Abstract
We carry out extensive first-principles doping-dependent computations of angle-resolved photoemission (ARPES) intensities in La₂₋ₓSrₓCuO₄ over a wide range of binding energies. Intercell hopping and the associated three dimensionality, which is usually neglected in discussing cuprate physics, is shown to play a key role in shaping the ARPES spectra. Despite the obvious importance of strong coupling effects (e.g., the presence of a lower Hubbard band coexisting with midgap states in the doped insulator), a number of salient features of the experimental ARPES spectra are captured to a surprising extent when kz dispersion is properly included in the analysis.
Keywords
angle-resolved photoemission, ARPES, midgap states, residual three dimensionality, La₂₋ₓSrₓCuO₄
Subject Categories
Photoemission
Disciplines
Physics
Publisher
American Physical Society
Publication Date
10-5-2005
Rights Information
Copyright 2005 American Physical Society.
Rights Holder
American Physical Society
Recommended Citation
Sahrakorpi, S.; Lindroos, M.; Markiewicz, R. S.; and Bansil, A., "Evolution of midgap states and residual three dimensionality in La₂₋ₓSrₓCuO₄" (2005). Physics Faculty Publications. Paper 381.
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Notes
Originally published in Physical Review Letters v. 95 (2005): DOI: 10.1103/PhysRevLett.95.157601