Gauge invariance and electron spectral functions in underdoped cuprates

Details Gauge invariance and electron spectral functions in underdoped cuprates Gauge invariance and electron spectral functions in underdoped cuprates

2001-05-28

arxiv.org/abs/cond-mat/0105540v2

Physics

Condensed Matter

Strongly Correlated Electrons

19 pages. RevTeX4. Submitted to PRB. Homepage: http://dao.mit.edu/~wen

Scientific paper

The single particle spectral function for the normal state of underdoped high $T_c$ cuprates is studied within the slave particle framework. We find that the presence of a massless dynamical gauge field - a direct consequence of the quantum order - explains the broad, but not totally incoherent, line-shapes observed in experiments. The issue of the negative anomalous dimension of a recently proposed gauge invariant single particle amplitude is also considered. We show how the anomalous behavior of the single particle amplitude can be incorporated within the slave particle approach and, thus reinterpreted, lead to physical phenomenology.

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