Spectra of the high Tc cuprates understood by the variational studies of the t–J-type models

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题名:	Spectra of the high Tc cuprates understood by the variational studies of the t–J-type models
作者:	何昌明
贡献者:	淡江大學物理學系
日期:	2005-11-22
上传时间:	2011-10-23 18:55:31 (UTC+8)
摘要:	Trial wavefunctions with and without antiferromagnetic order for the 2-dimensional t–J-type model are proposed to describe the low-energy states of high Tc cuprates with doped holes or electrons. In the slightly doping regime, we found states behaving like charged quasi-particles with well-defined momenta and having much less pairing correlations than previously studied ones. There exist also states showing the incoherent and ‘spin-bag’ behaviors. Our results are supported by exact calculation and are consistent with recent photoemission experiments. With increasing doping, superconducting states emerge and behave similarly with that described in recent band-structure analysis and seen in various materials.
關聯:	7th International Conference on Spectroscopies in Novel Superconductorsm, Spain
DOI:	10.1016/j.jpcs.2005.10.049
显示于类别:	[物理學系暨研究所] 會議論文

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