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Exchange-split interface state at h-BN/Ni(111)


Zumbrägel, K; Wulff, K; Eibl, C; Donath, M; Hengsberger, M (2008). Exchange-split interface state at h-BN/Ni(111). Physical Review B, 78(8):085422-7pp.

Abstract

The insulator/ferromagnet interface system of hexagonal boron nitride on Ni(111) was investigated with spin- and angle-resolved inverse photoemission and spin-polarized secondary electron emission. We identified the theoretically predicted boron nitride (BN) interface state at 1.7 eV above the Fermi level. The interface state is found to be influenced by the ferromagnetic substrate, which is reflected in a magnetic exchange splitting of 130±50 meV. Parallel to the surface, it shows a free-electron-like E(k||) dispersion with an effective mass of 1.1±0.2me. Furthermore, we found a spectral feature at 2.2 eV above the Fermi level, which we attribute to indirect transitions into a region of high density of BN-induced states.

Abstract

The insulator/ferromagnet interface system of hexagonal boron nitride on Ni(111) was investigated with spin- and angle-resolved inverse photoemission and spin-polarized secondary electron emission. We identified the theoretically predicted boron nitride (BN) interface state at 1.7 eV above the Fermi level. The interface state is found to be influenced by the ferromagnetic substrate, which is reflected in a magnetic exchange splitting of 130±50 meV. Parallel to the surface, it shows a free-electron-like E(k||) dispersion with an effective mass of 1.1±0.2me. Furthermore, we found a spectral feature at 2.2 eV above the Fermi level, which we attribute to indirect transitions into a region of high density of BN-induced states.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:19 August 2008
Deposited On:10 Feb 2009 15:31
Last Modified:05 Apr 2016 12:50
Publisher:American Physical Society
ISSN:1098-0121
Publisher DOI:https://doi.org/10.1103/PhysRevB.78.085422

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