Home >

news Help

Publication Information


Title
Japanese: 
English:Origin of Metallic States at the Heterointerface between the Band Insulators LaAlO3 and SrTiO3 
Author
Japanese: 吉松 公平, 安原 隆太郎, 組頭 広志, 尾嶋 正治.  
English: K. Yoshimatsu, R. Yasuhara, H. Kumigashira, M. Oshima.  
Language English 
Journal/Book name
Japanese: 
English:PHYSICAL REVIEW LETTERS 
Volume, Number, Page Vol. 101        Page 026802
Published date July 11, 2008 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1103/PhysRevLett.101.026802
Abstract We have studied the electronic structure at the heterointerface between the band insulators LaAlO3 and SrTiO3 using in situ photoemission spectroscopy. Our experimental results clearly reveal the formation of a notched structure on the SrTiO3 side due to band bending at the metallic LaAlO3=TiO2-SrTiO3 interface. The structure, however, is absent at the insulating LaAlO3=SrO-SrTiO3 interface. The present results indicate that the metallic states originate not from the charge transfer through the interface on a short-range scale but from the accumulation of carriers on a long-range scale.

©2007 Tokyo Institute of Technology All rights reserved.