Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
On spectral properties of the uniaxially anisotropic Heisenberg Hamiltonian
Репозиторій DSpace/Manakin
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On spectral properties of the uniaxially anisotropic Heisenberg Hamiltonian
Тема:
Кpаткие сообщения
УДК:
537.6
Посилання:
On spectral properties of the uniaxially anisotropic Heisenberg Hamiltonian / I.V. Krasovsky // Физика низких температур. — 1995. — Т. 21, № 3. — С. 331-332. — Бібліогр.: 3 назв. — англ.
Підтримка:
The author wishes to thank V. I. Peresada and A. A. Zvyagin for valuable discussions.
This article was translated by the author and edited by Dr. R. Beyer.
Дата:
1995
Переглядів:
291
Завантажень:
142
Анотація:
The uniaxially anisotropic Heisenberg Hamiltonian H is considered, which describes a simple lattice of spins and incorporates first-nearest, ..., m-nearest neighbour interactions under the condition that Jjαj ≥ 0, j = 1, ..., m, where Jj, αj are the exchange and anisotropy constants of the j-th shell of neighbours, respectively. It is proved that, there are no bound states in the two-magnon space above the band of the continuous spectrum of H and, for the XY model, there are no two-magnon bound states at all.
