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

MPG-Autoren

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Pereira, V. M.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Wu, C. N.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons246252

Liu, C. E.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Liao, S.-C.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Chang, C.-F.
Chun-Fu Chang, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kuo, C.-Y.
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126707

Koz, C.
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schwarz, U.
Ulrich Schwarz, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Tjeng, L. H.
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Altendorf, S. G.
Simone Altendorf, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

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.

Zitierlink: https://hdl.handle.net/21.11116/0000-0005-E947-5

Zusammenfassung

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.