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Titolo:
Spin-polarization transition in the two-dimensional electron gas
Autore:
Varsano, D; Moroni, S; Senatore, G;
Indirizzi:
Univ Rome La Sapienza, INFM, I-00185 Rome, Italy Univ Rome La Sapienza Rome Italy I-00185 enza, INFM, I-00185 Rome, Italy Univ Trieste, Dipartimento Fis Teor, INFM, I-34014 Trieste, Italy Univ Trieste Trieste Italy I-34014 is Teor, INFM, I-34014 Trieste, Italy
Titolo Testata:
EUROPHYSICS LETTERS
fascicolo: 3, volume: 53, anno: 2001,
pagine: 348 - 353
SICI:
0295-5075(20010201)53:3<348:STITTE>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
METAL-INSULATOR-TRANSITION; QUANTUM MONTE-CARLO; LOCAL-FIELD CORRECTIONS; GROUND-STATE; SYSTEMS; LIQUIDS; PHASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Varsano, D Univ Rome La Sapienza, INFM, P Aldo Moro 2, I-00185 Rome, ItalyUniv Rome La Sapienza P Aldo Moro 2 Rome Italy I-00185 , Italy
Citazione:
D. Varsano et al., "Spin-polarization transition in the two-dimensional electron gas", EUROPH LETT, 53(3), 2001, pp. 348-353

Abstract

We present a numerical study of magnetic phases of the 2D electron gas near freezing. The calculations are performed by diffusion;Monte Carlo in the fu;ed-node approximation. At variance with the 3D case we find no evidence for the stability of a partially polarized phase. With plane wave nodes in the trial function, the polarization transition takes place at r(s) = 20, whereas the best available estimates locate Wigner crystallization around r(s) = 35. Using an improved nodal structure. featuring optimized backflow correlations. we confirm the existence of a stability range for the polarizedphase, although somewhat shrunk, at densities achievable nowadays in 2-dimensional hole gases in semiconductor heterostructures. The spin susceptibility of the unpolarized phase at the magnetic transition is approximately 30times the Pauli susceptibility.

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Documento generato il 26/11/20 alle ore 11:42:11