淡江大學機構典藏:Item 987654321/27870
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    题名: Low-Energy Spectra in t-J-Type Models at Low Doping Levels
    作者: Lee, W. C.,;Lee, T. K.;Ho, Chang-ming;Leung, P. W.
    贡献者: 淡江大學物理學系
    日期: 2003-08
    上传时间: 2013-07-09 15:22:35 (UTC+8)
    出版者: College Park: American Physical Society
    摘要: Based on a variational approach, we propose that there are two kinds of low-energy states in the t-J-type models at low doping. In a quasiparticle state an unpaired spin bound to a hole with a well-defined momentum can be excited with spin waves. The resulting state shows a suppression of antiferromagnetic order around the hole with the profile of a spin bag. These spin-bag states with spin and charge or hole separated form a continuum of low-energy excitations. Very different properties predicted by these two kinds of states explain a number of anomalous results observed in the exact diagonalization studies on small clusters up to 32 sites.
    關聯: Physical Review Letters 91(5), pp.57001-57004
    DOI: 10.1103/PhysRevLett.91.057001
    显示于类别:[物理學系暨研究所] 期刊論文

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