Published July 1, 2006
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Three-dimensional dispersion induced by extreme tensile strain in La_(2–x)Sr_xCuO_4 films
Abstract
The electronic band structure probed by angle-resolved photoemission spectroscopy on thin epitaxial La2–xSrxCuO4 films under extreme tensile strain shows anomalous features compatible with c-axis dispersion. This result is in striking contrast with the usual quasi-two-dimensional (2D) dispersion observed up to now in most superconducting cuprates, including relaxed and compressively strained La2–xSrxCuO4 films grown under the same conditions. The data were analyzed using a 3D tight-binding dispersion for a body-centered-tetragonal lattice. We relate the enhancement of the c-axis dispersion to the significant displacement of the apical oxygen induced by epitaxial strain.
Additional Information
©2006 The American Physical Society (Received 23 May 2006; revised 27 June 2006; published 31 July 2006) This work was supported by the Swiss National Science Foundation and by the EPFL. This work is based upon research conducted at the Synchrotron Radiation Center, University of Wisconsin—Madison, which is supported by the NSF under Grant No. DMR-0537588.Files
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- Eprint ID
- 4590
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- CaltechAUTHORS:CLOprb06
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2006-08-29Created from EPrint's datestamp field
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2021-11-08Created from EPrint's last_modified field