Ortho-II band folding in YBa_2Cu_30_(7-δ) films revealed by angle-resolved photoemission

Y. Sassa; M. Radovic; M. ManssonE. RazzoliX. Y. CuiS. PailhesS. GuerreroM. ShiP. R. WillmottF. Miletto GranozioJ. MesotM. R. NormanL. Patthey

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Ortho-II band folding in YBa_2Cu_30_(7-δ) films revealed by angle-resolved photoemission

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摘要

We present an angle-resolved photoelectron spectroscopy study of YBa_2Cu_30_(7-δ) films in situ grown by pulsed laser deposition. We have successfully produced underdoped surfaces with ordered oxygen vacancies within the CuO chains resulting in a clear ortho-II band folding of the Fermi surface. This indicates that order within the CuO chains affects the electronic properties of the Cu0_2 planes. Our results highlight the importance of having not only the correct surface carrier concentration, but also a very well ordered and clean surface in order that photoemission data on this compound be representative of the bulk.

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《Physical review, B. Condensed matter and materials physics》 |2011年第14期|140511:1-140511:4|共4页
作者
Y. Sassa; M. Radovic; M. ManssonE. RazzoliX. Y. CuiS. PailhesS. GuerreroM. ShiP. R. WillmottF. Miletto GranozioJ. MesotM. R. NormanL. Patthey;
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作者单位

Laboratory for Neutron Scattering, ETH Zurich and Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland;

Laboratory for Synchrotron and Neutron Spectroscopy, EPFL, CH-1015 Lausanne, Switzerland;

Laboratoire PMCN, UMR 5586, Universite Lyon 1, CNRS-Universite de Lyon, F-Villeurbanne 69622, FranceLaboratory for Solid State Physics, ETH Zurich, CH-8093 Zurich, SwitzerlandSwiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, SwitzerlandCNR-SPIN, Complesso Universitario Monte S. Angelo, 1-80126 Napoli, ItalyMaterials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA;

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正文语种英语
中图分类物理学;
关键词
Ortho-II; photoemission; angle-resolved;

Ortho-II band folding in YBa_2Cu_30_(7-δ) films revealed by angle-resolved photoemission

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