Intermediate-coupling theory for the spectral weight of a spin polaron

Min Fong Yang*

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

4 引文 斯高帕斯(Scopus)

摘要

Within the intermediate-coupling theory, the quasiparticle weight Z of one hole injected into the undoped antiferromagnetic ground state is studied. We find that, for the hole located at the quasiparticle band minimum with momentum (Formula presented)=(±π/2,±π/2), Z is finite. By comparing the results obtained by the self-consistent Born approximation, we show that the intermediate-coupling theory for Z is appropriate only when J/t≳1.6. Finally, the reason why this approach fails in the small-J case will also be clarified.

原文英語
頁(從 - 到)56-58
頁數3
期刊Physical Review B - Condensed Matter and Materials Physics
55
發行號1
DOIs
出版狀態已出版 - 1997

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