تقرير
Heat capacity uncovers physics of a frustrated spin tube
| العنوان: | Heat capacity uncovers physics of a frustrated spin tube |
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| المؤلفون: | Ivanov, N. B., Schnack, J., Schnalle, R., Richter, J., Koegerler, P., Newton, G. N., Cronin, L., Oshima, Y., Nojiri, Hiroyuki |
| المصدر: | Phys. Rev. Lett. 105 (2010) 037206 |
| سنة النشر: | 2010 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We report on refined experimental results concerning the low-temperature specific heat of the frustrated spin tube material [(CuCl2tachH)3Cl]Cl2. This substance turns out to be an unusually perfect spin tube system which allows to study the physics of quasi-one dimensional antiferromagnetic structures in rather general terms. An analysis of the specific heat data demonstrates that at low enough temperatures the system exhibits a Tomonaga-Luttinger liquid behavior corresponding to an effective spin-3/2 antiferromagnetic Heisenberg chain with short-range exchange interactions. On the other hand, at somewhat elevated temperatures the composite spin structure of the chain is revealed through a Schottky-type peak in the specific heat located around 2 K. We argue that the dominating contribution to the peak originates from gapped magnon-type excitations related to the internal degrees of freedom of the rung spins. Comment: 4+ pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.105.037206 |
| URL الوصول: | http://arxiv.org/abs/1004.2373 |
| رقم الأكسشن: | edsarx.1004.2373 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.105.037206 |
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