Intrinsic quantum spin Hall and anomalous Hall effects in: H -Sb/Bi epitaxial growth on a ferromagnetic MnO thin film
Nanoscale, ISSN: 2040-3372, Vol: 8, Issue: 21, Page: 11202-11209
2016
- 17Citations
- 19Captures
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Article Description
Exploring a two-dimensional intrinsic quantum spin Hall state with a large band gap as well as an anomalous Hall state in realizable materials is one of the most fundamental and important goals for future applications in spintronics, valleytronics, and quantum computing. Here, by combining first-principles calculations with a tight-binding model, we predict that Sb or Bi can epitaxially grow on a stable and ferromagnetic MnO thin film substrate, forming a flat honeycomb sheet. The flatness of Sb or Bi provides an opportunity for the existence of Dirac points in the Brillouin zone, with its position effectively tuned by surface hydrogenation. The Dirac points in spin up and spin down channels split due to the proximity effects induced by MnO. In the presence of both intrinsic and Rashba spin-orbit coupling, we find two band gaps exhibiting a large band gap quantum spin Hall state and a nearly quantized anomalous Hall state which can be tuned by adjusting the Fermi level. Our findings provide an efficient way to realize both quantized intrinsic spin Hall conductivity and anomalous Hall conductivity in a single material.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84971449572&origin=inward; http://dx.doi.org/10.1039/c6nr01949h; http://www.ncbi.nlm.nih.gov/pubmed/27181160; http://xlink.rsc.org/?DOI=C6NR01949H; http://pubs.rsc.org/en/content/articlepdf/2016/NR/C6NR01949H; https://xlink.rsc.org/?DOI=C6NR01949H; https://dx.doi.org/10.1039/c6nr01949h; https://pubs.rsc.org/en/content/articlelanding/2016/nr/c6nr01949h
Royal Society of Chemistry (RSC)
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