Electrically-detected single-spin resonance with Quantum Spin Hall edge states

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 $AC$ signal, a nonequilibrium occupation can be induced in the absence of applied bias voltage, resulting in a $DC$ measurable current. We compute the $DC$ current as a function of the Rabi frequency $\Omega$, the spin relaxation and decoherence times, $T_1$ and we discuss the feasibility of this experiment with state-of-the-art instrumentation.

5 pages, 1 figure

References in corpus (19)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Driven coherent oscillations of a single electron spin in a quantum dot
• Nonlocal edge state transport in the quantum spin Hall state
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• The Helical Liquid and the Edge of Quantum Spin Hall Systems
• Electrically driven single electron spin resonance in a slanting Zeeman field
• One-dimensional Topological Edge States of Bismuth Bilayers
• Kondo effect in the helical edge liquid of the quantum spin Hall state
• Conductance of a helical edge liquid coupled to a magnetic impurity
• Inductive-detection electron-spin resonance spectroscopy with $65$spins$/\sqrt{\text{Hz}}$ sensitivity
• Tuning the exchange bias on a single atom from 1 mT to 10 T
• Spin decoherence of magnetic atoms on surfaces
• Helical edge states coupled to a spin bath: Current-induced magnetization
• A cotunneling mechanism for all-electrical Electron Spin Resonance of single adsorbed atoms
• The emergence of classical behavior in magnetic adatoms
• A theoretical review on the single-impurity electron spin resonance on surfaces
• Current noise from a magnetic moment in a helical edge
• Observation of backscattering induced by magnetism in a topological edge state

Cited by in corpus (1)

• Finite-frequency admittance and noise of a helical edge coupled to a magnet