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Title

Electron Spin Resonance in Quasi-One-Dimensional Quantum Antiferromagnets: Relevance of Weak Interchain Interactions

Authors
Sato, Masahiro
Published in Journal of the Physical Society of Japan. 2015, vol. 84, no. 3, p. 033704
Abstract We discuss universal features on the electron spin resonance (ESR) of a temperature-induced Tomonaga–Luttinger liquid phase in a wide class of weakly coupled S = 1/2 antiferromagnetic spin chains such as spin ladders, spin tubes and three-dimensionally coupled spin chains. We show that the ESR linewidth of various coupled chains increases with lowering temperature while the linewidth of a single spin chain is typically proportional to temperature. This broadening with lowering temperature is attributed to anisotropic interchain interactions and has been indeed observed in several kinds of three-dimensional (3D) magnets of weakly coupled spin chains above the 3D ordering temperature. We demonstrate that our theory can account for anomalous behaviors of the linewidths in an S = 1/2 four-leg spin tube compound Cu2Cl4∙H8C4SO2 (abbreviated to Sul-Cu2Cl4) and a three-dimensionally coupled S = 1/2 spin chain compound CuCl2∙2NC5H5.
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Research group Groupe Giamarchi
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FURUYA, Shunsuke, SATO, Masahiro. Electron Spin Resonance in Quasi-One-Dimensional Quantum Antiferromagnets: Relevance of Weak Interchain Interactions. In: Journal of the Physical Society of Japan, 2015, vol. 84, n° 3, p. 033704. https://archive-ouverte.unige.ch/unige:46711

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Deposited on : 2015-02-17

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