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Prog. Theor. Phys. Supplement No.145 (2002) pp. 176-181

[ Full Text PDF : FREE ACCESS (151K) ]

Quantum Phase Competition in Antiferromagnetic Spin-1 Ladders

Shoji Yamamoto,1 Tôru Sakai2 and Akihisa Koga3

1Department of Physics, Okayama University, Okayama 700-8530, Japan
2Department of Electronics, Tokyo Metropolitan Institute of Technology, Hino 191-0065, Japan
3Department of Applied Physics, Osaka University, Suita 565-0871, Japan

(Received December 25, 2001)

Abstract:

Motivated by recent chemical explorations into organic-radical-based higher-spin ladder systems, we study the ground-state properties of a wide class of antiferromagnetic spin-1 ladders. Numerical analysis featuring the level-spectroscopy technique reveals the rich phase diagram, correcting a preceding nonlinear-sigma-model prediction. A variational analysis well interprets the phase competition with particular emphasis on the re-entrant phase boundary on the way from single to coupled chains.


URL : http://ptp.ipap.jp/link?PTPS/145/176/
DOI : 10.1143/PTPS.145.176

[ Full Text PDF : FREE ACCESS (151K) ] Citation:

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