Nanostructured topological state in bismuth nanotube arrays: inverting bonding-antibonding levels of molecular orbitals

Nanoscale
Kyung-Hwan JinFeng Liu

Abstract

We demonstrate a new class of nanostructured topological materials that exhibit a topological quantum phase arising from nanoscale structural motifs. Based on first-principles calculations, we show that an array of bismuth nanotubes (Bi-NTs), a superlattice of Bi-NTs with periodicity in the order of tube diameter, behaves as a nanostructured two-dimensional (2D) quantum spin Hall (QSH) insulator, as confirmed from the calculated band topology and 1D helical edge states. The underpinning mechanism of the QSH phase in the Bi-NT array is revealed to be inversion of bonding-antibonding levels of molecular orbitals of constituent nanostructural elements in place of atomic-orbital band inversion in conventional QSH insulators. The quantized edge conductance of the QSH phase in a Bi-NT array can be more easily isolated from bulk contributions and their properties can be highly tuned by tube size, representing distinctive advantages of nanostructured topological phases. Our finding opens a new avenue for topological materials by extending topological phases into nanomaterials with molecular-orbital-band inversion.

References

Jul 26, 1996·Science·A ThessR E Smalley
Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Oct 5, 2001·Journal of the American Chemical Society·Y LiP Yang
Oct 26, 2005·Physical Review Letters·C L Kane, E J Mele
Nov 11, 2005·Nature·K S NovoselovA A Firsov
Dec 31, 2005·Physical Review Letters·C L Kane, E J Mele
Dec 16, 2006·Science·B Andrei BernevigShou-Cheng Zhang
Feb 7, 2007·Physical Review Letters·Shuichi Murakami
Sep 22, 2007·Science·Markus KönigShou-Cheng Zhang
Dec 19, 2009·Nano Letters·Regine BoldtMichael Ruck
Nov 24, 2011·Physical Review Letters·Toru HiraharaShuji Hasegawa
Oct 4, 2012·Physical Review Letters·Fang YangJin-Feng Jia
Apr 10, 2013·Scientific Reports·Stas M AvdoshenkoClaudia G Rocha
May 21, 2013·Physical Review Letters·O P Sushkov, A H Castro Neto
May 28, 2013·Physical Review Letters·Z F WangFeng Liu
Jun 8, 2013·Science·Xavier RoyColin Nuckolls
Jan 23, 2014·Nature Communications·Sumanjeet KaurD Frank Ogletree
Sep 24, 2014·Proceedings of the National Academy of Sciences of the United States of America·Miao ZhouFeng Liu
Feb 13, 2015·Scientific Reports·Kyung-Hwan Jin, Seung-Hoon Jhi
Mar 8, 2016·Physical Chemistry Chemical Physics : PCCP·Kyung-Hwan Jin, Seung-Hoon Jhi
Sep 8, 2016·Nature Communications·Z F WangFeng Liu
Jun 20, 2017·Nano Letters·L Z ZhangFeng Liu

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Citations

Jul 3, 2020·Nanoscale·Kyung-Hwan Jin, Feng Liu
May 24, 2019·Nano Letters·Chen HuHong Guo

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Software Mentioned

PHONOPY
Vienna ab initio simulation package ( VASP )

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