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Condensed Matter Physics Seminar - Jacob Linder

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This is part of a virtual seminar series in theoretical condensed matter and atomic physics, with the aim to connect researchers working at different Nordic universities. This seminar by Jacob Linder from NTNU is titled "Magnon spin current induced by triplet Cooper pair supercurrents".

Seminar
Date
21 Feb 2022
Time
13:15 - 14:15
Location
Digitally via Zoom
Additional info
Zoom-link to the seminar

Jacob Linder: Magnon spin current induced by triplet Cooper pair supercurrents

Abstract

At the interface between a ferromagnetic insulator and a superconductor there is a coupling between the spins of the two materials. We show that when a supercurrent carried by triplet Cooper pairs flows through the superconductor, the coupling induces a magnon spin current in the adjacent ferromagnetic insulator. The effect is dominated by Cooper pairs polarized in the same direction as the ferromagnetic insulator, so that charge and spin supercurrents produce similar results. Our findings demonstrate a way of converting Cooper pair supercurrents to magnon spin currents[1].  

[1] L. G. Johnsen, H. T. Simensen, A. Brataas, and J. Linder, Phys. Rev. Lett. 127, 207001 (2021)

The seminar is held digitally via Zoom

Zoom-link: https://nordita.org/zoom/nvcms

Read more about the seminar series

Condensed Matter Physics Seminar

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