Unoccupied electronic state of lightly La-doped SrTiO3 observed by inverse-photoemission spectroscopy

Daisuke Baba; Tohru Higuchi; Hirofumi Kakemoto; Yoshinori Tokura; Shik Shin; Takeyo Tsukamoto

doi:10.1143/jjap.42.l837

Unoccupied electronic state of lightly La-doped SrTiO₃ observed by inverse-photoemission spectroscopy

Daisuke Baba, Tohru Higuchi, Hirofumi Kakemoto, Yoshinori Tokura, Shik Shin, Takeyo Tsukamoto

Department of Applied Physics

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

3 Citations (Scopus)

Abstract

The unoccupied electronic state of lightly La³⁺-doped SrTiO₃ has been studied by inverse-photoemission spectroscopy (IPES). The IPES spectra exhibit two features, which correspond to t_2g- and e_g-subbands of the Ti 3d state. The peak positions of t_2g- and e_g-subbands are in good agreement with the standard band calculation. The intensity of the t_2g-subband of the Ti 3d-induced conduction band decreases with increasing La³⁺ dopant concentration. This finding is direct evidence that the doped electrons enter the bottom of the Ti 3d-induced conduction band.

Original language	English
Pages (from-to)	L837-L839
Journal	Japanese Journal of Applied Physics
Volume	42
Issue number	7 B
DOIs	https://doi.org/10.1143/jjap.42.l837
Publication status	Published - 15 Jul 2003

Keywords

Band calculation
Electronic structure
Inverse photoemission spectroscopy (IPES)
La-doped SrTiO (LaSr TiO)
Rigid-band model
Unoccupied state

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10.1143/jjap.42.l837

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title = "Unoccupied electronic state of lightly La-doped SrTiO3 observed by inverse-photoemission spectroscopy",

abstract = "The unoccupied electronic state of lightly La3+-doped SrTiO3 has been studied by inverse-photoemission spectroscopy (IPES). The IPES spectra exhibit two features, which correspond to t2g- and eg-subbands of the Ti 3d state. The peak positions of t2g- and eg-subbands are in good agreement with the standard band calculation. The intensity of the t2g-subband of the Ti 3d-induced conduction band decreases with increasing La3+ dopant concentration. This finding is direct evidence that the doped electrons enter the bottom of the Ti 3d-induced conduction band.",

keywords = "Band calculation, Electronic structure, Inverse photoemission spectroscopy (IPES), La-doped SrTiO (LaSr TiO), Rigid-band model, Unoccupied state",

author = "Daisuke Baba and Tohru Higuchi and Hirofumi Kakemoto and Yoshinori Tokura and Shik Shin and Takeyo Tsukamoto",

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T1 - Unoccupied electronic state of lightly La-doped SrTiO3 observed by inverse-photoemission spectroscopy

AU - Baba, Daisuke

AU - Higuchi, Tohru

AU - Kakemoto, Hirofumi

AU - Tokura, Yoshinori

AU - Shin, Shik

AU - Tsukamoto, Takeyo

PY - 2003/7/15

Y1 - 2003/7/15

N2 - The unoccupied electronic state of lightly La3+-doped SrTiO3 has been studied by inverse-photoemission spectroscopy (IPES). The IPES spectra exhibit two features, which correspond to t2g- and eg-subbands of the Ti 3d state. The peak positions of t2g- and eg-subbands are in good agreement with the standard band calculation. The intensity of the t2g-subband of the Ti 3d-induced conduction band decreases with increasing La3+ dopant concentration. This finding is direct evidence that the doped electrons enter the bottom of the Ti 3d-induced conduction band.

AB - The unoccupied electronic state of lightly La3+-doped SrTiO3 has been studied by inverse-photoemission spectroscopy (IPES). The IPES spectra exhibit two features, which correspond to t2g- and eg-subbands of the Ti 3d state. The peak positions of t2g- and eg-subbands are in good agreement with the standard band calculation. The intensity of the t2g-subband of the Ti 3d-induced conduction band decreases with increasing La3+ dopant concentration. This finding is direct evidence that the doped electrons enter the bottom of the Ti 3d-induced conduction band.

KW - Band calculation

KW - Electronic structure

KW - Inverse photoemission spectroscopy (IPES)

KW - La-doped SrTiO (LaSr TiO)

KW - Rigid-band model

KW - Unoccupied state

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U2 - 10.1143/jjap.42.l837

DO - 10.1143/jjap.42.l837

M3 - Letter

AN - SCOPUS:0141829762

SN - 0021-4922

VL - 42

SP - L837-L839

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 7 B

ER -

Unoccupied electronic state of lightly La-doped SrTiO₃ observed by inverse-photoemission spectroscopy

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