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  4. Surface optimization of RBa2Cu3O7-delta (R = Y, Nd) epitaxial high T-c films for in situ photoemission studies
 
research article

Surface optimization of RBa2Cu3O7-delta (R = Y, Nd) epitaxial high T-c films for in situ photoemission studies

Abrecht, M  
•
Schmauder, T
•
Ariosa, D  
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2000
Surface Review and Letters

One of the intrinsic difficulties for in situ photoemission studies of high T-c oxide films is the surface volatility, especially the oxygen loss. In order to solve this problem, we have constructed a dedicated system for high T-c film surface studies, in particular for ARPES measurements. Here we briefly describe our pulsed laser deposition (PLD) system that is linked to the photoemission chamber at the Synchrotron Radiation Center (SRC) in Wisconsin, and discuss crystallographic and electronic properties measured on epitaxial YBa2Cu3O7-delta (YBCO) and NdBa2Cu3O7-delta (NBCO) films. Resistivity and XRD studies show that the best c axis epitaxial films, with T-c (onset) = 92 K (T-c0 = 90.5 K), are monophase and single crystalline with crystal coherence up to almost 1 mum. Initial core level photoemission study indicates that, for YBCO on SrTiO3 (without any buffer layer), the Ba oxide layer tends to be the dominant surface layer. Further experiments are underway to reproducibly detect sharp Fermi edge and perform ARPES study on optimally doped film surfaces.

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Type
research article
DOI
10.1142/S0218625X00000415
Web of Science ID

WOS:000166583700012

Author(s)
Abrecht, M  
Schmauder, T
Ariosa, D  
Touzelet, O
Rast, S
Onellion, M
Pavuna, D  
Date Issued

2000

Published in
Surface Review and Letters
Volume

7

Issue

4

Start page

495

End page

500

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LPRX  
Available on Infoscience
February 26, 2007
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/3281
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