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Title: A universal high energy anomaly in angle resolved photoemissionspectra of high temperature superconductors -- possible evidence ofspinon and holon branches

Abstract

A universal high energy anomaly in the single particlespectral function is reported in three different families of hightemperature superconductors by using angle-resolved photoemissionspectroscopy. As we follow the dispersing peak of the spectral functionfrom the Fermi energy to the valence band complex, we find dispersionanomalies marked by two distinctive high energy scales, E_1 approx 0.38eV and E_2 approx 0.8 eV. E_1 marks the energy above which the dispersionsplits into two branches. One is a continuation of the near parabolicdispersion, albeit with reduced spectral weight, and reaches the bottomof the band at the Gamma point at approx 0.5 eV. The other is given by apeak in the momentum space, nearly independent of energy between E_1 andE_2. Above E_2, a band-like dispersion re-emerges. We conjecture thatthese two energies mark the disintegration of the low energyquasiparticles into a spinon and holon branch in the high T_c cuprates.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director. Office of Science. Office of AdvancedScientific Computing Research. Office of Basic Energy Sciences. MaterialsSciences and Engineering Division; National Science Foundation GrantDMR-0349361
OSTI Identifier:
902146
Report Number(s):
LBNL-62145
R&D Project: 507501; BnR: KC0202020; TRN: US0702797
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letter; Journal Volume: 98; Related Information: Journal Publication Date: 02/2007
Country of Publication:
United States
Language:
English
Subject:
75; CUPRATES; PHOTOEMISSION; SPECTRA; SPECTRAL FUNCTIONS; SPECTROSCOPY; SUPERCONDUCTORS; VALENCE

Citation Formats

Graf, J., Gweon, G.-H., McElroy, K., Zhou, S.Y., Jozwiak, C., Rotenberg, E., Bill, A., Sasagawa, T., Eisaki, H., Uchida, S., Takagi,H., Lee, D.-H., and Lanzara A. A universal high energy anomaly in angle resolved photoemissionspectra of high temperature superconductors -- possible evidence ofspinon and holon branches. United States: N. p., 2006. Web.
Graf, J., Gweon, G.-H., McElroy, K., Zhou, S.Y., Jozwiak, C., Rotenberg, E., Bill, A., Sasagawa, T., Eisaki, H., Uchida, S., Takagi,H., Lee, D.-H., & Lanzara A. A universal high energy anomaly in angle resolved photoemissionspectra of high temperature superconductors -- possible evidence ofspinon and holon branches. United States.
Graf, J., Gweon, G.-H., McElroy, K., Zhou, S.Y., Jozwiak, C., Rotenberg, E., Bill, A., Sasagawa, T., Eisaki, H., Uchida, S., Takagi,H., Lee, D.-H., and Lanzara A. Tue . "A universal high energy anomaly in angle resolved photoemissionspectra of high temperature superconductors -- possible evidence ofspinon and holon branches". United States. doi:. https://www.osti.gov/servlets/purl/902146.
@article{osti_902146,
title = {A universal high energy anomaly in angle resolved photoemissionspectra of high temperature superconductors -- possible evidence ofspinon and holon branches},
author = {Graf, J. and Gweon, G.-H. and McElroy, K. and Zhou, S.Y. and Jozwiak, C. and Rotenberg, E. and Bill, A. and Sasagawa, T. and Eisaki, H. and Uchida, S. and Takagi,H. and Lee, D.-H. and Lanzara A.},
abstractNote = {A universal high energy anomaly in the single particlespectral function is reported in three different families of hightemperature superconductors by using angle-resolved photoemissionspectroscopy. As we follow the dispersing peak of the spectral functionfrom the Fermi energy to the valence band complex, we find dispersionanomalies marked by two distinctive high energy scales, E_1 approx 0.38eV and E_2 approx 0.8 eV. E_1 marks the energy above which the dispersionsplits into two branches. One is a continuation of the near parabolicdispersion, albeit with reduced spectral weight, and reaches the bottomof the band at the Gamma point at approx 0.5 eV. The other is given by apeak in the momentum space, nearly independent of energy between E_1 andE_2. Above E_2, a band-like dispersion re-emerges. We conjecture thatthese two energies mark the disintegration of the low energyquasiparticles into a spinon and holon branch in the high T_c cuprates.},
doi = {},
journal = {Physical Review Letter},
number = ,
volume = 98,
place = {United States},
year = {Tue Dec 19 00:00:00 EST 2006},
month = {Tue Dec 19 00:00:00 EST 2006}
}