptibility, which is usually suppressed in spin-singlet superconductivity, increases with decreasing temperature around the impurity when the impurity scattering is in the unitarity limit. This anomalous temperature dependence is more remarkable when the impurity potential is extended spatially and the AF spin fluctuations are stronger. Our results agree with the anomalous temperature dependence of the Knight shift on Li that was recently observed in (formula presented).

AB - Local magnetic properties around a nonmagnetic impurity are investigated in the superconducting state of high- (formula presented) cuprates. We consider a model two-dimensional (formula presented)-wave superconductor with strong antiferromagnetic (AF) spin fluctuations and calculate the spin susceptibility around the impurity. We show that the uniform susceptibility, which is usually suppressed in spin-singlet superconductivity, increases with decreasing temperature around the impurity when the impurity scattering is in the unitarity limit. This anomalous temperature dependence is more remarkable when the impurity potential is extended spatially and the AF spin fluctuations are stronger. Our results agree with the anomalous temperature dependence of the Knight shift on Li that was recently observed in (formula presented).

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JO - Physical Review B-Condensed Matter

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