Description of collective spin excitations in deformed nuclei within a projected single-particle basis

1992 ◽  
Vol 46 (5) ◽  
pp. 1782-1787 ◽  
Author(s):  
A. A. Raduta ◽  
I. I. Ursu ◽  
N. Lo Iudice
Keyword(s):  
Single Particle ◽  
Deformed Nuclei ◽  
Spin Excitations ◽  
Single Particle Basis

A projected single-particle basis for deformed nuclei

1993 ◽  
Vol 551 (1) ◽  
pp. 93-108 ◽  
Author(s):  
A.A. Raduta ◽  
D.S. Delion ◽  
N. Lo Iudice
Keyword(s):  
Single Particle ◽  
Deformed Nuclei ◽  
Single Particle Basis

EXACT WAVEFUNCTION OF THE ONE-DIMENSIONAL DOUBLE-EXCHANGE MODEL WITH ONE ELECTRON

2012 ◽  
Vol 26 (30) ◽  
pp. 1250154 ◽  
Author(s):  
KYOHEI NAKANO ◽  
ROBERT EDER ◽  
YUKINORI OHTA
Keyword(s):  
Single Particle ◽  
Double Exchange ◽  
Exchange Interactions ◽  
Exchange Model ◽  
Particle Spectrum ◽  
Lower Edge ◽  
One Dimensional ◽  
Mobile Electron ◽  
Spin Excitations ◽  
The One

We study the one-dimensional double-exchange model with L localized spins and one mobile electron. We solve the Schrödinger equation analytically and obtain the energies and wavefunctions for all the eigenstates with spin S = (l-1)/2 exactly. As an application, we compute the single-particle Green's function. We show that, for vanishing exchange interactions between localized spins, the single-particle spectrum is entirely incoherent and the lowest band has an infinite band mass, i.e., the single electron is localized due to its interaction with the spin excitations. For nonvanishing exchange interactions between localized spins, the lower edge of the spectrum acquires a dispersion but the spectrum remains incoherent with no well-defined quasiparticle peak.

Particle-hole excitations with a complete single-particle basis

1968 ◽  
Vol 49 (3) ◽  
pp. 445-476 ◽  
Author(s):  
A Agodi ◽  
F Catara ◽  
M Di Toro
Keyword(s):  
Single Particle ◽  
Single Particle Basis
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