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Titolo:
Coupling and dissociation in artificial molecules
Autore:
Yannouleas, C; Landman, U;
Indirizzi:
Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA Georgia Inst Technol Atlanta GA USA 30332 Sch Phys, Atlanta, GA 30332 USA
Titolo Testata:
EUROPEAN PHYSICAL JOURNAL D
fascicolo: 1-3, volume: 16, anno: 2001,
pagine: 373 - 380
SICI:
1434-6060(200109)16:1-3<373:CADIAM>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
DENSITY-FUNCTIONAL THEORY; INDEPENDENT-PARTICLE MOTION; QUANTUM DOTS; 2-ELECTRON STATES; MAGNETIC-FIELD; ATOMS; DEFORMATION; SPECTRA; HELIUM; MODEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Yannouleas, C Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA Georgia Inst Technol Atlanta GA USA 30332 nta, GA 30332 USA
Citazione:
C. Yannouleas e U. Landman, "Coupling and dissociation in artificial molecules", EUR PHY J D, 16(1-3), 2001, pp. 373-380

Abstract

We show that the spin-and-space unrestricted Hartree-Fock method, in conjunction with the companion step of the restoration of spin and space symmetries,ia Projection Techniques (when such symmetries are broken), is able to describe the full range of couplings in two-dimensional double quantum dots, from the strung-coupling regime exhibiting delocalized molecular orbitalsto the weak-coupling and dissociation regimes associated with a Generalized Valence Bond combination of atomic-type orbitals localized on the individual dots. The weak-coupling regime is always accompanied by an antiferromagnetic ordering of the spins of the individual dots, The cases of dihydrogen(H-2, 2e) and dilithium (Li-2, 6e) quantum dot molecules are discussed in detail.

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Documento generato il 28/01/20 alle ore 14:52:36