Магнетокалоричний ефект у спін-1/2 одновимірній XX моделі з двома регулярнозмінними g-факторами
The influence of a non-uniformity of the g-factors with period two on the magnetocaloric effect in the spin-1/2 XX chain in the transverse field has been studied. By means of the Jordan–Wigner transformation, the problem is reduced to the Hamiltonian of noninteracting spinless fermions and solved ex...
Збережено в:
| Видавець: | Publishing house "Academperiodika" |
|---|---|
| Дата: | 2023 |
| Автор: | |
| Формат: | Стаття |
| Мова: | English Ukrainian |
| Опубліковано: |
Publishing house "Academperiodika"
2023
|
| Теми: | |
| Онлайн доступ: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2023076 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
Організація
Ukrainian Journal of Physics| Резюме: | The influence of a non-uniformity of the g-factors with period two on the magnetocaloric effect in the spin-1/2 XX chain in the transverse field has been studied. By means of the Jordan–Wigner transformation, the problem is reduced to the Hamiltonian of noninteracting spinless fermions and solved exactly. The variation of isentropes and the field dependences of the magnetic Gruneisen ratio with a change in the ratio g2/g1 are analyzed. Main attention is paid to the low-temperature region. Distinctions among the magnetocaloric effect manifestations in the cases where the g-factors have different or identical signs, or if either of g-factors equals zero, are demonstrated. |
|---|