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Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study

Pal, Prabir LU ; Dalai, M. K. and Ulfat, Intikhab LU (2011) In Surface Science 605(9-10). p.875-877
Abstract
The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in... (More)
The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in the surface of the Pr0.5Sr0.5MnO3 samples. (C) 2011 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electronic structure, Photoemission, Colossal magnetoresistance
in
Surface Science
volume
605
issue
9-10
pages
875 - 877
publisher
Elsevier
external identifiers
  • wos:000290050600006
  • scopus:79953304024
ISSN
0039-6028
DOI
10.1016/j.susc.2011.01.031
language
English
LU publication?
yes
id
7f467178-b8ca-4a3d-8868-5b7b525b72d3 (old id 1964181)
date added to LUP
2011-05-24 07:52:03
date last changed
2017-01-01 05:35:38
@article{7f467178-b8ca-4a3d-8868-5b7b525b72d3,
  abstract     = {The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in the surface of the Pr0.5Sr0.5MnO3 samples. (C) 2011 Elsevier B.V. All rights reserved.},
  author       = {Pal, Prabir and Dalai, M. K. and Ulfat, Intikhab},
  issn         = {0039-6028},
  keyword      = {Electronic structure,Photoemission,Colossal magnetoresistance},
  language     = {eng},
  number       = {9-10},
  pages        = {875--877},
  publisher    = {Elsevier},
  series       = {Surface Science},
  title        = {Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study},
  url          = {http://dx.doi.org/10.1016/j.susc.2011.01.031},
  volume       = {605},
  year         = {2011},
}