Spin dynamics of S = 1/2 Heisenberg chains with a staggered transverse field: electron spin resonance studies (Review Article)
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Spin dynamics of S = 1/2 Heisenberg chains with a staggered transverse field: electron spin resonance studies (Review Article)
|
|
| Creator |
Zvyagin, S.A.
|
|
| Subject |
К 80-летию Виктора Валентиновича Еременко
|
|
| Description |
In this article I review recent achievements on experimental studies of magnetic excitations in the copper pyrimidine dinitrate [PM–Cu(NO₃ )₂ (H ₂O) ₂ ]n (PM = pyrimidine), an S = 1/2 antiferromagnetic chain material with alternating g-tensor and the Dzyaloshinskii–Moriya interaction, by means of high-field electron spin resonance (ESR). Due to this alternation, in the 1D critical regime this material exhibits a field-induced gap. The excitation spectrum is formed by solitons and their bound states, breathers, and can be effectively described using the sine-Gordon model. With increasing temperature, the soliton-breather regime can be suppressed, resulting in a substantial evolution of ESR parameters. These changes can be described using a new theoretical concept recently proposed for S =1/2 AF chains with a staggered transverse field. High magnetic field induces a transition into spin-polarized state with the excitation spectrum formed by magnons. Nonmonotonous behavior of the field-induced gap is observed in the vicinity of saturation field. The experimental data are compared with results of existing theoretical approaches, revealing an excellent agreement with the predictions. |
|
| Date |
2017-05-25T16:57:25Z
2017-05-25T16:57:25Z 2012 |
|
| Type |
Article
|
|
| Identifier |
Spin dynamics of S = 1/2 Heisenberg chains with a staggered transverse field: electron spin resonance studies (Review Article) / S.A. Zvyagin // Физика низких температур. — 2012. — Т. 38, № 9. — С. 1032–1040. — Бібліогр.: 37 назв. — англ.
0132-6414 PACS: 75.40.Gb, 76.30.–v, 75.10.Jm http://dspace.nbuv.gov.ua/handle/123456789/117611 |
|
| Language |
en
|
|
| Relation |
Физика низких температур
|
|
| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
|
|