Magnetocaloric effect in quantum spin-s chains
We compute the entropy of antiferromagnetic quantum spin-s chains in an external magnetic field using exact diagonalization and Quantum Monte Carlo simulations. The magnetocaloric effect, i. e., temperature variations during adiabatic field changes, can be derived from the isentropes. First, we fo...
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| Дата: | 2009 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2009
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119996 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Magnetocaloric effect in quantum spin-s chains / A. Honecker, S. Wessel // Condensed Matter Physics. — 2009. — Т. 12, № 3. — С. 399-410. — Бібліогр.: 55 назв. — англ. |
Репозиторії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1199962017-06-11T03:04:01Z Magnetocaloric effect in quantum spin-s chains Honecker, A. Wessel, S. We compute the entropy of antiferromagnetic quantum spin-s chains in an external magnetic field using exact diagonalization and Quantum Monte Carlo simulations. The magnetocaloric effect, i. e., temperature variations during adiabatic field changes, can be derived from the isentropes. First, we focus on the example of the spin- s = 1 chain and show that one can cool by closing the Haldane gap with a magnetic field. We then move to quantum spin-s chains and demonstrate linear scaling with s close to the saturation field. In passing, we propose a new method to compute many low-lying excited states using the Lanczos recursion. Ми обчислюємо ентропiю антиферомагнiтних квантових спiн-s ланцюжкiв у зовнiшньому магнiтному полi, використовуючи точну дiагоналiзацiю i квантове Монте Карло. Магнiтокалоричний ефект, тобто змiна температури при адiабатичних змiнах поля, може бути отриманий з iзентроп. Спочатку ми зосереджуємося на прикладi спiн-s = 1 ланцюжка i показуємо, що можна охолоджувати, закриваючи магнiтним полем щiлину Галдейна. Потiм ми переходимо до квантових спiн-s ланцюжкiв i демонструємо лiнiйний скейлiнг з s поблизу поля насичення. 2009 Article Magnetocaloric effect in quantum spin-s chains / A. Honecker, S. Wessel // Condensed Matter Physics. — 2009. — Т. 12, № 3. — С. 399-410. — Бібліогр.: 55 назв. — англ. 1607-324X PACS: 75.10.Pq, 75.30.Sg, 75.50.Ee, 02.70.-c DOI:10.5488/CMP.12.3.399 http://dspace.nbuv.gov.ua/handle/123456789/119996 en Condensed Matter Physics Інститут фізики конденсованих систем НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
We compute the entropy of antiferromagnetic quantum spin-s chains in an external magnetic field using exact
diagonalization and Quantum Monte Carlo simulations. The magnetocaloric effect, i. e., temperature variations
during adiabatic field changes, can be derived from the isentropes. First, we focus on the example of the spin-
s = 1 chain and show that one can cool by closing the Haldane gap with a magnetic field. We then move to
quantum spin-s chains and demonstrate linear scaling with s close to the saturation field.
In passing, we propose a new method to compute many low-lying excited states using the Lanczos recursion. |
| format |
Article |
| author |
Honecker, A. Wessel, S. |
| spellingShingle |
Honecker, A. Wessel, S. Magnetocaloric effect in quantum spin-s chains Condensed Matter Physics |
| author_facet |
Honecker, A. Wessel, S. |
| author_sort |
Honecker, A. |
| title |
Magnetocaloric effect in quantum spin-s chains |
| title_short |
Magnetocaloric effect in quantum spin-s chains |
| title_full |
Magnetocaloric effect in quantum spin-s chains |
| title_fullStr |
Magnetocaloric effect in quantum spin-s chains |
| title_full_unstemmed |
Magnetocaloric effect in quantum spin-s chains |
| title_sort |
magnetocaloric effect in quantum spin-s chains |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2009 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/119996 |
| citation_txt |
Magnetocaloric effect in quantum spin-s chains / A. Honecker, S. Wessel // Condensed Matter Physics. — 2009. — Т. 12, № 3. — С. 399-410. — Бібліогр.: 55 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
AT honeckera magnetocaloriceffectinquantumspinschains AT wessels magnetocaloriceffectinquantumspinschains |
| first_indexed |
2023-10-18T20:35:58Z |
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2023-10-18T20:35:58Z |
| _version_ |
1796150619685257216 |