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首页> 外文期刊>Physica, C. Superconductivity and its applications >Revisit the electronic phase diagram of high temperature superconductors: macroscopic phase separation in heavily overdoped regime
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Revisit the electronic phase diagram of high temperature superconductors: macroscopic phase separation in heavily overdoped regime

机译：重温高温超导体的电子相图：重掺杂状态下的宏观相分离

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摘要

Superconducting diamagnetic properties have been investigated on a series of La2-xSrxCuO4 single crystals. The superconducting transition curve M(T) evolves systematically from a one-step transition in the underdoped region to a two-step transition in the heavily overdoped regime. The unexpected second transition in the heavily overdoped region can be well explained within the framework of an electronic macroscopic phase separation. The resulting phase due to the phase separation contains many tiny superconducting islands surrounded by non-superconducting good metallic regions. Therefore in the overdoped region, the criticality of superconductivity becomes the same as that in the underdoped region although there are very different normal state properties between these two regions. This gives a strong indication that the superconductivity in the underdoped region and overdoped region may have the same underlying mechanism (pairing and phase coherence). (C) 2001 Elsevier Science B.V. All rights reserved. [References: 12]
机译：已经研究了一系列La2-xSrxCuO4单晶的超导抗磁性能。超导过渡曲线M（T）系统地从低掺杂区的一步过渡到重掺杂区的两步过渡。在电子宏观相分离的框架内，可以很好地解释重掺杂区中意外的第二过渡。由于相分离而产生的相包含许多由非超导良好金属区域包围的微小超导岛。因此，尽管在这两个区域之间有非常不同的常态特性，但是在超掺杂区域中，超导的临界值变得与低掺杂区域中的临界值相同。这有力地表明，掺杂不足区和掺杂区中的超导可能具有相同的基本机制（成对和相位相干性）。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：12]

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