Berezinskii-Kosterlitz-Thouless transition in homogeneously disordered superconducting films
Berezinskii-Kosterlitz-Thouless transition in homogeneously disordered superconducting films
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DOI：
10.1103/physrevb.92.214503
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发表时间：
2015-09
影响因子：
3.7
通讯作者：
E. König;A. Levchenko;I. Protopopov;I. Gornyi;I. Burmistrov;A. Mirlin
中科院分区：
文献类型：
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作者：
E. König;A. Levchenko;I. Protopopov;I. Gornyi;I. Burmistrov;A. Mirlin
我们发展了均匀无序超导薄膜中涡旋非束缚相变的理论。这一理论结合了量子、介观和热起伏的影响，起因于从超导相干长度到费米波长的长度尺度。特别地，我们将扩散非线性Sigma模型的重整化群处理推广到相变的超导一侧。此外，我们还研究了Ginzburg-Landau泛函中参数的介观涨落。利用发展的理论，我们确定了基本可观量(包括涡旋分离温度、超导密度以及随温度变化的电阻率和热导率)与微观特征的依赖关系，如无序诱导散射率和裸相互作用耦合。
We develop a theory for the vortex unbinding transition in homogeneously disordered superconducting films. This theory incorporates the effects of quantum, mesoscopic and thermal fluctuations stemming from length scales ranging from the superconducting coherence length down to the Fermi wavelength. In particular, we extend the renormalization group treatment of the diffusive nonlinear sigma model to the superconducting side of the transition. Furthermore, we explore the mesoscopic fluctuations of parameters in the Ginzburg-Landau functional. Using the developed theory, we determine the dependence of essential observables (including the vortex unbinding temperature, the superconducting density, as well as the temperature-dependent resistivity and thermal conductivity) on microscopic characteristics such as the disorder-induced scattering rate and bare interaction couplings.