基于重整化平均场理论,在二维空穴掺杂t-t′-J-U模型的框架下,用Gutzwiller平均场近似理论研究高温超导体的基态相图,分析了次近邻跃迁电子(t′)对电子平均双重占据数(d)的影响.发现在掺杂浓度δ≠0的掺杂Gossamer超导态,次近邻跃迁的引入使d的数值在欠掺杂浓度区增大,在过掺杂浓度区显著减少.
The effect of additional second?neighbor hopping(t′)on double occupation electrons(d)of superconductors was investigated with a renormalized mean field theory based on the Gutzwiller variational approach in the two dimensions hole?doped t?t′?J?U model. For the δ≠0 Gossamer superconductors,the d is slightly enhanced by t′in underdoped regions and greatly suppressed in overdoped regions.
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