paper

Spin-Orbit Coupling Fluctuations as a Mechanism of Spin Decoherence

arXiv:1505.03177 · doi:10.1103/PhysRevB.96.180408

Abstract

We discuss a general framework to address spin decoherence resulting from fluctuations in a spin Hamiltonian. We performed a systematic study on spin decoherence in the compound K $_{6}$ [V $_{15}$ As $_{6}$ O $_{42}$ (D $_{2}$ O)] $\cdot$ 8D $_{2}$ O, using high-field Electron Spin Resonance (ESR). By analyzing the anisotropy of resonance linewidths as a function of orientation, temperature and field, we find that the spin-orbit term is a major decoherence source. The demonstrated mechanism can alter the lifetime of any spin qubit and we discuss how to mitigate it by sample design and field orientation.

submitted