Parity-dependent shot noise and spin-flip relaxation process in a hybrid superconductor-nanowire quantum dot

Autor:	Takase, Keiko, Utsumi, Yasuhiro, Ashikawa, Yamato, Zhang, Guoqiang, Tateno, Kouta, Okazaki, Yuma, Sasaki, Satoshi
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science Physics - Applied Physics
Druh dokumentu:	Working Paper
Popis:	We report shot noise measurements for a quantum dot formed in an InAs nanowire suspended between superconducting electrodes. We find a clear alternation for the shot noise value in the Coulomb blockade regime between even and odd electron occupation in the dot, indicating that super-Poissonian (Poissonian) shot noise with the Fano factor reaching around 2 (1) occurs for even (odd) parity. With increasing magnetic field, the parity effect disappears and all the regimes show the Fano factor of around 1. The whole observation in our experiments quantitatively agrees with simulation obtained from full-counting statistics of cotunneling including spin-flip relaxation process, which corresponds to modelling electron motion in a quantum dot with strong spin-orbit interaction. Comment: 22 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2107.13928 Zobrazit plný text záznamu View this record from Arxiv