Theory of spin-polarized current flow through a localized spin triplet state

Stephen R McMillan; Michael E Flatté

doi:10.48550/arxiv.2112.14805

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Theory of spin-polarized current flow through a localized spin triplet state

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Theory of spin-polarized current flow through a localized spin triplet state

Stephen R McMillan and Michael E Flatté

12/29/2021

DOI: 10.48550/arxiv.2112.14805

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Abstract

We derive a formalism describing quantum-coherent features of spin-polarized charge current through a partially-polarized spin triplet defect in a $\textit{transverse}$ magnetic field. We predict distinct few-milli-tesla-dc magnetoresistance signatures that identify a $\textit{single}$ spin-triplet center's character and reveal the orientation of the spin triplet's zero-field splitting axis relative to the magnetic contact's polarization. For example, in 4H-SiC the single $(hh)$, $(kk)$, $(hk)$, and $(kh)$ divacancies are all distinct. Spin-polarized current flow efficiently polarizes the spin, potentially electrically initializing spin-triplet-based qubits.

Physics - Mesoscale and Nanoscale Physics

Details

Title: Subtitle: Theory of spin-polarized current flow through a localized spin triplet state
Creators: Stephen R McMillan
Michael E Flatté
Resource Type: Preprint
DOI: 10.48550/arxiv.2112.14805
Language: English
Date posted: 12/29/2021
Academic Unit: Electrical and Computer Engineering; Physics and Astronomy
Record Identifier: 9984442196502771

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