Electrically-detected single-spin resonance with Quantum Spin Hall edge states
arXiv:2210.02917 · doi:10.1103/PhysRevB.107.094406
Abstract
Detection is most often the main impediment to reduce the number of spins in paramagnetic resonance experiments. Here we propose a new route to carry out electrically-detected spin resonance of an individual spin, placed at the edge of a quantum spin Hall insulator (QSHI). The edges of a QSHI host a one dimensional electron gas with perfect spin-momentum locking. Therefore, the spin relaxation induced by emission of an electron-hole pair at the edge state of the QSHI can generate current. Here we demonstrate that driving the system with an signal, a nonequilibrium occupation can be induced in the absence of applied bias voltage, resulting in a measurable current. We compute the current as a function of the Rabi frequency , the spin relaxation and decoherence times, and we discuss the feasibility of this experiment with state-of-the-art instrumentation.
arXiv comment5 pages, 1 figure
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