Institut für Theoretische Physik and Center for Collective Quantum Phenomena, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany.
Phys Rev Lett. 2010 Jun 11;104(23):237001. doi: 10.1103/PhysRevLett.104.237001. Epub 2010 Jun 10.
We demonstrate that in a d-wave superconductor the bulk nonlinear Meissner effect is dominated by a surface effect due to Andreev bound states at low temperatures. The contribution of this surface effect to the nonlinear response coefficient follows a 1/T3 law with the opposite sign compared to the bulk 1/T behavior. The crossover from bulk dominated behavior to surface dominated behavior occurs at a temperature of T/Tc∼1/square root(κ). We present an approximate analytical calculation, which supports our numerical calculations and provides a qualitative understanding of the effect. The effect can be probed by intermodulation distortion experiments.
我们证明，在 d 波超导体中，由于低温下的安德烈夫束缚态，体非线性迈斯纳效应主要由表面效应主导。与体 1/T 行为相比，这种表面效应对非线性响应系数的贡献遵循 1/T3 定律，符号相反。从体主导行为到表面主导行为的转变发生在温度 T/Tc∼1/square root(κ)处。我们提出了一个近似解析计算，该计算支持我们的数值计算，并提供了对该效应的定性理解。该效应可以通过互调失真实验来探测。
