TY - JOUR
T1 - Determination of the surface and interface phase shifts in metallic quantum well structures of perovskite oxides
AU - Yoshimatsu, K.
AU - Sakai, E.
AU - Kobayashi, M.
AU - Horiba, K.
AU - Yoshida, T.
AU - Fujimori, A.
AU - Oshima, M.
AU - Kumigashira, H.
PY - 2013/9/19
Y1 - 2013/9/19
N2 - We propose an experimental approach to extract separately the surface and interface phase shift of standing waves in metallic quantum well (QW) structures composed of isostructural perovskite oxides. The "asymmetric" vacuum/SrVO3/SrTiO3 and "symmetric" SrTiO 3/SrVO3/SrTiO3 QW structures are fabricated in an epitaxial multilayer form. Using these metallic QW structures, the phase shifts at the surface (vacuum/SrVO3) and interface (SrTiO 3/SrVO3) are successfully obtained by analyzing a thickness series of angle-resolved photoemission spectra. The difference of the phase shift between the two boundaries reveals that nearly ideal quantum confinement is achieved at the interface, indicating that a SrTiO3 layer acts as a useful potential barrier.
AB - We propose an experimental approach to extract separately the surface and interface phase shift of standing waves in metallic quantum well (QW) structures composed of isostructural perovskite oxides. The "asymmetric" vacuum/SrVO3/SrTiO3 and "symmetric" SrTiO 3/SrVO3/SrTiO3 QW structures are fabricated in an epitaxial multilayer form. Using these metallic QW structures, the phase shifts at the surface (vacuum/SrVO3) and interface (SrTiO 3/SrVO3) are successfully obtained by analyzing a thickness series of angle-resolved photoemission spectra. The difference of the phase shift between the two boundaries reveals that nearly ideal quantum confinement is achieved at the interface, indicating that a SrTiO3 layer acts as a useful potential barrier.
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U2 - 10.1103/PhysRevB.88.115308
DO - 10.1103/PhysRevB.88.115308
M3 - Article
AN - SCOPUS:84884830791
SN - 1098-0121
VL - 88
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 11
M1 - 115308
ER -