Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry

M. Hajlaoui; E. Papalazarou; J. Mauchain; L. Perfetti; A. Taleb-Ibrahimi; F. Navarin; M. Monteverde; P. Auban-Senzier; C. R. Pasquier; N. Moisan; D. Boschetto; M. Neupane; M. Z. Hasan; T. Durakiewicz; Z. Jiang; Y. Xu; I. Miotkowski; Y. P. Chen; S. Jia; H. W. Ji; R. J. Cava; M. Marsi

doi:10.1038/ncomms4003

Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry

M. Hajlaoui, E. Papalazarou, J. Mauchain, L. Perfetti, A. Taleb-Ibrahimi, F. Navarin, M. Monteverde, P. Auban-Senzier, C. R. Pasquier, N. Moisan, D. Boschetto, M. Neupane, M. Z. Hasan, T. Durakiewicz, Z. Jiang, Y. Xu, I. Miotkowski, Y. P. Chen, S. Jia, H. W. JiR. J. Cava, M. Marsi

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Abstract

The advent of Dirac materials has made it possible to realize two-dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their photoconductive control with ultrafast light pulses is opening new perspectives for the transmission of current and information. Here we show that the interplay of surface and bulk transient carrier dynamics in a photoexcited topological insulator can control an essential parameter for photoconductivity - the balance between excess electrons and holes in the Dirac cone. This can result in a strongly out of equilibrium gas of hot relativistic fermions, characterized by a surprisingly long lifetime of more than 50 ps, and a simultaneous transient shift of chemical potential by as much as 100 meV. The unique properties of this transient Dirac cone make it possible to tune with ultrafast light pulses a relativistic nanoscale Schottky barrier, in a way that is impossible with conventional optoelectronic materials.

Original language	English (US)
Article number	3003
Journal	Nature communications
Volume	5
DOIs	https://doi.org/10.1038/ncomms4003
State	Published - Jan 6 2014

All Science Journal Classification (ASJC) codes

General Chemistry
General Biochemistry, Genetics and Molecular Biology
General Physics and Astronomy

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Hajlaoui, M., Papalazarou, E., Mauchain, J., Perfetti, L., Taleb-Ibrahimi, A., Navarin, F., Monteverde, M., Auban-Senzier, P., Pasquier, C. R., Moisan, N., Boschetto, D., Neupane, M., Hasan, M. Z., Durakiewicz, T., Jiang, Z., Xu, Y., Miotkowski, I., Chen, Y. P., Jia, S., ... Marsi, M. (2014). Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry. Nature communications, 5, Article 3003. https://doi.org/10.1038/ncomms4003

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title = "Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry",

abstract = "The advent of Dirac materials has made it possible to realize two-dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their photoconductive control with ultrafast light pulses is opening new perspectives for the transmission of current and information. Here we show that the interplay of surface and bulk transient carrier dynamics in a photoexcited topological insulator can control an essential parameter for photoconductivity - the balance between excess electrons and holes in the Dirac cone. This can result in a strongly out of equilibrium gas of hot relativistic fermions, characterized by a surprisingly long lifetime of more than 50 ps, and a simultaneous transient shift of chemical potential by as much as 100 meV. The unique properties of this transient Dirac cone make it possible to tune with ultrafast light pulses a relativistic nanoscale Schottky barrier, in a way that is impossible with conventional optoelectronic materials.",

author = "M. Hajlaoui and E. Papalazarou and J. Mauchain and L. Perfetti and A. Taleb-Ibrahimi and F. Navarin and M. Monteverde and P. Auban-Senzier and Pasquier, {C. R.} and N. Moisan and D. Boschetto and M. Neupane and Hasan, {M. Z.} and T. Durakiewicz and Z. Jiang and Y. Xu and I. Miotkowski and Chen, {Y. P.} and S. Jia and Ji, {H. W.} and Cava, {R. J.} and M. Marsi",

year = "2014",

month = jan,

day = "6",

doi = "10.1038/ncomms4003",

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Hajlaoui, M, Papalazarou, E, Mauchain, J, Perfetti, L, Taleb-Ibrahimi, A, Navarin, F, Monteverde, M, Auban-Senzier, P, Pasquier, CR, Moisan, N, Boschetto, D, Neupane, M, Hasan, MZ, Durakiewicz, T, Jiang, Z, Xu, Y, Miotkowski, I, Chen, YP, Jia, S, Ji, HW, Cava, RJ & Marsi, M 2014, 'Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry', Nature communications, vol. 5, 3003. https://doi.org/10.1038/ncomms4003

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T1 - Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry

AU - Hajlaoui, M.

AU - Papalazarou, E.

AU - Mauchain, J.

AU - Perfetti, L.

AU - Taleb-Ibrahimi, A.

AU - Navarin, F.

AU - Monteverde, M.

AU - Auban-Senzier, P.

AU - Pasquier, C. R.

AU - Moisan, N.

AU - Boschetto, D.

AU - Neupane, M.

AU - Hasan, M. Z.

AU - Durakiewicz, T.

AU - Jiang, Z.

AU - Xu, Y.

AU - Miotkowski, I.

AU - Chen, Y. P.

AU - Jia, S.

AU - Ji, H. W.

AU - Cava, R. J.

AU - Marsi, M.

PY - 2014/1/6

Y1 - 2014/1/6

N2 - The advent of Dirac materials has made it possible to realize two-dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their photoconductive control with ultrafast light pulses is opening new perspectives for the transmission of current and information. Here we show that the interplay of surface and bulk transient carrier dynamics in a photoexcited topological insulator can control an essential parameter for photoconductivity - the balance between excess electrons and holes in the Dirac cone. This can result in a strongly out of equilibrium gas of hot relativistic fermions, characterized by a surprisingly long lifetime of more than 50 ps, and a simultaneous transient shift of chemical potential by as much as 100 meV. The unique properties of this transient Dirac cone make it possible to tune with ultrafast light pulses a relativistic nanoscale Schottky barrier, in a way that is impossible with conventional optoelectronic materials.

AB - The advent of Dirac materials has made it possible to realize two-dimensional gases of relativistic fermions with unprecedented transport properties in condensed matter. Their photoconductive control with ultrafast light pulses is opening new perspectives for the transmission of current and information. Here we show that the interplay of surface and bulk transient carrier dynamics in a photoexcited topological insulator can control an essential parameter for photoconductivity - the balance between excess electrons and holes in the Dirac cone. This can result in a strongly out of equilibrium gas of hot relativistic fermions, characterized by a surprisingly long lifetime of more than 50 ps, and a simultaneous transient shift of chemical potential by as much as 100 meV. The unique properties of this transient Dirac cone make it possible to tune with ultrafast light pulses a relativistic nanoscale Schottky barrier, in a way that is impossible with conventional optoelectronic materials.

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Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry

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