Two holes in the t-J model form a bound state for any nonzero J/t

Vidmar, Lev (avtor), Bonča, Janez (avtor)

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
• COBISS.SI-ID: 2548324
• Skupna ocena: (0 glasov)
• Vaša ocena: Ocenjevanje je dovoljeno samo prijavljenim uporabnikom.
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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