NMR Relaxation Rate of (quasi-)One-Dimensional Spin-Gapped Systems in Magnetic Fields : Condensed Matter: Electronic Properties, etc.
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概要
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The NMR relaxation rates of (quasi-)one-dimensional spin-gapped systems such as the S = 1/2 spin ladder with a diagonal interaction and the Haldane-gap system are investigated at low temperatures in magnetic fields. We show that in the regime where the gap is collapsed by magnetic fields, the NMR relaxation rate diverges with decreasing temperature and its exponent shows a behavior characteristic of the model as a function of the magnetic field. We discuss our results and compare them with recent experimental findings for the spin ladder system Cu_2(C_5H_<12>N_2)_2Cl_4 and for the Haldane-gap system (CH_3)_4NNi(NO_2)_3.
- 社団法人日本物理学会の論文
- 2000-08-15
著者
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Suga Sei-ichiro
Department Of Applied Physics Osaka University
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HAGA Nobuyasu
Department of Applied Physics, Faculty of Engineering, Osaka University
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Haga Nobuyasu
Department Of Applied Physics Faculty Of Engineering Osaka University
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