TY - JOUR
T1 - Correlated electronic states of SrVO3 revealed by angle-resolved photoemission spectroscopy
AU - Yoshida, T.
AU - Kobayashi, M.
AU - Yoshimatsu, K.
AU - Kumigashira, H.
AU - Fujimori, A.
N1 - Funding Information:
We would like to thank fruitful and enlightening discussion with D. D. Sarma, K. Maiti, S. Shin, H. Eisaki, J. C. Fuggle, O. K. Andersen, S. Biermann, A. Georges, M. Imada, M. J. Rozenberg, and S. Okamoto. This work is supported by Grants-in-Aid for Scientific Research (15H02109, B25287095 and S22224005) and for Young Scientists (268708423) from JSPS, Elements Strategy Initiative to Form Core Research Center from the MEXT, and a grant from The Murata Science Foundation, Japan . This work was done under the approval of the Photon Factory Program Advisory Committee (Proposals No. 2007G597, 2008S2-003, 2013G218, and 2015G144).
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - In this article, we review recent progress in angle-resolved photoemission (ARPES) studies of the Mott-Hubbard-type correlated electron systems SrVO3. It has the d1 electron configuration and is an ideal model compound to study electron correlation effects in normal metal. ARPES studies of bulk single-crystal SrVO3 and CaVO3 have revealed the difference in the mass renormalization of electrons between them. In-situ ARPES studies of thin films fabricated by the pulsed laser deposition method have clarified not only quasi-particle dispersions, which show a kink like high-Tc cuprates, but also finite dispersions in the incoherent part. Self-energy in a wide energy range has been deduced from the ARPES spectral weight using Kramers-Kronig transformation. The obtained self-energy has several structures which yield the incoherent feature and a pseudogap-like dip similar to the high-Tc cuprates. Quantum-well states in ultrathin films of SrVO3 have revealed sub-bands with correlated electrons. These findings of electron correlation effects outlined in the present article would provide a starting point not only for fundamental condensed-matter physics but also for the development of new devices with correlated electrons.
AB - In this article, we review recent progress in angle-resolved photoemission (ARPES) studies of the Mott-Hubbard-type correlated electron systems SrVO3. It has the d1 electron configuration and is an ideal model compound to study electron correlation effects in normal metal. ARPES studies of bulk single-crystal SrVO3 and CaVO3 have revealed the difference in the mass renormalization of electrons between them. In-situ ARPES studies of thin films fabricated by the pulsed laser deposition method have clarified not only quasi-particle dispersions, which show a kink like high-Tc cuprates, but also finite dispersions in the incoherent part. Self-energy in a wide energy range has been deduced from the ARPES spectral weight using Kramers-Kronig transformation. The obtained self-energy has several structures which yield the incoherent feature and a pseudogap-like dip similar to the high-Tc cuprates. Quantum-well states in ultrathin films of SrVO3 have revealed sub-bands with correlated electrons. These findings of electron correlation effects outlined in the present article would provide a starting point not only for fundamental condensed-matter physics but also for the development of new devices with correlated electrons.
KW - Angle-resolved photoemission spectroscopy
KW - Correlated electron system
KW - Mott-Hubbard systems
KW - Self-energy
UR - http://www.scopus.com/inward/record.url?scp=84962861417&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84962861417&partnerID=8YFLogxK
U2 - 10.1016/j.elspec.2015.11.012
DO - 10.1016/j.elspec.2015.11.012
M3 - Article
AN - SCOPUS:84962861417
VL - 208
SP - 11
EP - 16
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
SN - 0368-2048
ER -