2021/11/08 by Aabir Mukhopadhyay, Sourin Das, Mukhopadhyay, Aabir +1
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Topological Materials and Phenomena
paper · pdf · doi:10.48550/arxiv.2111.04762
openalex publication_date 2021/11/08 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28
It is known that Josephson junction (JJ) hosting scattering centers with\nenergy-dependent scattering amplitudes which breaks the\n\ω\→-\ω symmetry (where \ω is the excitation energy of\nelectron about the Fermi level) exhibits finite thermoelectric response. In\ncontrast, here we show that even in a ballistic JJ this symmetry is broken and\nit leads to a non-zero thermoelectric response when the junction length is of\nthe order of coherence length of the superconductor and the corresponding\nthermoelectric coefficient confirms to the universal sinusoidal dependence on\n\φ12, where \φ12 is the superconducting phase bias. In presence\nof multiple scatterers in the junction region, we have numerically shown that\nthe sign of the even-in-\φ12 part of the thermoelectric coefficient\nfluctuates violently from one disorder configuration to another hence averaging\nto vanishingly small values while the odd part tends towards the universal\nsinusoidal dependence on \φ12 as we approach the large disorder limit\nunder disorder averaging.\n