Gapped Ground State in the Spin-½ Trimer Chain System Cu3Cl6(H2O)2·2H8C4SO2

Gapped Ground State in the Spin-½ Trimer Chain System Cu3Cl6(H2O)2·2H8C4SO2

The magnetic susceptibility and magnetization curves of an S=½ trimer spin chain system Cu3Cl6(H2O)2·2H8C4SO2 have been measured using single crystals and polycrystals. It was found that the ground state at zero-field is a spin singlet with an excitation gap. This result suggests that the translatio...

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Bibliographic Details
Published in:Journal of the Physical Society of Japan Vol. 69; no. 2; p. 340
Main Authors: Ishii, Mariko, Tanaka, Hidekazu, Hori, Mikiko, Uekusa, Hidehiro, Ohashi, Yuji, Tatani, Keiji, Narumi, Yasuo, Kindo, Koichi
Format: Journal Article
Language:English
Published: Tokyo The Physical Society of Japan 01-02-2000
Online Access:Get full text
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Summary:The magnetic susceptibility and magnetization curves of an S=½ trimer spin chain system Cu3Cl6(H2O)2·2H8C4SO2 have been measured using single crystals and polycrystals. It was found that the ground state at zero-field is a spin singlet with an excitation gap. This result suggests that the translational symmetry of the Hamiltonian is spontaneously broken in the ground state. A model for the ground state is proposed. The magnetization curve measured at 0.08 K for polycrystals shows that the gap closes at Hc [approximate] 3.9 T, from which the magnitude of the gap is evaluated as δ /kB[approximate]5.2 K.
ISSN:0031-9015
1347-4073