Molecular beam epitaxy preparation and in situ characterization of FeTe thin 
films

Pereira, V. M.; Wu, C. N.; Liu, C. E.; Liao, S.-C.; Chang, C.-F.; Kuo, C.-Y.; Koz, C.; Schwarz, U.; Lin, H.-J.; Chen, C. T.; Tjeng, L. H.; Altendorf, S. G.

doi:10.1103/PhysRevMaterials.4.023405

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Molecular beam epitaxy preparation and in situ characterization of FeTe thin films

Pereira, V. M., Wu, C. N., Liu, C. E., Liao, S.-C., Chang, C.-F., Kuo, C.-Y., et al. (2020). Molecular beam epitaxy preparation and in situ characterization of FeTe thin films. Physical Review Materials, 4(2): 023405, pp. 1-6. doi:10.1103/PhysRevMaterials.4.023405.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-E947-5 Version Permalink: https://hdl.handle.net/21.11116/0000-0008-8646-2

Genre: Journal Article

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Creators:
Pereira, V. M.¹, Author
Wu, C. N.¹, Author
Liu, C. E.¹, Author
Liao, S.-C.¹, Author
Chang, C.-F.², Author
Kuo, C.-Y.¹, Author
Koz, C.³, Author
Schwarz, U.⁴, Author
Lin, H.-J.⁵, Author
Chen, C. T.⁵, Author
Tjeng, L. H.⁶, Author
Altendorf, S. G.⁷, Author

Affiliations:
1Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445
2Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863447
3Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863405
4Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863423
5External Organizations, ou_persistent22
6Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863452
7Simone Altendorf, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863458

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Abstract: We have synthesized Fe1+y Te thin films by means of molecular beam epitaxy (MBE) under Te-limited growth conditions. We found that epitaxial layer-by-layer growth is possible for a wide range of excess Fe values, wider than expected from what is known from studies on the bulk material. Using x-ray magnetic circular dichroism spectroscopy at the Fe L-2(,3) and Te M-4(,5) edges, we observed that films with high excess Fe contain ferromagnetic clusters while films with lower excess Fe remain nonmagnetic. Moreover, x-ray absorption spectroscopy showed that it is possible to obtain films with very similar electronic structure as that of a high quality bulk single crystal Fe-1.(14) Te. Our results suggest that MBE with Te-limited growth may provide an opportunity to synthesize FeTe films with smaller amounts of excess Fe as to come closer to a possible superconducting phase.

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Language(s): eng - English

Dates: Published Online: 2020-02-28Date issued: 2020-02-28

Publication Status: Issued

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Identifiers: ISI: 000517314500004
DOI: 10.1103/PhysRevMaterials.4.023405

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Title: Physical Review Materials

Abbreviation : Phys. Rev. Mat.

Source Genre: Journal

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Publ. Info: College Park, MD : American Physical Society

Pages: - Volume / Issue: 4 (2) Sequence Number: 023405 Start / End Page: 1 - 6 Identifier: ISSN: 2475-9953
CoNE: https://pure.mpg.de/cone/journals/resource/2475-9953