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001-es BibID:	BIBFORM085237
Első szerző:	Gulácsi Zsolt (fizikus)
Cím:	Exact ground state for the generic periodic Anderson model around half-filling / Zsolt Gulácsi
Dátum:	2004
ISSN:	0950-0839
Megjegyzések:	Explicitly given, exact, ground-state solutions are reported for the onedimensional periodic Anderson model in the limit of strong on-site repulsion, at and above half-filling, in the generic case of the model, for which f-electron hopping is forbidden. The description is presented for Bravais lattices, and the deduction procedure is based on decomposition of the starting Hamiltonian in positive semidefinite operators, which are defined as combinations of fermionic operators acting on the lattice sites of blocks. In comparison with the previously used procedures of this type, we use blocks greater than a unit cell, and a nonlinear combination of fermionic operators acting on the lattice sites. Based on such block operators, the previously known exact, ground-state solution possibilities at one-quarter and three-quarter filling have been extended to halffilling. The deduced ground state is present in restricted regions of the T?0 phase diagram of the model, and is a spin-singlet conducting state.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Philosophical Magazine Letters. - 84 : 6 (2004), p. 405-410. -
Pályázati támogatás:	T-037212 OTKA
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
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