Asymmetric Andreev Reflection Induced Electrical and Thermal Hall-like Effects in Metal/Anisotropic Superconductor Junctions
arXiv:1306.4282 · doi:10.1103/PhysRevB.89.064512
Abstract
By investigating the nonequilibrium transport across a metal/superconductor junction in both nonrelativistic and relativistic cases, we reveal that the asymmetric Andreev reflection with anisotropic superconductors is able to induce the electric and thermal Hall-like effect, in the absence of magnetic field. That is, a longitudinal electric voltage or temperature bias can induce transverse electric or thermal currents merely through the asymmetric Andreev reflection, respectively. In particular, a transverse thermoelectric effect, i.e., the Ettingshausen-like effect, is identified, although the conjugate Nernst effect is absent. The direction change of these electric and thermal Hall-like currents is also discussed. The Hall-like effects uncovered here do not require the conventional time-reversal symmetry breaking, but rather originate from the mirror symmetry breaking with respect to the interface normal due to the anisotropic paring symmetry of the superconductor.
5 pages, 3 figures, published as Phys. Rev. B 89, 064512 (2014). See also http://journals.aps.org/prb/abstract/10.1103/PhysRevB.89.064512
References in corpus (9)
- Topological insulators and superconductors
- Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
- Chiral tunneling and the Klein paradox in graphene
- Specular Andreev reflection in graphene
- Tunneling conductance of graphene NIS junctions
- Quantum Hall effect in graphene with superconducting electrodes
- Driving Perpendicular Heat Flow: Ambipolar Transverse Thermoelectrics for Microscale and Cryogenic Peltier Cooling
- Current resonances in graphene with time dependent potential barriers
- Anomalous Energy Transport across Topological Insulator Superconductor Junctions