Topological surface states protected from backscattering by chiral spin texture View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2009-08-09

AUTHORS

Pedram Roushan, Jungpil Seo, Colin V. Parker, Y. S. Hor, D. Hsieh, Dong Qian, Anthony Richardella, M. Z. Hasan, R. J. Cava, Ali Yazdani

ABSTRACT

Topological insulators: no turning backTopological insulators are materials in which a relativistic effect known as spin–orbit coupling gives rise to a bulk insulating gap and surface states that resemble so-called chiral edge states in the quantum Hall effect. It has been theoretically suggested that the quantum mechanical spin degree of freedom of such surface edge states may be protected against scattering due to topology, which could be useful for spintronics and quantum computing. Now Roushan et al. provide the experimental confirmation of this important prediction. Using scanning tunnelling and angle-resolved photoemission microscopy they are able to demonstrate that, despite strong atomic scale disorder in their system, backscattering between surface states with opposite momentum and opposite spin is absent. More... »

PAGES

1106-1109

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/nature08308

DOI

http://dx.doi.org/10.1038/nature08308

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1010065345

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/19668187


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