Quantum phase transitions and thermodynamics of quantum antiferromagnets with competing interactions
We study the isotropic Heisenberg chain with nearest and next-nearest neighbor interactions. The ground state phase diagram is constructed in dependence on the additional interactions and an external magnetic field. The thermodynamics is studied by use of finite sets of nonlinear integral equations...
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Видавець: | Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
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Дата: | 2007 |
Автори: | , |
Формат: | Стаття |
Мова: | English |
Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2007
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Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/7712 |
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Цитувати: | Quantum phase transitions and thermodynamics of quantum antiferromagnets with competing interactions / Ch. Trippe, A. Klumper // Физика низких температур. — 2007. — Т. 33, № 11. — С. 1213-1221. — Бібліогр.: 14 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of UkraineРезюме: | We study the isotropic Heisenberg chain with nearest and next-nearest neighbor interactions. The ground state phase diagram is constructed in dependence on the additional interactions and an external magnetic field. The thermodynamics is studied by use of finite sets of nonlinear integral equations resulting from integrability. The equations are solved numerically and analytically in suitable limiting cases. We find second and first order transition lines. The exponents of the low-temperature asymptotics at the phase transitions are determined. |
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