Spin-orbit splitting in semiconductor quantum dots with a parabolic confinement potential

In this work, we report the magnetocaloric effect (MCE) in a quantum dot corresponding to an electron interacting with an antidot, under the effect of an Aharonov-Bohm flux subjected to a parabolic confinement potential. We use the Bogachek and Landman model, which additionally allows the study of quantum dots with Fock-Darwin energy levels for vanishing antidot radius and flux. We find that the Aharonov-Bohm flux (AB-flux) strongly controls the oscillatory behaviour of the MCE, thus acting as a control parameter for the cooling or heating of the magnetocaloric effect. We propose a way to detect AB-flux by measuring temperature differences.

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Stationary Schrödinger equations governing electronic states of quantum dots in the presence of spin-orbit splitting

Applications of Mathematics ◽

10.1007/s10492-007-0014-5 ◽

2007 ◽

Vol 52 (3) ◽

pp. 267-284 ◽

Cited By ~ 4

Author(s):

Marta M. Betcke ◽

Heinrich Voss

Keyword(s):

Quantum Dots ◽

Electronic States ◽

Schrodinger Equations ◽

Spin Orbit ◽

Schrödinger Equations ◽

Orbit Splitting ◽

Spin Orbit Splitting

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Magnetocaloric Effect in an Antidot: The Effect of the Aharonov-Bohm Flux and Antidot Radius

Entropy ◽

10.3390/e20110888 ◽

2018 ◽

Vol 20 (11) ◽

pp. 888 ◽

Cited By ~ 3

Author(s):

Oscar Negrete ◽

Francisco Peña ◽

Patricio Vargas

Keyword(s):

Quantum Dots ◽

Magnetocaloric Effect ◽

Control Parameter ◽

Energy Levels ◽

Oscillatory Behaviour ◽

Confinement Potential ◽

Parabolic Confinement ◽

Parabolic Confinement Potential ◽

Aharonov Bohm

In this work, we report the magnetocaloric effect (MCE) for an electron interacting with an antidot, under the effect of an Aharonov-Bohm flux (AB-flux) subjected to a parabolic confinement potential. We use the Bogachek and Landman model, which additionally allows the study of quantum dots with Fock-Darwin energy levels for vanishing antidot radius and AB-flux. We find that AB-flux strongly controls the oscillatory behaviour of the MCE, thus acting as a control parameter for the cooling or heating of the magnetocaloric effect. We propose a way to detect AB-flux by measuring temperature differences.

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Quantum Confined Electron-Hole States in ZnSe Quantum Dots

MRS Proceedings ◽

10.1557/proc-571-259 ◽

1999 ◽

Vol 571 ◽

Cited By ~ 2

Author(s):

H. W. H. Lee ◽

C. A. Smith ◽

V. J. Leppert ◽

S. H. Risbud

Keyword(s):

Quantum Dots ◽

Size Dependence ◽

Energy Gap ◽

Stokes Shift ◽

Spin Orbit ◽

Electron Hole ◽

Orbit Splitting ◽

Spin Orbit Splitting ◽

Trap Emission ◽

Quantum Confined

ABSTRACTWe observed the quantum confined bandedge emission from ZnSe quantum dots and the size dependence of the energy states, spin-orbit interaction, and Stokes shift. The bandedge emission occurs in the UV-blue. The energy gap = Eg + C/dn where d is the diameter and n is 1. 19 ± 0.13 and 1.21 ± 0.13 for the first and second electron-hole transitions, respectively. The separation between these transitions approaches the bulk spin-orbit splitting, while the Stokes shift decreases with particle size. Effective mass theories can not explain these results. Trap emission is observed in some samples in the green and red, resulting from Se-related traps.

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