$\varphi$ Josephson junction induced by altermagnetism

Autor:	Lu, Bo, Maeda, Kazuki, Ito, Hiroyuki, Yada, Keiji, Tanaka, Yukio
Rok vydání:	2024
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We study the Josephson effect in a superconductor/altermagnet/superconductor (S/AM/S) junction. We find anomalous phenomena including $0$-$\pi$ transition as well as multi-nodal current-phase relations. Similar to $d$-wave superconductor, $d$-wave altermagnet can support $\varphi$ junction where free energy minima locate neither $\varphi=0$ nor $\pm \pi$ with double degeneracy. These properties can be tunable by parameters, e.g., the exchange energy, the orientation of crystal axis, the length, and the applied gate voltage of altermagnet. These rich features lead to accessible functionality of S/AM/S junction. Comment: 6 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2405.10656 Zobrazit plný text záznamu View this record from Arxiv