Details

Autor(en) / Beteiligte

• Yoshimatsu, K
• Okabe, T
• Kumigashira, H
• Okamoto, S
• Aizaki, S
• Fujimori, A
• Oshima, M

Titel

Dimensional-crossover-driven metal-insulator transition in SrVO3 ultrathin films

Ist Teil von

• Physical review letters, 2010-04, Vol.104 (14), p.147601-147601

Ort / Verlag

United States

Erscheinungsjahr

2010

Quelle

PROLA

Beschreibungen/Notizen

• We have investigated the changes occurring in the electronic structure of digitally controlled SrVO(3) ultrathin films across the metal-insulator transition (MIT) by the film thickness using in situ photoemission spectroscopy. With decreasing film thickness, a pseudogap is formed at E(F) through spectral weight transfer from the coherent part to the incoherent part. The pseudogap finally evolves into an energy gap that is indicative of the MIT in a SrVO(3) ultrathin film. The observed spectral behavior is reproduced by layer dynamical-mean-field-theory calculations, and it indicates that the observed MIT is caused by the reduction in the bandwidth due to the dimensional crossover.