Evidence of Electron Fractionalization from Photoemission Spectra in the High Temperature Superconductors

Details Evidence of Electron Fractionalization from Photoemission Spectra in the High Temperature Superconductors Evidence of Electron Fractionalization from Photoemission Spectra in the High Temperature Superconductors

2000-05-26

arxiv.org/abs/cond-mat/0005457v2

Phys. Rev. Lett. 86, 4362 (2001)

Physics

Condensed Matter

Superconductivity

Published version

Scientific paper

10.1103/PhysRevLett.86.4362

In the normal state of the high temperature superconductors Bi_2Sr_2CaCu_2O_{8+delta} and La_{2-x}Sr_{x}CuO_4, and in the related ``stripe ordered'' material La_1.25Nd_0.6Sr_0.15CuO_4, there is sharp structure in the measured single hole spectral function A(k,w) considered as a function of k at fixed small binding energy w. At the same time, as a function of w at fixed k on much of the putative Fermi surface, any structure in A(k,w), other than the Fermi cutoff, is very broad. This is characteristic of the situation in which there are no stable excitations with the quantum numbers of the electron, as is the case in the one dimensional electron gas.

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