Direct observation of spin-polarized bulk bands in an inversion-symmetric semiconductor View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2014-11

AUTHORS

J. M. Riley, F. Mazzola, M. Dendzik, M. Michiardi, T. Takayama, L. Bawden, C. Granerød, M. Leandersson, T. Balasubramanian, M. Hoesch, T. K. Kim, H. Takagi, W. Meevasana, Ph. Hofmann, M. S. Bahramy, J. W. Wells, P. D. C. King

ABSTRACT

Methods to generate spin-polarized electronic states in non-magnetic solids are strongly desired to enable all-electrical manipulation of electron spins for new quantum devices1. This is generally accepted to require breaking global structural inversion symmetry1,2,3,4,5. In contrast, here we report the observation from spin- and angle-resolved photoemission spectroscopy of spin-polarized bulk states in the centrosymmetric transition-metal dichalcogenide WSe2. Mediated by a lack of inversion symmetry in constituent structural units of the bulk crystal where the electronic states are localized6, we show how spin splittings up to 0.5 eV result, with a spin texture that is strongly modulated in both real and momentum space. Through this, our study provides direct experimental evidence for a putative locking of the spin with the layer and valley pseudospins in transition-metal dichalcogenides7,8, of key importance for using these compounds in proposed valleytronic devices. More... »

PAGES

835

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/nphys3105

DOI

http://dx.doi.org/10.1038/nphys3105

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1018879371


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