Details

Autor(en) / Beteiligte

• Yoshimatsu, K.
• Horiba, K.
• Kumigashira, H.
• Yoshida, T.
• Fujimori, A.
• Oshima, M.

Titel

Metallic Quantum Well States in Artificial Structures of Strongly Correlated Oxide

Ist Teil von

• Science (American Association for the Advancement of Science), 2011-07, Vol.333 (6040), p.319-322

Ort / Verlag

Washington, DC: American Association for the Advancement of Science

Erscheinungsjahr

2011

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• The quantum confinement of strongly correlated electrons in artificial structures provides a platform for studying the behavior of correlated Fermi-liquid states in reduced dimensions. We report the creation and control of two-dimensional electron-liquid states in ultrathin films of SrVO 3 grown on Nb:SrTiO 3 substrates, which are artificial oxide structures that can be varied in thickness by single monolayers. Angle-resolved photoemission from the SrVO 3 /Nb:SrTiO 3 samples shows metallic quantum well states that are adequately described by the well-known phase-shift quantization rule. The observed quantum well states in SrVO 3 ultrathin films exhibit distinctive features—such as orbital-selective quantization originating from the anisotropic orbital character of the V 3d states and unusual band renormalization of the subbands near the Fermi level—that reflect complex interactions in the quantum well.