Surface electronic structures of terminating-layer-controlled La0.6Sr0.4MnO3 thin films studied by in situ synchrotron-radiation photoemission spectroscopy

2004 ◽  
Vol 272-276 ◽  
pp. 1120-1121 ◽  
Author(s):  
H Kumigashira ◽  
K Horiba ◽  
H Ohguchi ◽  
M Oshima ◽  
N Nakagawa ◽  
...  
Keyword(s):  
Thin Films ◽  
Synchrotron Radiation ◽  
Electronic Structures ◽  
Photoemission Spectroscopy ◽  
Synchrotron Radiation Photoemission

A SYNCHROTRON RADIATION STUDY OF THE FORMATION OF CuxSey AND NaxCuySez THIN FILMS ON Cu SUBSTRATES: Cl2-INDUCED OUT-DIFFUSION OF Na

2000 ◽  
Vol 07 (03) ◽  
pp. 235-242 ◽  
Author(s):  
V. SALTAS ◽  
C. A. PAPAGEORGOPOULOS ◽  
D. C. PAPAGEORGOPOULOS ◽  
D. TONTI ◽  
C. PETTENKOFER ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transition ◽  
Synchrotron Radiation ◽  
Copper Selenide ◽  
Photoemission Spectroscopy ◽  
Radiation Study ◽  
Cu Substrates ◽  
Compound Exposure ◽  
Selenide Film

In this paper we study the growth of Cu x Se y and Na x Cu y Se z thin films on polycrystalline Cu substrates. The investigation took place in situ by means of photoemission spectroscopy with synchrotron radiation, in UHV. Deposition of elemental Se with a dense flux on a polycrystalline Cu substrate at RT and subsequent heating to 100°C causes the formation of a thick Cu 2-x Se film (with x equal or very close to zero). A phase transition of this copper selenide occurs by annealing at 200°C. Deposited Na on the Cu 2-x Se film is diffused into the bulk, resulting in the formation of a Na x Cu y Se z compound. Exposure to Cl 2 at 120°C causes the out-diffusion of Na to the surface, where NaCl is formed. The Na diffusion in and out of the copper selenide film is analogous to alkali intercalation–deintercalation from TX 2 layer compounds.

The research of CdZnTe (111)B surface with synchrotron radiation photoemission spectroscopy

2009 ◽  
Vol 24 (5) ◽  
pp. 1639-1641 ◽  
Author(s):  
Gangqiang Zha ◽  
Wanqi Jie ◽  
Tingting Tan ◽  
XuXu Bai ◽  
Li Fu ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Work Function ◽  
Photoemission Spectroscopy ◽  
Low Energy Electron Diffraction ◽  
Local Reconstruction ◽  
Atomic Structures ◽  
Low Energy Electron ◽  
Synchrotron Radiation Photoemission ◽  
The Ideal

The clean and ordered surfaces of CdZnTe (111)B grown by the Bridgman method were obtained by Ar ion bombardment and thermal annealing in situ in an ultrahigh vacuum. The surface atomic structures of CdZnTe (111)B after annealing at different temperature were observed by low-energy electron diffraction (LEED). The valence band and work function of CdZnTe (111)B surfaces were determined by synchrotron radiation photoemission spectroscopy. The order of CdZnTe (111)B after annealing at 350 °C will worsen, and the (111)B-(2 × 2) local reconstruction will be formed. The work function of CdZnTe (111)B after annealing at 350 °C is 0.8 eV higher than that of CdZnTe (111)B-(1 × 1), and the local reconstruction may be induced by Te adatoms on top of the ideal truncation.

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