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

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

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 strongly correlated systems, bound states, phase separation Delo ni kategorizirano (r6) 1.01 - Izvirni znanstveni članek FMF - Fakulteta za matematiko in fiziko 2013 str. 2641-2645 Vol. 26, iss. 8 538.9 1557-1939 10.1007/s10948-013-2151-2 2548324 586 234 (0 glasov) Ocenjevanje je dovoljeno samo prijavljenim uporabnikom. AddThis uporablja piškotke, za katere potrebujemo vaše privoljenje.Uredi privoljenje...

Naslov: Journal of superconductivity and novel magnetism J. supercond. nov. magn. Springer 1557-1939 21239847

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