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首页> 外文期刊>Physical review >Evolution of self-organized bulk vortex structure induced by hole doping in the high-temperature superconductor YBa_2Cu_3O_(7-δ)
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Evolution of self-organized bulk vortex structure induced by hole doping in the high-temperature superconductor YBa_2Cu_3O_(7-δ)

机译:高温超导体YBa_2Cu_3O_(7-δ)中空穴掺杂引起的自组织体涡结构的演变

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摘要

Studies of the persistent current relaxation of YBa_2Cu_3O_(7-δ) ring-shaped thin films as a function of oxygen concentration (with 24 increments in δ every ~0.021, over a range between 0.03 and 0.55) allowed us to construct the (μ, δ) phase diagram where the exponent μ characterizes the pinning ability and the nature of the vortex structure. The reduction of the hole-doping level (an increase in δ) transforms the vortex structure from quasi-lattice into a glass and subsequently into a pinned liquid phase. These vortex phases self-organize and produce relaxation plateaus in regions between steplike changes in the dependence of relaxation kinetics on hole doping.
机译:研究YBa_2Cu_3O_(7-δ)环形薄膜的持续电流弛豫随氧浓度的变化(δ值每〜0.021,在0.03至0.55范围内,δ都有24个增量),我们可以构造(μ, δ)相图,其中指数μ表征了钉扎能力和涡旋结构的性质。空穴掺杂水平的降低(δ的增加)将涡旋结构从准晶格转变为玻璃,然后转变为固定液相。这些涡旋相自组织并在弛豫动力学对空穴掺杂的依赖性之间的阶梯状变化之间的区域中产生弛豫平台。

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