The square-kagome quantum Heisenberg antiferromagnet at high magnetic fields: the localized-magnon paradigm and beyond
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
The square-kagome quantum Heisenberg antiferromagnet at high magnetic fields: the localized-magnon paradigm and beyond
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| Creator |
Derzhko, O.
Richter, J. Krupnitska, O. Krokhmalskii, T. |
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| Subject |
Низкотемпеpатуpный магнетизм
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| Description |
We consider the spin-1/2 antiferromagnetic Heisenberg model on the two-dimensional square-kagome lattice with almost dispersionless lowest magnon band. For a general exchange coupling geometry we elaborate low-energy effective Hamiltonians which emerge at high magnetic fields. The effective model to describe the low-energy degrees of freedom of the initial frustrated quantum spin model is the (unfrustrated) square-lattice spin-1/2 XXZ model in a z-aligned magnetic field. For the effective model we perform quantum Monte Carlo simulations to discuss the low-temperature properties of the square-kagome quantum Heisenberg antiferromagnet at high magnetic fields. We pay special attention to a magnetic-field driven Berezinskii–Kosterlitz– Thouless phase transition which occurs at low temperatures.
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| Date |
2017-06-07T08:10:09Z
2017-06-07T08:10:09Z 2014 |
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| Type |
Article
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| Identifier |
The square-kagome quantum Heisenberg antiferromagnet at high magnetic fields: the localized-magnon paradigm and beyond / O. Derzhko, J. Richter, O. Krupnitska, T. Krokhmalskii // Физика низких температур. — 2014. — Т. 40, № 6. — С. 662-670. — Бібліогр.: 43 назв. — англ.
0132-6414 PACS 75.10.Jm http://dspace.nbuv.gov.ua/handle/123456789/119527 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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