We present excitation energy spectra of few-electron vertically coupled quantum dots for strong and intermediate interdot coupling. By applying a magnetic field, we induce ground state transitions and identify the corresponding quantum numbers by comparison with few-body calculations. In addition to atomiclike states, we find novel "molecularlike" phases. The isospin index characterizes the nature of the bond of the artificial molecule and this we control. Like spin in a single quantum dot, transitions in isospin leading to full polarization are observed with increasing magnetic field.

Molecular phases in coupled quantum dots / M., Rontani; S., Amaha; K., Muraki; Manghi, Franca; Molinari, Elisa; S., Tarucha; D. G., Austing. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 69:(2004), pp. 085327-1-085327-7. [10.1103/PhysRevB.69.085327]

Molecular phases in coupled quantum dots

MANGHI, Franca;MOLINARI, Elisa;
2004

Abstract

We present excitation energy spectra of few-electron vertically coupled quantum dots for strong and intermediate interdot coupling. By applying a magnetic field, we induce ground state transitions and identify the corresponding quantum numbers by comparison with few-body calculations. In addition to atomiclike states, we find novel "molecularlike" phases. The isospin index characterizes the nature of the bond of the artificial molecule and this we control. Like spin in a single quantum dot, transitions in isospin leading to full polarization are observed with increasing magnetic field.
2004
69
085327-1
085327-7
Molecular phases in coupled quantum dots / M., Rontani; S., Amaha; K., Muraki; Manghi, Franca; Molinari, Elisa; S., Tarucha; D. G., Austing. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 69:(2004), pp. 085327-1-085327-7. [10.1103/PhysRevB.69.085327]
M., Rontani; S., Amaha; K., Muraki; Manghi, Franca; Molinari, Elisa; S., Tarucha; D. G., Austing
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/714034
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