In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions

C. E. Liu; C. N. Wu; J. Falke; C. F. Chang; C. Y. Kuo; S. Yang; J. Y. Juang; C. Koz; U. Schwarz; C. T. Chen; L. H. Tjeng; S. G. Altendorf

doi:10.1103/PhysRevB.110.245139

In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions

C. E. Liu
, C. N. Wu
, J. Falke
, C. F. Chang
, C. Y. Kuo
, S. Yang
, J. Y. Juang
, C. Koz
, U. Schwarz
, C. T. Chen
, L. H. Tjeng
, S. G. Altendorf

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

Abstract

FexTe thin films were prepared on SrTiO3 (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using in situ x-ray absorption spectroscopy at the Fe L2,3 and Te M4,5 edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio ≈ 1) provides the sharpest spectral features, indicating that Fe1.00Te can be synthesized as a thin film, although it is not possible in bulk.

Original language	English
Article number	245139
Journal	Physical Review B
Volume	110
Issue number	24
DOIs	https://doi.org/10.1103/PhysRevB.110.245139
State	Published - 15 Dec 2024

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10.1103/PhysRevB.110.245139

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Liu, C. E., Wu, C. N., Falke, J., Chang, C. F., Kuo, C. Y., Yang, S., Juang, J. Y., Koz, C., Schwarz, U., Chen, C. T., Tjeng, L. H., & Altendorf, S. G. (2024). In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions. Physical Review B, 110(24), Article 245139. https://doi.org/10.1103/PhysRevB.110.245139

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title = "In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions",

abstract = "FexTe thin films were prepared on SrTiO3 (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using in situ x-ray absorption spectroscopy at the Fe L2,3 and Te M4,5 edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio ≈ 1) provides the sharpest spectral features, indicating that Fe1.00Te can be synthesized as a thin film, although it is not possible in bulk.",

author = "Liu, \{C. E.\} and Wu, \{C. N.\} and J. Falke and Chang, \{C. F.\} and Kuo, \{C. Y.\} and S. Yang and Juang, \{J. Y.\} and C. Koz and U. Schwarz and Chen, \{C. T.\} and Tjeng, \{L. H.\} and Altendorf, \{S. G.\}",

note = "Publisher Copyright: {\textcopyright} 2024 authors. Published by the American Physical Society.",

year = "2024",

month = dec,

day = "15",

doi = "10.1103/PhysRevB.110.245139",

language = "English",

volume = "110",

journal = "Physical Review B",

issn = "2469-9950",

publisher = "American Physical Society",

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TY - JOUR

T1 - In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions

AU - Liu, C. E.

AU - Wu, C. N.

AU - Falke, J.

AU - Chang, C. F.

AU - Kuo, C. Y.

AU - Yang, S.

AU - Juang, J. Y.

AU - Koz, C.

AU - Schwarz, U.

AU - Chen, C. T.

AU - Tjeng, L. H.

AU - Altendorf, S. G.

PY - 2024/12/15

Y1 - 2024/12/15

N2 - FexTe thin films were prepared on SrTiO3 (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using in situ x-ray absorption spectroscopy at the Fe L2,3 and Te M4,5 edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio ≈ 1) provides the sharpest spectral features, indicating that Fe1.00Te can be synthesized as a thin film, although it is not possible in bulk.

AB - FexTe thin films were prepared on SrTiO3 (001) substrates by molecular beam epitaxy in a well-ordered epitaxial layer-by-layer fashion. The composition of the films was varied by adjusting the Te flux in a Te-limited growth regime. Changes in the electronic structure were systematically studied using in situ x-ray absorption spectroscopy at the Fe L2,3 and Te M4,5 edges and x-ray photoelectron spectroscopy of core levels and valence band. We found that FeTe with optimized composition (Fe/Te ratio ≈ 1) provides the sharpest spectral features, indicating that Fe1.00Te can be synthesized as a thin film, although it is not possible in bulk.

UR - https://www.scopus.com/pages/publications/85213420173

U2 - 10.1103/PhysRevB.110.245139

DO - 10.1103/PhysRevB.110.245139

M3 - Article

AN - SCOPUS:85213420173

SN - 2469-9950

VL - 110

JO - Physical Review B

JF - Physical Review B

IS - 24

M1 - 245139

ER -

In situ x-ray absorption and photoelectron spectroscopy on epitaxial FexTe thin films with a wide range of Fe/Te compositions

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