Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors

Sudhansu S. Mandal; T. V. Ramakrishnan

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Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors

机译：超导幅度和相位的显微镜自由能功能：无序超导体中的超流体密度

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Recent experiments on disordered superconductors find that the superfluid density n_s(T) decreases dramatically and characteristically with disorder, differently from what is expected for a mean order parameter field or BCS, amplitude only, picture for the superconductor. We describe here a new microscopic free energy functional which explicitly describes its dependence on both the amplitude and phase of superconducting order, in a gauge invariant manner. We use this here in an approximation of noninteracting phase fluctuations (Gaussian or harmonic approximation) to obtain n_s(T) in the presence of (static) disorder. We compare our results successfully with experiment.

机译：最近关于无序超导体的实验发现超流密度N_S（t）显着且性感地随着病症而剧烈降低，不同地从对平均订单参数字段或BCS，幅度，超导体的图像不同。我们在这里描述了一种新的微观能量功能，其明确地描述了其对超导顺序的幅度和相位的依赖性，以仪表不变的方式。我们在此处使用此处的非交互相位波动（高斯或谐波近似）以在（静态）紊乱存在下获得N_S（t）。我们通过实验将我们的结果进行比较。

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《Physical review》 |2020年第2期|024514.1-024514.8|共8页
作者
Sudhansu S. Mandal; T. V. Ramakrishnan;
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Department of Physics Indian Institute of Technology Kharagpur 721302 India Centre for Theoretical Studies Indian Institute of Technology Kharagpur 721302 India;

Department of Physics Indian Institute of Science Bangalore 5600012 India;

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1. Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors [J] . Mandal Sudhansu S., Ramakrishnan T. V Physical review, B . 2020,第2期

机译：超导幅度和相位的显微镜自由能功能：无序超导体中的超流体密度
2. Quasiclassical free energy of superconductors: Disorder-driven first-order phase transition in superconductor/ferromagnetic-insulator bilayers [J] . Pauli Virtanen, Artjom Vargunin, Mikhail Silaev Physical review . 2020,第9期

机译：超导体的准经典自由能：超导体/铁磁绝缘体双层中无序驱动的一阶相变
3. Quasiclassical free energy of superconductors: Disorder-driven first-order phase transition in superconductor/ferromagnetic-insulator bilayers [J] . Physical review, B . 2020,第9期

机译：超导体的拟CSISCLASCALLICALE：超导体/铁磁 - 绝缘体双层中的无序驱动的一阶相转变
4. Condensation Energy and Tc within the Density Functional Theory for Superconductors [C] . Magorzata Wierzbowska, Stefano de Gironcoli, Jesper W. Krogh, Training Course in the Physics of Correlated Electron Systems and High-Tc Superconductors . 2005

机译：超导体密度泛函理论内的凝结能和Tc
5. Quantum phase transitions in disordered superconductors and detection of modulated superfluidity in imbalanced Fermi gases [D] . Swanson, Mason. 2014

机译：无序超导体中的量子相变和费米气体不平衡中调制超流的检测
6. Anomalous superfluid density in quantum critical superconductors [O] . Kenichiro Hashimoto, Yuta Mizukami, Ryo Katsumata, 2013

机译：量子临界超导体中的异常超流体密度
7. Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors [O] . Sudhansu S. Mandal, T. V. Ramakrishnan 2020

机译：超导幅度和相位的显微镜自由能功能：无序超导体中的超流体密度

Microscopic free energy functional of superconductive amplitude and phase: Superfluid density in disordered superconductors

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