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Isotropic superconducting state and high critical currents in Fe1+yTe1-xSx single crystals

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arxiv 0903.4430 v2 pith:QEQQ3S7U submitted 2009-03-25 cond-mat.supr-con

Isotropic superconducting state and high critical currents in Fe1+yTe1-xSx single crystals

classification cond-mat.supr-con
keywords criticalfieldgammasinglesuperconductingupperanisotropycrystal
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report single crystal growth and a study of superconducting properties in Fe_{1+y}Te_{1-x}S_{x}. We demonstrate the smallest upper critical field anisotropy, gamma=H_{c2}^{//c}/H_{c2}^{//a}, among all iron based superconductors, the value of gamma reaches 1.05 at T=0.65T_{C} for Fe_{1.09}Te_{0.89}S_{0.11}, while still maintaining large values of upper critical field.

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