izpis_h1_title_alt

Two holes in the t-J model form a bound state for any nonzero J/t
Vidmar, Lev (Avtor), Bonča, Janez (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://link.springer.com/article/10.1007%2Fs10948-013-2151-2 Novo okno

Izvleček
Determination of the parameter regime in which two holes in the ▫$t-J$▫ model form a bound state represents a long standing open problem in the field of strongly correlated systems. By applying and systematically improving the exact diagonalization method defined over a limited functional space (EDLFS), we show that the average distance between two holes scales as ▫$\langle d \rangle \sim 2(J/t)^{-1/4}$▫ for ▫$J/t < 0.15$▫, therefore, providing strong evidence that two holes in the ▫$t-J$▫ model form the bound state for any nonzero ▫$J/t$▫. However, the symmetry of such bound pair in the ground state is p-wave. This state is consistent with phase separation at finite hole filling, as observed recently in Phys. Rev. B 85, 245113 (2012).

Jezik:Angleški jezik
Ključne besede:strongly correlated systems, bound states, phase separation
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FMF - Fakulteta za matematiko in fiziko
Leto izida:2013
Št. strani:str. 2641-2645
Številčenje:Vol. 26, iss. 8
UDK:538.9
ISSN pri članku:1557-1939
DOI:10.1007/s10948-013-2151-2 Povezava se odpre v novem oknu
COBISS.SI-ID:2548324 Povezava se odpre v novem oknu
Število ogledov:251
Število prenosov:90
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Gradivo je del revije

Naslov:Journal of superconductivity and novel magnetism
Skrajšan naslov:J. supercond. nov. magn.
Založnik:Springer
ISSN:1557-1939
COBISS.SI-ID:21239847 Novo okno

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