Robust Ti4+ states in SrTiO3 layers of La 0.6Sr0.4MnO3/SrTiO3/La 0.6Sr0.4MnO3 junctions

H. Kumigashira; A. Chikamatsu; R. Hashimoto; M. Oshima; T. Ohnishi; M. Lippmaa; H. Wadati; A. Fujimori; K. Ono; M. Kawasaki; H. Koinuma

doi:10.1063/1.2202118

Robust Ti⁴⁺ states in SrTiO₃ layers of La _0.6Sr_0.4MnO₃/SrTiO₃/La _0.6Sr_0.4MnO₃ junctions

H. Kumigashira, A. Chikamatsu, R. Hashimoto, M. Oshima, T. Ohnishi, M. Lippmaa, H. Wadati, A. Fujimori, K. Ono, M. Kawasaki, H. Koinuma

IMRAM - Division of Inorganic Material Research

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

28 Citations (Scopus)

Abstract

We have investigated the interfacial electronic structure of La0.6 Sr0.4 Mn O3 (LSMO) SrTi O3 (STO)/LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p core-level spectra clearly show Ti4+ states and do not exhibit any indication of Ti3+ states in Ti O2 layers irrespective of a different kind of adjacent atomic layer with different chemical carrier concentration. This result indicates that the Ti ions in the Ti O2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4+ states.

Original language	English
Article number	192504
Journal	Applied Physics Letters
Volume	88
Issue number	19
DOIs	https://doi.org/10.1063/1.2202118
Publication status	Published - 2006

Access to Document

10.1063/1.2202118

Cite this

@article{b56292fee39545be970c5525fa18487b,

title = "Robust Ti4+ states in SrTiO3 layers of La 0.6Sr0.4MnO3/SrTiO3/La 0.6Sr0.4MnO3 junctions",

abstract = "We have investigated the interfacial electronic structure of La0.6 Sr0.4 Mn O3 (LSMO) SrTi O3 (STO)/LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p core-level spectra clearly show Ti4+ states and do not exhibit any indication of Ti3+ states in Ti O2 layers irrespective of a different kind of adjacent atomic layer with different chemical carrier concentration. This result indicates that the Ti ions in the Ti O2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4+ states.",

author = "H. Kumigashira and A. Chikamatsu and R. Hashimoto and M. Oshima and T. Ohnishi and M. Lippmaa and H. Wadati and A. Fujimori and K. Ono and M. Kawasaki and H. Koinuma",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research (A16204024 and S17101004) from the Japan Society for the Promotion of Science. ",

year = "2006",

doi = "10.1063/1.2202118",

language = "English",

volume = "88",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "19",

}

TY - JOUR

T1 - Robust Ti4+ states in SrTiO3 layers of La 0.6Sr0.4MnO3/SrTiO3/La 0.6Sr0.4MnO3 junctions

AU - Kumigashira, H.

AU - Chikamatsu, A.

AU - Hashimoto, R.

AU - Oshima, M.

AU - Ohnishi, T.

AU - Lippmaa, M.

AU - Wadati, H.

AU - Fujimori, A.

AU - Ono, K.

AU - Kawasaki, M.

AU - Koinuma, H.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research (A16204024 and S17101004) from the Japan Society for the Promotion of Science.

PY - 2006

Y1 - 2006

N2 - We have investigated the interfacial electronic structure of La0.6 Sr0.4 Mn O3 (LSMO) SrTi O3 (STO)/LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p core-level spectra clearly show Ti4+ states and do not exhibit any indication of Ti3+ states in Ti O2 layers irrespective of a different kind of adjacent atomic layer with different chemical carrier concentration. This result indicates that the Ti ions in the Ti O2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4+ states.

AB - We have investigated the interfacial electronic structure of La0.6 Sr0.4 Mn O3 (LSMO) SrTi O3 (STO)/LSMO heterojunctions utilizing the elemental selectivity of photoemission spectroscopy. The Ti 2p core-level spectra clearly show Ti4+ states and do not exhibit any indication of Ti3+ states in Ti O2 layers irrespective of a different kind of adjacent atomic layer with different chemical carrier concentration. This result indicates that the Ti ions in the Ti O2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4+ states.

UR - http://www.scopus.com/inward/record.url?scp=33646694971&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33646694971&partnerID=8YFLogxK

U2 - 10.1063/1.2202118

DO - 10.1063/1.2202118

M3 - Article

AN - SCOPUS:33646694971

SN - 0003-6951

VL - 88

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 19

M1 - 192504

ER -

Robust Ti⁴⁺ states in SrTiO₃ layers of La _0.6Sr_0.4MnO₃/SrTiO₃/La _0.6Sr_0.4MnO₃ junctions

Abstract

Access to Document

Other files and links

Fingerprint

Cite this