期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.116802
关键词
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资金
- Synchrotron Soleil, France
- Synchrotron Radiation Research Organization
- University of Tokyo [7401, 2011A7415]
- PICS/CNRS
- JSPS
- Grants-in-Aid for Scientific Research [22246006, 23560020, 22656011, 23686007] Funding Source: KAKEN
Surface metallization of SrTiO3(001) by hydrogen adsorption is experimentally confirmed for the first time by photoemission spectroscopy and surface conductivity measurements. The metallic state is assigned to a quantized state in the space-charge layer induced by electron doping from hydrogen atoms. The measured two-dimensional (2D) conductivity is well above the 2D Ioffe-Regel limit indicating that the system is in a metallic conduction regime. The mean free path of the surface electron is estimated to be several nanometers at room temperature.
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