The limit of spin lifetime in solid-state electronic spins
- URL: http://arxiv.org/abs/2004.04007v1
- Date: Wed, 8 Apr 2020 14:27:36 GMT
- Title: The limit of spin lifetime in solid-state electronic spins
- Authors: Alessandro Lunghi and Stefano Sanvito
- Abstract summary: We provide a complete first-principles picture of spin relaxation that includes up to two-phonon processes.
We study a vanadium-based molecular qubit and reveal that the spin lifetime at high temperature is limited by Raman processes.
- Score: 77.34726150561087
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The development of spin qubits for quantum technologies requires their
protection from the main source of finite-temperature decoherence: atomic
vibrations. Here we eliminate one of the main barriers to the progress in this
field by providing a complete first-principles picture of spin relaxation that
includes up to two-phonon processes. Our method is based on machine learning
and electronic structure theory and makes the prediction of spin lifetime in
realistic systems feasible. We study a prototypical vanadium-based molecular
qubit and reveal that the spin lifetime at high temperature is limited by Raman
processes due to a small number of THz intra-molecular vibrations. These
findings effectively change the conventional understanding of spin relaxation
in this class of materials and open new avenues for the rational design of
long-living spin systems.
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