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Title: Gigantic Surface Lifetime of an Intrinsic Topological Insulator

Abstract

We report that the interaction between light and novel two-dimensional electronic states holds promise to realize new fundamental physics and optical devices. Here, we use pump-probe photoemission spectroscopy to study the optically excited Dirac surface states in the bulk-insulating topological insulator Bi2Te2Se and reveal optical properties that are in sharp contrast to those of bulk-metallic topological insulators. We observe a gigantic optical lifetime exceeding 4 μs (1 μs=10$${-}$$6 s) for the surface states in Bi2Te2Se, whereas the lifetime in most topological insulators, such as Bi2Se3, has been limited to a few picoseconds (1 ps=10$${-}$$12 s). Moreover, we discover a surface photovoltage, a shift of the chemical potential of the Dirac surface states, as large as 100 mV. Lastly, our results demonstrate a rare platform to study charge excitation and relaxation in energy and momentum space in a two-dimensional system.

Authors:
 [1];  [2];  [3];  [4];  [5];  [2];  [2];  [2];  [2];  [6];  [7];  [3];  [8];  [9]
+ Show Author Affiliations
  1. Princeton Univ., NJ (United States). Joseph Henry Lab., Dept. of Physics; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Princeton Univ., NJ (United States). Joseph Henry Lab., Dept. of Physics
  3. Univ. of Tokyo (Japan). Inst. for Solid State Physics (ISSP)
  4. Princeton Univ., NJ (United States). Dept. of Chemistry; Peking Univ., Beijing (China). International Center for Quantum Materials
  5. Univ. of California, Berkeley, CA (United States). Dept. of Physics
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Univ. of Maryland, College Park, MD (United States). Joint Quantum Inst. and Condensed Matter Theory Center, Dept. of Physics; Monash Univ., Melbourne, VIC (Australia). School of Physics
  8. Princeton Univ., NJ (United States). Dept. of Chemistry
  9. Princeton Univ., NJ (United States). Joseph Henry Lab., Dept. of Physics; Princeton Univ., NJ (United States). Princeton Center for Complex Materials
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); Australian Research Council; Simons Foundation
OSTI Identifier:
1334115
Alternate Identifier(s):
OSTI ID: 1214746
Report Number(s):
LA-UR-15-26947
Journal ID: ISSN 0031-9007; PRLTAO
Grant/Contract Number:  
AC52-06NA25396; FG-02-05ER46200; AC03-76SF00098; FG02-07ER46352; SC0001911; AC02-05CH11231; GBMF4547; 26800165; DMR 1206513
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 11; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 36 MATERIALS SCIENCE; Topological Insulators; pump probe; ARPES

Citation Formats

Neupane, Madhab, Xu, Su-Yang, Ishida, Yukiaki, Jia, Shuang, Fregoso, Benjamin M., Liu, Chang, Belopolski, Ilya, Bian, Guang, Alidoust, Nasser, Durakiewicz, Tomasz, Galitski, Victor, Shin, Shik, Cava, Robert J., and Hasan, M. Zahid. Gigantic Surface Lifetime of an Intrinsic Topological Insulator. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.116801.
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Neupane, Madhab, Xu, Su-Yang, Ishida, Yukiaki, Jia, Shuang, Fregoso, Benjamin M., Liu, Chang, Belopolski, Ilya, Bian, Guang, Alidoust, Nasser, Durakiewicz, Tomasz, Galitski, Victor, Shin, Shik, Cava, Robert J., & Hasan, M. Zahid. Gigantic Surface Lifetime of an Intrinsic Topological Insulator. United States. https://doi.org/10.1103/PhysRevLett.115.116801
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Neupane, Madhab, Xu, Su-Yang, Ishida, Yukiaki, Jia, Shuang, Fregoso, Benjamin M., Liu, Chang, Belopolski, Ilya, Bian, Guang, Alidoust, Nasser, Durakiewicz, Tomasz, Galitski, Victor, Shin, Shik, Cava, Robert J., and Hasan, M. Zahid. Wed . "Gigantic Surface Lifetime of an Intrinsic Topological Insulator". United States. https://doi.org/10.1103/PhysRevLett.115.116801. https://www.osti.gov/servlets/purl/1334115.
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@article{osti_1334115,
title = {Gigantic Surface Lifetime of an Intrinsic Topological Insulator},
author = {Neupane, Madhab and Xu, Su-Yang and Ishida, Yukiaki and Jia, Shuang and Fregoso, Benjamin M. and Liu, Chang and Belopolski, Ilya and Bian, Guang and Alidoust, Nasser and Durakiewicz, Tomasz and Galitski, Victor and Shin, Shik and Cava, Robert J. and Hasan, M. Zahid},
abstractNote = {We report that the interaction between light and novel two-dimensional electronic states holds promise to realize new fundamental physics and optical devices. Here, we use pump-probe photoemission spectroscopy to study the optically excited Dirac surface states in the bulk-insulating topological insulator Bi2Te2Se and reveal optical properties that are in sharp contrast to those of bulk-metallic topological insulators. We observe a gigantic optical lifetime exceeding 4 μs (1 μs=10${-}$6 s) for the surface states in Bi2Te2Se, whereas the lifetime in most topological insulators, such as Bi2Se3, has been limited to a few picoseconds (1 ps=10${-}$12 s). Moreover, we discover a surface photovoltage, a shift of the chemical potential of the Dirac surface states, as large as 100 mV. Lastly, our results demonstrate a rare platform to study charge excitation and relaxation in energy and momentum space in a two-dimensional system.},
doi = {10.1103/PhysRevLett.115.116801},
journal = {Physical Review Letters},
number = 11,
volume = 115,
place = {United States},
year = {Wed Sep 09 00:00:00 EDT 2015},
month = {Wed Sep 09 00:00:00 EDT 2015}
}
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https://doi.org/10.1103/PhysRevLett.115.116801
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    Works referencing / citing this record:

    Dynamically Induced Excitonic Instability in Pumped Dirac Materials
    journal, December 2019

    Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
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    Spin Hall photoconductance in a three-dimensional topological insulator at room temperature
    journal, January 2018

    Prediction of a topological p + ip excitonic insulator with parity anomaly
    journal, January 2019

    Prolonged duration of nonequilibrated Dirac fermions in neutral topological insulators
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    Laser-induced persistent photovoltage on the surface of a ternary topological insulator at room temperature
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    Extreme ultraviolet time- and angle-resolved photoemission setup with 21.5 meV resolution using high-order harmonic generation from a turn-key Yb:KGW amplifier
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    • Liu, Yangyang; Beetar, John E.; Hosen, Md Mofazzel
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    Size constraints on a Majorana beam-splitter interferometer: Majorana coupling and surface-bulk scattering
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    Ionic and electronic properties of the topological insulator Bi 2 Te 2 Se investigated via β -detected nuclear magnetic relaxation and resonance of Li 8
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    Surface State Dynamics of Topological Insulators Investigated by Femtosecond Time- and Angle-Resolved Photoemission Spectroscopy
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    • Hedayat, Hamoon; Bugini, Davide; Yi, Hemian
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    Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
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    Excitonic instability in optically-pumped three-dimensional Dirac materials
    text, January 2017

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