Isotropic and Anisotropic g-Factor Corrections in GaAs Quantum Dots.

Autor:	Camenzind LC; Department of Physics, University of Basel, Basel 4056, Switzerland., Svab S; Department of Physics, University of Basel, Basel 4056, Switzerland., Stano P; Center for Emergent Matter Science, RIKEN, Saitama 351-0198, Japan.; Institute of Physics, Slovak Academy of Sciences, 845 11 Bratislava, Slovakia., Yu L; Department of Physics, University of Basel, Basel 4056, Switzerland., Zimmerman JD; Materials Department, University of California, Santa Barbara, California 93106, USA., Gossard AC; Materials Department, University of California, Santa Barbara, California 93106, USA., Loss D; Department of Physics, University of Basel, Basel 4056, Switzerland.; Center for Emergent Matter Science, RIKEN, Saitama 351-0198, Japan., Zumbühl DM; Department of Physics, University of Basel, Basel 4056, Switzerland.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2021 Jul 30; Vol. 127 (5), pp. 057701.
DOI:	10.1103/PhysRevLett.127.057701
Abstrakt:	We experimentally determine isotropic and anisotropic g-factor corrections in lateral GaAs single-electron quantum dots. We extract the Zeeman splitting by measuring the tunnel rates into the individual spin states of an empty quantum dot for an in-plane magnetic field with various strengths and directions. We quantify the Zeeman energy and find a linear dependence on the magnetic field strength that allows us to extract the g factor. The measured g factor is understood in terms of spin-orbit interaction induced isotropic and anisotropic corrections to the GaAs bulk g factor. Experimental detection and identification of minute band-structure effects in the g factor is of significance for spin qubits in GaAs quantum dots.
Databáze:	MEDLINE
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