Details

Autor(en) / Beteiligte

• D'Angelo, M
• Yukawa, R
• Ozawa, K
• Yamamoto, S
• Hirahara, T
• Hasegawa, S
• Silly, M G
• Sirotti, F
• Matsuda, I

Titel

Hydrogen-induced surface metallization of SrTiO3(001)

Ist Teil von

• Physical review letters, 2012-03, Vol.108 (11), p.116802-116802

Ort / Verlag

United States: American Physical Society

Erscheinungsjahr

2012

Quelle

PROLA

Beschreibungen/Notizen

• 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.