High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition

D. Schrupp; M. Sing; M. Tsunekawa; H. Fujiwara; S. Kasai; A. Sekiyama; S. Suga; T. Muro; V.A.M. Brabers; R. Claessen

High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition

D. Schrupp, M. Sing, M. Tsunekawa, H. Fujiwara, S. Kasai, A. Sekiyama, S. Suga, T. Muro, V.A.M. Brabers, R. Claessen

Physics of Nanostructures

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

Abstract

We have studied the electronic structure and charge ordering (Verwey) transition of magnetite (Fe3O4) by resonant soft x-ray photoemission at the Fe 2p-3d threshold. Due to the enhanced probing depth and the use of different surface prepns. we are able to distinguish surface and vol. contributions to the spectra. The intrinsic spectral wt. distribution near the chem. potential and its temp. dependence give evidence of strong polaron effects consistent with both d.c. and optical cond. The charge carriers in magnetite are strongly bound small polarons of the Jahn-Teller type. The stability of the charge order is thus not only driven by nearest-neighbor Coulomb interaction but strongly dominated by elastic lattice contributions. [on SciFinder (R)]

Original language	English
Title of host publication	Los Alamos National Laboratory
Place of Publication	Condensed Matter
Pages	1-5, arXiv
Publication status	Published - 2004

Cite this

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title = "High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition",

abstract = "We have studied the electronic structure and charge ordering (Verwey) transition of magnetite (Fe3O4) by resonant soft x-ray photoemission at the Fe 2p-3d threshold. Due to the enhanced probing depth and the use of different surface prepns. we are able to distinguish surface and vol. contributions to the spectra. The intrinsic spectral wt. distribution near the chem. potential and its temp. dependence give evidence of strong polaron effects consistent with both d.c. and optical cond. The charge carriers in magnetite are strongly bound small polarons of the Jahn-Teller type. The stability of the charge order is thus not only driven by nearest-neighbor Coulomb interaction but strongly dominated by elastic lattice contributions. [on SciFinder (R)]",

author = "D. Schrupp and M. Sing and M. Tsunekawa and H. Fujiwara and S. Kasai and A. Sekiyama and S. Suga and T. Muro and V.A.M. Brabers and R. Claessen",

year = "2004",

language = "English",

pages = "1--5, arXiv",

booktitle = "Los Alamos National Laboratory",

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TY - GEN

T1 - High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition

AU - Schrupp, D.

AU - Sing, M.

AU - Tsunekawa, M.

AU - Fujiwara, H.

AU - Kasai, S.

AU - Sekiyama, A.

AU - Suga, S.

AU - Muro, T.

AU - Brabers, V.A.M.

AU - Claessen, R.

PY - 2004

Y1 - 2004

N2 - We have studied the electronic structure and charge ordering (Verwey) transition of magnetite (Fe3O4) by resonant soft x-ray photoemission at the Fe 2p-3d threshold. Due to the enhanced probing depth and the use of different surface prepns. we are able to distinguish surface and vol. contributions to the spectra. The intrinsic spectral wt. distribution near the chem. potential and its temp. dependence give evidence of strong polaron effects consistent with both d.c. and optical cond. The charge carriers in magnetite are strongly bound small polarons of the Jahn-Teller type. The stability of the charge order is thus not only driven by nearest-neighbor Coulomb interaction but strongly dominated by elastic lattice contributions. [on SciFinder (R)]

AB - We have studied the electronic structure and charge ordering (Verwey) transition of magnetite (Fe3O4) by resonant soft x-ray photoemission at the Fe 2p-3d threshold. Due to the enhanced probing depth and the use of different surface prepns. we are able to distinguish surface and vol. contributions to the spectra. The intrinsic spectral wt. distribution near the chem. potential and its temp. dependence give evidence of strong polaron effects consistent with both d.c. and optical cond. The charge carriers in magnetite are strongly bound small polarons of the Jahn-Teller type. The stability of the charge order is thus not only driven by nearest-neighbor Coulomb interaction but strongly dominated by elastic lattice contributions. [on SciFinder (R)]

M3 - Conference contribution

SP - 1-5, arXiv

BT - Los Alamos National Laboratory

CY - Condensed Matter

ER -

High-energy photoemission on Fe3O4: Small polaron physics and the Verwey transition

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