Ivanov, N.B., Schnack, J., Schnalle, R., Richter, J., Kogerler, P., Newton, G., Cronin, L. , Oshima, Y. and Nojiri, H. (2010) Heat capacity reveals the physics of a frustrated spin tube. Physical Review Letters, 105(3), 037206. (doi: 10.1103/PhysRevLett.105.037206)
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Abstract
We report on theoretical and experimental results concerning the low-temperature specific heat of the frustrated spin-tube material [(CuCl(2)tachH)(3)Cl]Cl-2 (tach denotes 1,3,5-triaminocyclohexane). This substance turns out to be an unusually perfect spin-tube system which allows to study the physics of quasione- 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, around 2 K the composite spin structure of the chain is revealed through a Schottky-type peak in the specific heat. 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.
Item Type: | Articles |
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Keywords: | ANTIFERROMAGNETIC UNIFORM BEHAVIOR HEISENBERG CHAIN LOW-TEMPERATURE NANOTUBES STATE SYSTEMS THERMODYNAMICS |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Cronin, Professor Lee |
Authors: | Ivanov, N.B., Schnack, J., Schnalle, R., Richter, J., Kogerler, P., Newton, G., Cronin, L., Oshima, Y., and Nojiri, H. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Physical Review Letters |
Publisher: | American Physical Society |
ISSN: | 0031-9007 |
ISSN (Online): | 1079-7114 |
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