Dynamical Shiba states from precessing magnetic moments in an $s$-wave superconductor

Kaladzhyan, Vardan and Hoffman, Silas and Trif, Mircea. (2017) Dynamical Shiba states from precessing magnetic moments in an $s$-wave superconductor. Physical Review B, 95 (19). p. 195403.

Full text not available from this repository.

Official URL: https://edoc.unibas.ch/85174/

Downloads: Statistics Overview


We study theoretically the dynamics of a Shiba state forming around precessing classical spin in an s-wave superconductor. Utilizing a rotating wave description for the precessing magnetic impurity, we find the resulting Shiba bound state quasienergy and the spatial extension of the Shiba wave function. We show that such a precession pertains to dc charge and spin currents flowing through a normal STM tip tunnel coupled to the superconductor in the vicinity of the impurity. We calculate these currents and find that they strongly depend on the magnetic impurity precession frequency, precession angle, and on the position of the Shiba energy level in the superconducting gap. The resulting charge current is found to be proportional to the difference between the electron and hole wave functions of the Shiba state, being a direct measure for such an asymmetry. By dynamically driving the impurity one can infer the spin dependence of the Shiba states in the absence of a spin-polarized STM tip.
Faculties and Departments:05 Faculty of Science > Departement Physik
UniBasel Contributors:Kaladzhyan, Vardan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:19 Nov 2021 12:33
Deposited On:19 Nov 2021 12:33

Repository Staff Only: item control page