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Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3. / Kuroda, Kenta; Reimann, J.; Kokh, K. A. et al.

In: Physical Review B, Vol. 95, No. 8, 081103, 02.02.2017.

Research output: Contribution to journal › Article › peer-review

Harvard

Kuroda, K, Reimann, J, Kokh, KA, Tereshchenko, OE, Kimura, A, Güdde, J & Höfer, U 2017, 'Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3', Physical Review B, vol. 95, no. 8, 081103. https://doi.org/10.1103/PhysRevB.95.081103

APA

Kuroda, K., Reimann, J., Kokh, K. A., Tereshchenko, O. E., Kimura, A., Güdde, J., & Höfer, U. (2017). Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3. Physical Review B, 95(8), [081103]. https://doi.org/10.1103/PhysRevB.95.081103

Vancouver

Kuroda K, Reimann J, Kokh KA, Tereshchenko OE, Kimura A, Güdde J et al. Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3. Physical Review B. 2017 Feb 2;95(8):081103. doi: 10.1103/PhysRevB.95.081103

Author

Kuroda, Kenta ; Reimann, J. ; Kokh, K. A. et al. / Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3. In: Physical Review B. 2017 ; Vol. 95, No. 8.

BibTeX

@article{454351931b39402c9a3aa4fe11fa1527,
title = "Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3",
abstract = "We present energy-momentum mapping of the surface Dirac photocurrent in the topological insulator Sb2Te3 by means of time- and angle-resolved two-photon photoemission spectroscopy combined with polarization-variable midinfrared pulsed laser excitation. It is demonstrated that a direct optical transition from the occupied to the unoccupied part of the surface Dirac cone permits the linear and circular photogalvanic effect, which thereby enables us to coherently control the electric surface photocurrent by laser polarization. Moreover, the photocurrent mapping directly visualizes ultrafast current dynamics in the Dirac cone as a function of time. We unravel the ultrafast intraband relaxation dynamics of the inelastic scattering and momentum scattering separately. Our observations pave the way for coherent optical control over surface Dirac electrons in topological insulators.",
keywords = "MANIPULATION, DYNAMICS, CURRENTS, TEXTURE, BI2TE3",
author = "Kenta Kuroda and J. Reimann and Kokh, {K. A.} and Tereshchenko, {O. E.} and A. Kimura and J. G{\"u}dde and U. H{\"o}fer",
note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",
year = "2017",
month = feb,
day = "2",
doi = "10.1103/PhysRevB.95.081103",
language = "English",
volume = "95",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Physical Society",
number = "8",

}

RIS

TY - JOUR

T1 - Ultrafast energy- and momentum-resolved surface Dirac photocurrents in the topological insulator Sb2Te3

AU - Kuroda, Kenta

AU - Reimann, J.

AU - Kokh, K. A.

AU - Tereshchenko, O. E.

AU - Kimura, A.

AU - Güdde, J.

AU - Höfer, U.

N1 - Publisher Copyright: © 2017 American Physical Society.

PY - 2017/2/2

Y1 - 2017/2/2

N2 - We present energy-momentum mapping of the surface Dirac photocurrent in the topological insulator Sb2Te3 by means of time- and angle-resolved two-photon photoemission spectroscopy combined with polarization-variable midinfrared pulsed laser excitation. It is demonstrated that a direct optical transition from the occupied to the unoccupied part of the surface Dirac cone permits the linear and circular photogalvanic effect, which thereby enables us to coherently control the electric surface photocurrent by laser polarization. Moreover, the photocurrent mapping directly visualizes ultrafast current dynamics in the Dirac cone as a function of time. We unravel the ultrafast intraband relaxation dynamics of the inelastic scattering and momentum scattering separately. Our observations pave the way for coherent optical control over surface Dirac electrons in topological insulators.

AB - We present energy-momentum mapping of the surface Dirac photocurrent in the topological insulator Sb2Te3 by means of time- and angle-resolved two-photon photoemission spectroscopy combined with polarization-variable midinfrared pulsed laser excitation. It is demonstrated that a direct optical transition from the occupied to the unoccupied part of the surface Dirac cone permits the linear and circular photogalvanic effect, which thereby enables us to coherently control the electric surface photocurrent by laser polarization. Moreover, the photocurrent mapping directly visualizes ultrafast current dynamics in the Dirac cone as a function of time. We unravel the ultrafast intraband relaxation dynamics of the inelastic scattering and momentum scattering separately. Our observations pave the way for coherent optical control over surface Dirac electrons in topological insulators.

KW - MANIPULATION

KW - DYNAMICS

KW - CURRENTS

KW - TEXTURE

KW - BI2TE3

UR - http://www.scopus.com/inward/record.url?scp=85013167874&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.95.081103

DO - 10.1103/PhysRevB.95.081103

M3 - Article

AN - SCOPUS:85013167874

VL - 95

JO - Physical Review B

JF - Physical Review B

SN - 2469-9950

IS - 8

M1 - 081103

ER -

ID: 9021770