Specific Heat of the Spin-1/2 Dimerized Antiferromagnetic Chains at Low Temperatures
| Autor: | V. L. Katkov |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Coupling constant
Physics Nuclear and High Energy Physics Radiation Specific heat Condensed matter physics Band gap 01 natural sciences Atomic and Molecular Physics and Optics 010305 fluids & plasmas 0103 physical sciences Antiferromagnetism Radiology Nuclear Medicine and imaging 010306 general physics |
| Zdroj: | Physics of Particles and Nuclei Letters. 15:668-672 |
| ISSN: | 1531-8567 1547-4771 |
| DOI: | 10.1134/s1547477118060109 |
| Popis: | A spin linear chain with antiferromagnetic nearest-neighbor interaction is considered. The coupling constants of each spin with the right and left neighbors are different. Within the Bulaevskii model, the magnetic specific heat is calculated as a function of temperature for different alternation parameters. It is shown that the temperature dependence of the specific heat has two regimes. In the first one, the temperature is lower than half the band gap; in this case, in the low-temperature limit, C ∝ T-1 exp(−Δ/kBT). In the second regime, the temperature exceeds half the band gap; in this case, we approximately have C ∝ T. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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