Validity of t–J approximation for extended Hubbard model with strong repulsion

Validity of t–J approximation for extended Hubbard model with strong repulsion

Cheranovskii, V.O. ; Klein, D.J. ; Ezerskaya, E.V. ; Tokarev, V.V.

Тема: Специальный выпуск К 80-летию со дня рождения А.И. Звягина

Інший ID: PACS: 75.10.Jm, 75.40.Сx.

URI: http://dspace.nbuv.gov.ua/handle/123456789/176241

Посилання: Validity of t–J approximation for extended Hubbard model with strong repulsion / V.O. Cheranovskii, D.J. Klein, E.V. Ezerskaya, V.V. Tokarev// Физика низких температур. — 2018. — Т. 44, № 11. — С. 1622-1625. — Бібліогр.: 10 назв. — англ.

Підтримка: VOC acknowledges the support of the VolkswagenStiftung, Germany (via grant 151110). DJK acknowledges the support of the Welch Foundation of Houston, Texas (via grant BD-0894).

Дата: 2018

Завантажень: 167

Validity of t–J approximation for extended Hubbard model with strong repulsion

Анотація:

It is shown that for finite cyclic systems described by two band Hubbard Hamiltonian with strong electron repulsion the reduction to effective t–J model may give incorrect description of the ground state symmetry due to neglect of the correlated hopping terms.

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