Direct observation of magnon fractionalization in the quantum spin ladder.
Direct observation of magnon fractionalization in the quantum spin ladder.
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DOI：
10.1103/physrevlett.102.107204
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发表时间：
2008-12
影响因子：
8.6
通讯作者：
B. Thielemann;C. Rüegg;H. Rønnow;A. Läuchli;J. Caux;B. Normand;D. Biner;K. Krämer;H. Güdel;J. Stahn;K. Habicht;K. Kiefer;M. Boehm;D. McMorrow;J. Mésot
中科院分区：
文献类型：
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作者：
B. Thielemann;C. Rüegg;H. Rønnow;A. Läuchli;J. Caux;B. Normand;D. Biner;K. Krämer;H. Güdel;J. Stahn;K. Habicht;K. Kiefer;M. Boehm;D. McMorrow;J. Mésot
用非弹性中子散射方法测量了量子自旋梯材料（C_5H_（12）N）_2CuBr_4的自旋激发谱随外加磁场的变化。离散磁振子模式在低场的量子无序相和在高场的饱和相对比鲜明的自旋连续在中间领域的特征的Luttinger液相。通过调整磁场，我们驱动的磁振子到自旋子的分馏，并在此解除限制制度，观察公度和非公度连续。
We measure by inelastic neutron scattering the spin excitation spectra as a function of applied magnetic field in the quantum spin-ladder material (C5H12N)2CuBr4. Discrete magnon modes at low fields in the quantum disordered phase and at high fields in the saturated phase contrast sharply with a spinon continuum at intermediate fields characteristic of the Luttinger-liquid phase. By tuning the magnetic field, we drive the fractionalization of magnons into spinons and, in this deconfined regime, observe both commensurate and incommensurate continua.