Viscosity of quantized vortices of high-Tc superconductors, La2−xSrxCuO4 as a function of carrier concentration

A. Maeda, T. Umetsu, H. Kitano

doi:10.1016/j.physc.2007.04.095

Viscosity of quantized vortices of high-Tc superconductors, La2−xSrxCuO4 as a function of carrier concentration

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書誌事項

公開日: 2007-09

権利情報

https://www.elsevier.com/tdm/userlicense/1.0/

DOI

10.1016/j.physc.2007.04.095

公開者: Elsevier BV

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説明

Abstract We have investigated the viscosity of vortices in La 2− x Sr x CuO 4 as a function of carrier doping from x = 0.07 to x = 0.20. We found that the optimally doped material exhibited the moderately clean nature (l ∼ ξ , where l is the mean free path of quasi-particles in the core and ξ is the GL coherence length (≃ core radius)), whereas underdoped materials show smaller viscosity, suggesting some changes exist in the condensate in the underdoped region.