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Polarisation-dependent X-ray absorption in high- and low-Tc Bi2Sr2Can-1CunO4+2n superconductors

Qvarford, M.; Saini, N. L.; Andersen, J. N. LU ; Nyholm, R. LU ; Lundgren, E. LU ; Lindau, I. LU ; van Acker, J. F.; Leonyuk, L.; Söderholm, S. and Flodström, S. A. (1993) In Physica C: Superconductivity and its Applications 214(1-2). p.119-126
Abstract

Taking advantage of the linear polarisation of synchrotron radiation, the polarisation dependence of the O K and Cu L3 X-ray absorption edges has been compared for in situ cleaved Bi2Sr2CaCu2O8 and Bi2Sr2CuO6 single crystals. The X-ray absorption spectra were measured by means of total electron yield detection. The spectra show for both crystals that the lowest unoccupied Cu 3d and O 2p orbitals are dominantly oriented parallel to the a-b plane, but also the presence of a small amount of unoccupied orbitals oriented perpendicular to the a-b plane can be deduced from both the O K and Cu L3 absorption spectra. A shift of the order of 0.5 eV between... (More)

Taking advantage of the linear polarisation of synchrotron radiation, the polarisation dependence of the O K and Cu L3 X-ray absorption edges has been compared for in situ cleaved Bi2Sr2CaCu2O8 and Bi2Sr2CuO6 single crystals. The X-ray absorption spectra were measured by means of total electron yield detection. The spectra show for both crystals that the lowest unoccupied Cu 3d and O 2p orbitals are dominantly oriented parallel to the a-b plane, but also the presence of a small amount of unoccupied orbitals oriented perpendicular to the a-b plane can be deduced from both the O K and Cu L3 absorption spectra. A shift of the order of 0.5 eV between absorption into the in-plane and the out-of-plane Cu 3d orbitals was measured for the Bi2Sr2CaCu2O8 crystal, but no such shift was found for the Bi2Sr2CuO6 crystal. © 1993.

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author
organization
publishing date
type
Contribution to journal
publication status
published
in
Physica C: Superconductivity and its Applications
volume
214
issue
1-2
pages
8 pages
publisher
Elsevier
external identifiers
  • Scopus:0027657564
ISSN
0921-4534
DOI
10.1016/0921-4534(93)90116-8
language
English
LU publication?
yes
id
20720e70-3da9-4d2b-9d93-dd9c95bfb2c2
date added to LUP
2016-04-29 11:21:16
date last changed
2016-07-06 13:50:31
@misc{20720e70-3da9-4d2b-9d93-dd9c95bfb2c2,
  abstract     = {<p>Taking advantage of the linear polarisation of synchrotron radiation, the polarisation dependence of the O K and Cu L<sub>3</sub> X-ray absorption edges has been compared for in situ cleaved Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> and Bi<sub>2</sub>Sr<sub>2</sub>CuO<sub>6</sub> single crystals. The X-ray absorption spectra were measured by means of total electron yield detection. The spectra show for both crystals that the lowest unoccupied Cu 3d and O 2p orbitals are dominantly oriented parallel to the a-b plane, but also the presence of a small amount of unoccupied orbitals oriented perpendicular to the a-b plane can be deduced from both the O K and Cu L3 absorption spectra. A shift of the order of 0.5 eV between absorption into the in-plane and the out-of-plane Cu 3d orbitals was measured for the Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8</sub> crystal, but no such shift was found for the Bi<sub>2</sub>Sr<sub>2</sub>CuO<sub>6</sub> crystal. © 1993.</p>},
  author       = {Qvarford, M. and Saini, N. L. and Andersen, J. N. and Nyholm, R. and Lundgren, E. and Lindau, I. and van Acker, J. F. and Leonyuk, L. and Söderholm, S. and Flodström, S. A.},
  issn         = {0921-4534},
  language     = {eng},
  month        = {09},
  number       = {1-2},
  pages        = {119--126},
  publisher    = {ARRAY(0x87e4958)},
  series       = {Physica C: Superconductivity and its Applications},
  title        = {Polarisation-dependent X-ray absorption in high- and low-Tc Bi2Sr2Can-1CunO4+2n superconductors},
  url          = {http://dx.doi.org/10.1016/0921-4534(93)90116-8},
  volume       = {214},
  year         = {1993},
}