Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities
We present an exact theory that describes how magnetic impurities change the behavior of the thermal conductivity for the integrable Heisenberg antiferromagnetic quantum spin-1/2 chain. Single magnetic impurities and a large concentration of impurities with similar values of the couplings to the h...
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| Опубліковано в: : | Физика низких температур |
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| Дата: | 2008 |
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| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
2008
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| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/116849 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities / A.A. Zvyagin // Физика низких температур. — 2008. — Т. 34, № 3. — С. 273–277. — Бібліогр.: 15 назв. — англ. |
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Zvyagin, A.A. 2017-05-16T19:12:30Z 2017-05-16T19:12:30Z 2008 Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities / A.A. Zvyagin // Физика низких температур. — 2008. — Т. 34, № 3. — С. 273–277. — Бібліогр.: 15 назв. — англ. 0132-6414 PACS: 75.10.Jm;71.10–w;72.10.Di;72.15.Eb https://nasplib.isofts.kiev.ua/handle/123456789/116849 We present an exact theory that describes how magnetic impurities change the behavior of the thermal conductivity for the integrable Heisenberg antiferromagnetic quantum spin-1/2 chain. Single magnetic impurities and a large concentration of impurities with similar values of the couplings to the host chain (a weak disorder) do not change the linear-in-temperature low-T behavior of the thermal conductivity: Only the slope of that behavior becomes smaller, comparing to the homogeneous case. The strong disorder in the distribution of the impurity-host couplings produces more rapid temperature growth of the thermal conductivity, compared to the linear in T dependence of the homogeneous chain and the chain with a weak disorder. Recent experiments on the thermal conductivity in inhomogeneous quasi-one-dimensional quantum spin systems manifest qualitative agreement with our results. The financial support from Deutsche Forschungsgemeinschaft (Grant No 436 UKR 17/21/06) is acknowledged. Stimulating discussions with B. Buchner, C. Hess, S.-L. Drechsler, V. Kataev, and P. Ribeiro are greatly appreciated en Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України Физика низких температур Низкоразмерные и неупорядоченные системы Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| spellingShingle |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities Zvyagin, A.A. Низкоразмерные и неупорядоченные системы |
| title_short |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| title_full |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| title_fullStr |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| title_full_unstemmed |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| title_sort |
thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities |
| author |
Zvyagin, A.A. |
| author_facet |
Zvyagin, A.A. |
| topic |
Низкоразмерные и неупорядоченные системы |
| topic_facet |
Низкоразмерные и неупорядоченные системы |
| publishDate |
2008 |
| language |
English |
| container_title |
Физика низких температур |
| publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України |
| format |
Article |
| description |
We present an exact theory that describes how magnetic impurities change the behavior of the thermal
conductivity for the integrable Heisenberg antiferromagnetic quantum spin-1/2 chain. Single magnetic impurities
and a large concentration of impurities with similar values of the couplings to the host chain (a weak
disorder) do not change the linear-in-temperature low-T behavior of the thermal conductivity: Only the slope
of that behavior becomes smaller, comparing to the homogeneous case. The strong disorder in the distribution
of the impurity-host couplings produces more rapid temperature growth of the thermal conductivity,
compared to the linear in T dependence of the homogeneous chain and the chain with a weak disorder. Recent
experiments on the thermal conductivity in inhomogeneous quasi-one-dimensional quantum spin systems
manifest qualitative agreement with our results.
|
| issn |
0132-6414 |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/116849 |
| citation_txt |
Thermal conductivity of a quantum spin-1/2 antiferromagnetic chain with magnetic impurities / A.A. Zvyagin // Физика низких температур. — 2008. — Т. 34, № 3. — С. 273–277. — Бібліогр.: 15 назв. — англ. |
| work_keys_str_mv |
AT zvyaginaa thermalconductivityofaquantumspin12antiferromagneticchainwithmagneticimpurities |
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2025-12-07T18:28:10Z |
| last_indexed |
2025-12-07T18:28:10Z |
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1850875147086462976 |