Observation of an eg-derived metallic band at the Cs/SrTiO3 interface by polarization-dependent photoemission spectroscopy

Kazuma Akikubo; Iwao Matsuda; Didier Schmaus; Guillaume Marcaud; Ro Ya Liu; Mathieu G. Silly; Fausto Sirotti; Marie D'Angelo

doi:10.1016/j.tsf.2016.01.042

Observation of an e_g-derived metallic band at the Cs/SrTiO₃ interface by polarization-dependent photoemission spectroscopy

Kazuma Akikubo
, Iwao Matsuda
, Didier Schmaus
, Guillaume Marcaud
, Ro Ya Liu
, Mathieu G. Silly
, Fausto Sirotti
, Marie D'Angelo

Institute for Solid State Physics
University of Tokyo
CNRS, UMR 7588, INSP
Synchrotron SOLEIL
Synchrotron SOLEIL

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A metallic band having the d_z^2--symmetry was evidenced at the interface between a Cs film and the SrTiO₃(001) substrate. The symmetry assignment was carried out with the dipole-transition selection rule, probed by polarization-dependent photoemission spectroscopy. The e_g-derived state of the SrTiO₃(001) crystal is likely to be a bonding state composed of Cs s-orbital and Ti d-orbital with the e_g symmetry, as predicted theoretically.

Original language	English
Pages (from-to)	149-153
Number of pages	5
Journal	Thin Solid Films
Volume	603
DOIs	https://doi.org/10.1016/j.tsf.2016.01.042
Publication status	Published - 31 Mar 2016
Externally published	Yes

Keywords

Alkali metals
Electronic structure
Interface
Orbital order
Photoemission spectroscopy
Strontium titanate

Access to Document

10.1016/j.tsf.2016.01.042

Cite this

@article{6cc9b727334043f2a4cd4e302c2c268b,

title = "Observation of an eg-derived metallic band at the Cs/SrTiO3 interface by polarization-dependent photoemission spectroscopy",

abstract = "A metallic band having the dz2--symmetry was evidenced at the interface between a Cs film and the SrTiO3(001) substrate. The symmetry assignment was carried out with the dipole-transition selection rule, probed by polarization-dependent photoemission spectroscopy. The eg-derived state of the SrTiO3(001) crystal is likely to be a bonding state composed of Cs s-orbital and Ti d-orbital with the eg symmetry, as predicted theoretically.",

keywords = "Alkali metals, Electronic structure, Interface, Orbital order, Photoemission spectroscopy, Strontium titanate",

author = "Kazuma Akikubo and Iwao Matsuda and Didier Schmaus and Guillaume Marcaud and Liu, \{Ro Ya\} and Silly, \{Mathieu G.\} and Fausto Sirotti and Marie D'Angelo",

year = "2016",

month = mar,

day = "31",

doi = "10.1016/j.tsf.2016.01.042",

language = "English",

volume = "603",

pages = "149--153",

journal = "Thin Solid Films",

issn = "0040-6090",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Observation of an eg-derived metallic band at the Cs/SrTiO3 interface by polarization-dependent photoemission spectroscopy

AU - Akikubo, Kazuma

AU - Matsuda, Iwao

AU - Schmaus, Didier

AU - Marcaud, Guillaume

AU - Liu, Ro Ya

AU - Silly, Mathieu G.

AU - Sirotti, Fausto

AU - D'Angelo, Marie

PY - 2016/3/31

Y1 - 2016/3/31

N2 - A metallic band having the dz2--symmetry was evidenced at the interface between a Cs film and the SrTiO3(001) substrate. The symmetry assignment was carried out with the dipole-transition selection rule, probed by polarization-dependent photoemission spectroscopy. The eg-derived state of the SrTiO3(001) crystal is likely to be a bonding state composed of Cs s-orbital and Ti d-orbital with the eg symmetry, as predicted theoretically.

AB - A metallic band having the dz2--symmetry was evidenced at the interface between a Cs film and the SrTiO3(001) substrate. The symmetry assignment was carried out with the dipole-transition selection rule, probed by polarization-dependent photoemission spectroscopy. The eg-derived state of the SrTiO3(001) crystal is likely to be a bonding state composed of Cs s-orbital and Ti d-orbital with the eg symmetry, as predicted theoretically.

KW - Alkali metals

KW - Electronic structure

KW - Interface

KW - Orbital order

KW - Photoemission spectroscopy

KW - Strontium titanate

U2 - 10.1016/j.tsf.2016.01.042

DO - 10.1016/j.tsf.2016.01.042

M3 - Article

AN - SCOPUS:84962343528

SN - 0040-6090

VL - 603

SP - 149

EP - 153

JO - Thin Solid Films

JF - Thin Solid Films