Enhanced electron coherence in atomically thin Nb 3 SiTe 6

J. Hu, X. Liu, C. L. Yue, J. Y. Liu, H. W. Zhu, J. B. He, J. Wei, Z. Q. Mao, L. Yu Antipina, Z. I. Popov, P. B. Sorokin, T. J. Liu, P. W. Adams, S. M.A. Radmanesh, L. Spinu, H. Ji, D. Natelson

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

It is now well established that many of the technologically important properties of two-dimensional (2D) materials, such as the extremely high carrier mobility in graphene and the large direct band gaps in MoS 2 monolayers, arise from quantum confinement. However, the influence of reduced dimensions on electron-phonon (e-ph) coupling and its attendant dephasing effects in such systems has remained unclear. Although phonon confinement is expected to produce a suppression of e-ph interactions in 2D systems with rigid boundary conditions, experimental verification of this has remained elusive. Here, we show that the e-ph interaction is, indeed, modified by a phonon dimensionality crossover in layered Nb 3 SiTe 6 atomic crystals. When the thickness of the Nb 3 SiTe 6 crystals is reduced below a few unit cells, we observe an unexpected enhancement of the weak-antilocalization signature in magnetotransport. This finding strongly supports the theoretically predicted suppression of e-ph interactions caused by quantum confinement of phonons.

Original languageEnglish (US)
Pages (from-to)471-476
Number of pages6
JournalNature Physics
Volume11
Issue number6
DOIs
StatePublished - Jun 4 2015

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electron phonon interactions
retarding
electrons
carrier mobility
crystals
crossovers
graphene
phonons
signatures
boundary conditions
augmentation
cells

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hu, J., Liu, X., Yue, C. L., Liu, J. Y., Zhu, H. W., He, J. B., ... Natelson, D. (2015). Enhanced electron coherence in atomically thin Nb 3 SiTe 6 Nature Physics, 11(6), 471-476. https://doi.org/10.1038/nphys3321
Hu, J. ; Liu, X. ; Yue, C. L. ; Liu, J. Y. ; Zhu, H. W. ; He, J. B. ; Wei, J. ; Mao, Z. Q. ; Antipina, L. Yu ; Popov, Z. I. ; Sorokin, P. B. ; Liu, T. J. ; Adams, P. W. ; Radmanesh, S. M.A. ; Spinu, L. ; Ji, H. ; Natelson, D. / Enhanced electron coherence in atomically thin Nb 3 SiTe 6 In: Nature Physics. 2015 ; Vol. 11, No. 6. pp. 471-476.
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Hu, J, Liu, X, Yue, CL, Liu, JY, Zhu, HW, He, JB, Wei, J, Mao, ZQ, Antipina, LY, Popov, ZI, Sorokin, PB, Liu, TJ, Adams, PW, Radmanesh, SMA, Spinu, L, Ji, H & Natelson, D 2015, ' Enhanced electron coherence in atomically thin Nb 3 SiTe 6 ', Nature Physics, vol. 11, no. 6, pp. 471-476. https://doi.org/10.1038/nphys3321

Enhanced electron coherence in atomically thin Nb 3 SiTe 6 . / Hu, J.; Liu, X.; Yue, C. L.; Liu, J. Y.; Zhu, H. W.; He, J. B.; Wei, J.; Mao, Z. Q.; Antipina, L. Yu; Popov, Z. I.; Sorokin, P. B.; Liu, T. J.; Adams, P. W.; Radmanesh, S. M.A.; Spinu, L.; Ji, H.; Natelson, D.

In: Nature Physics, Vol. 11, No. 6, 04.06.2015, p. 471-476.

Research output: Contribution to journalArticle

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Hu J, Liu X, Yue CL, Liu JY, Zhu HW, He JB et al. Enhanced electron coherence in atomically thin Nb 3 SiTe 6 Nature Physics. 2015 Jun 4;11(6):471-476. https://doi.org/10.1038/nphys3321