Electronic structure and magnetism of strained bcc phases across the fcc to bcc transition in ultrathin Fe films
Articolo
Data di Pubblicazione:
2016
Citazione:
Electronic structure and magnetism of strained bcc phases across the fcc to bcc transition in ultrathin Fe films / A. Calloni, G. Berti, G. Bussetti, G. Fratesi, M. Finazzi, F. Ciccacci, L. Duò. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 94:19(2016 Nov 30), pp. 195155.195155-1-195155.195155-11. [10.1103/PhysRevB.94.195155]
Abstract:
We investigated the electronic structure of the bcc metastable phases involved in the fcc to bcc transition of Fe. Ultrathin Fe films were grown on a 2-monolayer (ML) Ni/W(110) substrate, where a fcc lattice is stabilized at low Fe coverages and the transition proceeds through the formation of bcc nuclei showing a specific "Kurdjumov-Sachs" orientation with the substrate. A comprehensive description of the electronic structure evolution is achieved by combining spin-resolved UV photoemission spectroscopy and ab initio calculations. According to our results, an exchange-split band structure is observed starting from 2 ML of Fe, concomitant with the formation of ferromagnetic bcc nuclei. Continuous modifications are observed in the spin-resolved photoemission spectra for increasing Fe coverage, especially for what concerns the minority states, possibly indicative of the progressive relaxation of the strained bcc phase starting from the bcc/fcc interface.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
electronic, optical and magnetic materials; condensed matter physics
Elenco autori:
A. Calloni, G. Berti, G. Bussetti, G. Fratesi, M. Finazzi, F. Ciccacci, L. Duò
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