Particle-Hole Asymmetry in Doped Mott Insulators: Implications for Tunneling and Photoemission Spectroscopies
Loading...
Date
2005-09-19
Journal Title
Journal ISSN
Volume Title
Publisher
American Physical Society
Abstract
We use exact sum rules for the one-particle spectral function to quantify the idea that it is more difficult to add an electron than to extract one in a system with strong local repulsion. Our results explain the striking asymmetry in the tunneling spectra of underdoped cuprates which increases with underdoping. We also propose a novel method, based on ratios of sum rules, to estimate local density variations in inhomogeneous materials. Using a variational approach, we show that the origin of the particle-hole asymmetry lies in the incoherent spectral weight.
Description
Keywords
Citation
Mohit Randeria et al, "Particle-Hole Asymmetry in Doped Mott Insulators: Implications for Tunneling and Photoemission Spectroscopies," Physical Review Letters 95, no. 13 (2005), doi:10.1103/PhysRevLett.95.137001