Origin of the Anomalous Mass Renormalization in Metallic Quantum Well States of Strongly Correlated Oxide SrVO3

Masaki Kobayashi, Kohei Yoshimatsu, Enju Sakai, Miho Kitamura, Koji Horiba, Atsushi Fujimori, and Hiroshi Kumigashira
Phys. Rev. Lett. 115, 076801 – Published 13 August 2015
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    Abstract

    In situ angle-resolved photoemission spectroscopy (ARPES) has been performed on SrVO3 ultrathin films, which show metallic quantum well (QW) states, to unveil the origin of the anomalous mass enhancement in the QW subbands. The line-shape analysis of the ARPES spectra reveals that the strength of the electron correlation increases as the subband bottom energy approaches the Fermi level. These results indicate that the anomalous subband-dependent mass enhancement mainly arises from the quasi-one-dimensional character of confined V 3d states as a result of their orbital-selective quantization.

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    • Received 4 September 2014

    DOI:https://doi.org/10.1103/PhysRevLett.115.076801

    © 2015 American Physical Society

    Authors & Affiliations

    Masaki Kobayashi1,*, Kohei Yoshimatsu1,2,†, Enju Sakai1, Miho Kitamura1, Koji Horiba1, Atsushi Fujimori2, and Hiroshi Kumigashira1

    • 1Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba 305-0801, Japan
    • 2Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan

    • *Corresponding author. masakik@post.kek.jp
    • †Present address: Department of Applied Chemistry, Tokyo Institute of Technology, Tokyo 152-8522, Japan.

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    Vol. 115, Iss. 7 — 14 August 2015

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