Polarisation-dependent X-ray absorption in high- and low-Tc Bi2Sr2Can-1CunO4+2n superconductors
(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.
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- author
- 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.
- organization
- publishing date
- 1993-09-01
- 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
- 2021-12-29 08:03:34
@article{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.</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 = {{Elsevier}},
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}},
doi = {{10.1016/0921-4534(93)90116-8}},
volume = {{214}},
year = {{1993}},
}