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

doi:10.1038/nphys3321

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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 language	English (US)
Pages (from-to)	471-476
Number of pages	6
Journal	Nature Physics
Volume	11
Issue number	6
DOIs	https://doi.org/10.1038/nphys3321
State	Published - Jun 4 2015

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1038/nphys3321

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

@article{bccb6287699a4cf3bc264cdf1dec394c,

title = " Enhanced electron coherence in atomically thin Nb 3 SiTe 6 ",

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.",

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

year = "2015",

month = jun,

day = "4",

doi = "10.1038/nphys3321",

language = "English (US)",

volume = "11",

pages = "471--476",

journal = "Nature Physics",

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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

TY - JOUR

T1 - Enhanced electron coherence in atomically thin Nb 3 SiTe 6

AU - Hu, J.

AU - Liu, X.

AU - Yue, C. L.

AU - Liu, J. Y.

AU - Zhu, H. W.

AU - He, J. B.

AU - Wei, J.

AU - Mao, Z. Q.

AU - Antipina, L. Yu

AU - Popov, Z. I.

AU - Sorokin, P. B.

AU - Liu, T. J.

AU - Adams, P. W.

AU - Radmanesh, S. M.A.

AU - Spinu, L.

AU - Ji, H.

AU - Natelson, D.

PY - 2015/6/4

Y1 - 2015/6/4

N2 - 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.

AB - 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.

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VL - 11

SP - 471

EP - 476

JO - Nature Physics

JF - Nature Physics

IS - 6

ER -

Enhanced electron coherence in atomically thin Nb ₃ SiTe ₆

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