Ortho-II band folding in YBa2Cu3O7-δ films revealed by angle-resolved photoemission

被引：31
|
作者：
Sassa, Y. [1 ]
Radovic, M. [2 ,3 ]
Mansson, M. [1 ,3 ,4 ]
Razzoli, E. [2 ,3 ]
Cui, X. Y. [2 ]
Pailhes, S. [5 ]
Guerrero, S. [6 ]
Shi, M. [2 ]
Willmott, P. R. [2 ]
Granozio, F. Miletto [7 ]
Mesot, J. [1 ,3 ]
Norman, M. R. [8 ]
Patthey, L. [2 ]
机构：
[1] ETH, Neutron Scattering Lab, CH-8093 Zurich, Switzerland
[2] Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland
[3] Ecole Polytech Fed Lausanne, Lab Synchrotron & Neutron Spect, CH-1015 Lausanne, Switzerland
[4] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland
[5] Univ Lyon 1, CNRS, UMR 5586, Lab PMCN, F-69622 Villeurbanne, France
[6] Paul Scherrer Inst, Condensed Matter Theory Grp, CH-5232 Villigen, Switzerland
[7] Complesso Univ Monte S Angelo, CNR SPIN, I-80126 Naples, Italy
[8] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA
来源：
PHYSICAL REVIEW B | 2011年 / 83卷 / 14期
基金：
瑞士国家科学基金会;
关键词：
HIGH-T-C; YBA2CU3O6+X; SURFACE;
D O I：
10.1103/PhysRevB.83.140511
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present an angle-resolved photoelectron spectroscopy study of YBa2Cu3O7-delta 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 CuO2 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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页数：4
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