0000000001092650

AUTHOR

Satoshi Sasaki

showing 2 related works from this author

Ellipsoidal deformation of vertical quantum dots

1999

Addition energy spectra at 0 T of circular and ellipsoidally deformed few-electron vertical quantum dots are measured and compared to results of model calculations within spin-density functional theory. Because of the rotational symmetry of the lateral harmonic confining potential, circular dots show a pronounced shell structure. With the lifting of the single- particle level degeneracies, even a small deformation is found to radically alter the shell structure leading to significant modifications in the addition energy spectra. Breaking the circular symmetry with deformation also induces changes in the total spin. This "piezo-magnetic" behavior of quantum dots is discussed, and the additio…

PhysicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed matter physicsQuantum dotMesoscale and Nanoscale Physics (cond-mat.mes-hall)Rotational symmetryFOS: Physical sciencesCircular symmetryDeformation (meteorology)AnisotropyGround stateSpin-½Magnetic field
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Vertical quantum dots with elliptically deformed cross sections

1999

Abstract Few-electron vertical quantum dot artificial atoms with circular and elliptically deformed cross sections are investigated. Because of the high symmetry of the lateral confining potential, circular dots show a pronounced shell structure. With the lifting of level degeneracies, even a small deformation in shape is found to radically alter the shell structure leading to significant modifications of the addition energy spectra, and to induce change in the total spin.

PhysicsArtificial atomCondensed matter physicsQuantum dotElectrical and Electronic EngineeringDeformation (meteorology)Condensed Matter PhysicsSymmetry (physics)Spectral lineElectronic Optical and Magnetic MaterialsSpin-½Physica B: Condensed Matter
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