SELECTIVITY OF SPIN STATES IN PLANAR QUANTUM RINGS IN A STRONG MAGNETIC FIELD
Vadim Borisovich Oshurko,
Elena Evgenievna Karpova,
Kirill Georgievich Solomakho Abstract
The electronic states of flat thin quantum rings of rectangular cross section whose thickness h, inner radius Rin and outer Rex are related by the relations ; in are considered; hereinafter we will call them “quantum shims”. It is found that this type of narrow-gap heterostructures in a wide-gap matrix can become basic elements for spintronic systems. Their spectrum in an external magnetic field can be reduced to a single stable level, all quantum numbers of which (spin including) are controlled by the external field. This is proved both by numerical calculations and approximate analytical estimates, clarifying the mechanism of formation of such a state. Because of the conservation of an undamped quantum current and the associated magnetic moment, these states are more stable than in ideal quantum dots with a similar spectrum. The variants of changing the spin state of the electron localized on the puck by a longitudinal magnetic field are considered
About the Authors
Arkady Mikhailovich MandelRussian Federation
Associate Professor, Department of Physics
Vadim Borisovich Oshurko
Russian Federation
Elena Evgenievna Karpova
Russian Federation
Associate Professor, Department of Physics
Kirill Georgievich Solomakho
Russian Federation
Senior Lecturer, Department of Physics
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For citations:
Mandel A.M., Oshurko V.B., Karpova E.E., Solomakho K.G. SELECTIVITY OF SPIN STATES IN PLANAR QUANTUM RINGS IN A STRONG MAGNETIC FIELD. Izvestiya Vysshikh Uchebnykh Zavedenii. Materialy Elektronnoi Tekhniki = Materials of Electronics Engineering. 2025;28(2).
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