Effect of nonlocal interactions on the disorder-induced zero-bias anomaly in the Anderson-Hubbard model

Hong Yi Chen, W. A. Atkinson, R. Wortis

研究成果: 雜誌貢獻期刊論文同行評審

4 引文 斯高帕斯(Scopus)

摘要

To expand the framework available for interpreting experiments on disordered strongly correlated systems, and in particular to explore further the strong-coupling zero-bias anomaly found in the Anderson-Hubbard model, we ask how this anomaly responds to the addition of nonlocal electron-electron interactions. We use exact diagonalization to calculate the single-particle density of states of the extended Anderson-Hubbard model. We find that for weak nonlocal interactions the form of the zero-bias anomaly is qualitatively unchanged. The energy scale of the anomaly continues to be set by an effective hopping amplitude renormalized by the nonlocal interaction. At larger values of the nonlocal interaction strength, however, hopping ceases to be a relevant energy scale and higher energy features associated with charge correlations dominate the density of states.

原文英語
文章編號235139
期刊Physical Review B - Condensed Matter and Materials Physics
85
發行號23
DOIs
出版狀態已發佈 - 2012 六月 21

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

指紋 深入研究「Effect of nonlocal interactions on the disorder-induced zero-bias anomaly in the Anderson-Hubbard model」主題。共同形成了獨特的指紋。

引用此