Special Issue on Simulations of Complex Behavior from Simple Models; Guest Editors: D. P. Landau and Y. OkabeNo Access

QUANTUM PHASE TRANSITION OF A TRIANGULAR LATTICE SPIN TUBE AND EDGE SPIN EFFECTS

KOUICHI OKUNISHI

Department of Physics, Niigata University, Igarashi2 Niigata 950-2181, Japan

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SHIN-ICHIRO YOSHIKAWA

Department of Applied Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

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TÔRU SAKAI

Japan Atomic Energy Agency (JAEA), Spring-8, Hyogo 679-8551, Japan

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, and

SEIJI MIYASHITA

Department of Physics, University of Tokyo, 7-3-1 Honogo, Bunkyo-ku Tokyo 113-0033, Japan

CREST, JST, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan

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https://doi.org/10.1142/S0129183109014485Cited by:2 (Source: Crossref)

Abstract

We study the low-energy excitation of the quantum spin tube with the triangular lattice structure, using density matrix renormalization group. Taking account of the edge spin effect, we particularly investigate the spin gap behavior and the low-field magnetization curve near the quantum phase transition point in contrast with the usual free boundary condition. We then find that the bulk behavior of the spin tube can be extracted easier for the single spin termination.

Keywords:

PACS: 11.25.Hf, 123.1K

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