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Title: Surface collective modes in the topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex

Abstract

In this study, we used low-energy, momentum-resolved inelastic electron scattering to study surface collective modes of the three-dimensional topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex. Our goal was to identify the “spin plasmon” predicted by Raghu and co-workers [Phys. Rev. Lett. 104, 116401 (2010)]. Instead, we found that the primary collective mode is a surface plasmon arising from the bulk, free carriers in these materials. This excitation dominates the spectral weight in the bosonic function of the surface χ''(q,ω) at THz energy scales, and is the most likely origin of a quasiparticle dispersion kink observed in previous photoemission experiments. Our study suggests that the spin plasmon may mix with this other surface mode, calling for a more nuanced understanding of optical experiments in which the spin plasmon is reported to play a role.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3];  [2];  [2];  [2];  [2];  [1];  [1];  [1];  [1]
  1. Univ. of Illinois, Urbana, IL (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Korea Advanced Institute of Science and Technology, Daejeon (Korea)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1240702
Alternate Identifier(s):
OSTI ID: 1229910
Report Number(s):
BNL-111864-2016-JA
Journal ID: ISSN 0031-9007; PRLTAO; R&D Project: PO010; PO016; KC0201060; KC0202020
Grant/Contract Number:  
SC0012704; AC02-98CH10886; SC00112704; FG02-07ER46383; SC0012649
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 115; Journal Issue: 25; 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

Citation Formats

Kogar, A., Gu, G., Vig, S., Thaler, A., Wong, M. H., Xiao, Y., Reig-i-Plessis, D., Cho, G. Y., Valla, T., Pan, Z., Schneeloch, J., Zhong, R., Hughes, T. L., MacDougall, G. J., Chiang, T. -C., and Abbamonte, P. Surface collective modes in the topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex. United States: N. p., 2015. Web. doi:10.1103/PhysRevLett.115.257402.
Kogar, A., Gu, G., Vig, S., Thaler, A., Wong, M. H., Xiao, Y., Reig-i-Plessis, D., Cho, G. Y., Valla, T., Pan, Z., Schneeloch, J., Zhong, R., Hughes, T. L., MacDougall, G. J., Chiang, T. -C., & Abbamonte, P. Surface collective modes in the topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex. United States. doi:10.1103/PhysRevLett.115.257402.
Kogar, A., Gu, G., Vig, S., Thaler, A., Wong, M. H., Xiao, Y., Reig-i-Plessis, D., Cho, G. Y., Valla, T., Pan, Z., Schneeloch, J., Zhong, R., Hughes, T. L., MacDougall, G. J., Chiang, T. -C., and Abbamonte, P. Tue . "Surface collective modes in the topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex". United States. doi:10.1103/PhysRevLett.115.257402. https://www.osti.gov/servlets/purl/1240702.
@article{osti_1240702,
title = {Surface collective modes in the topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex},
author = {Kogar, A. and Gu, G. and Vig, S. and Thaler, A. and Wong, M. H. and Xiao, Y. and Reig-i-Plessis, D. and Cho, G. Y. and Valla, T. and Pan, Z. and Schneeloch, J. and Zhong, R. and Hughes, T. L. and MacDougall, G. J. and Chiang, T. -C. and Abbamonte, P.},
abstractNote = {In this study, we used low-energy, momentum-resolved inelastic electron scattering to study surface collective modes of the three-dimensional topological insulators Bi2Se3 and Bi0.5Sb1.5Te3-xSex. Our goal was to identify the “spin plasmon” predicted by Raghu and co-workers [Phys. Rev. Lett. 104, 116401 (2010)]. Instead, we found that the primary collective mode is a surface plasmon arising from the bulk, free carriers in these materials. This excitation dominates the spectral weight in the bosonic function of the surface χ''(q,ω) at THz energy scales, and is the most likely origin of a quasiparticle dispersion kink observed in previous photoemission experiments. Our study suggests that the spin plasmon may mix with this other surface mode, calling for a more nuanced understanding of optical experiments in which the spin plasmon is reported to play a role.},
doi = {10.1103/PhysRevLett.115.257402},
journal = {Physical Review Letters},
number = 25,
volume = 115,
place = {United States},
year = {2015},
month = {12}
}

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Works referenced in this record:

Quantum Spin Hall Effect in Graphene
journal, November 2005


Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
journal, December 2006

  • Bernevig, B. A.; Hughes, T. L.; Zhang, S.-C.
  • Science, Vol. 314, Issue 5806, p. 1757-1761
  • DOI: 10.1126/science.1133734

Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface
journal, May 2009

  • Zhang, Haijun; Liu, Chao-Xing; Qi, Xiao-Liang
  • Nature Physics, Vol. 5, Issue 6, p. 438-442
  • DOI: 10.1038/nphys1270

Topological phases and the quantum spin Hall effect in three dimensions
journal, May 2009


Topological invariants of time-reversal-invariant band structures
journal, March 2007


A topological Dirac insulator in a quantum spin Hall phase
journal, April 2008

  • Hsieh, D.; Qian, D.; Wray, L.
  • Nature, Vol. 452, Issue 7190, p. 970-974
  • DOI: 10.1038/nature06843

Experimental Realization of a Three-Dimensional Topological Insulator, Bi2Te3
journal, June 2009


Observation of Unconventional Quantum Spin Textures in Topological Insulators
journal, February 2009


Observation of a large-gap topological-insulator class with a single Dirac cone on the surface
journal, May 2009

  • Xia, Y.; Qian, D.; Hsieh, D.
  • Nature Physics, Vol. 5, Issue 6, p. 398-402
  • DOI: 10.1038/nphys1274

Topological surface states protected from backscattering by chiral spin texture
journal, August 2009

  • Roushan, Pedram; Seo, Jungpil; Parker, Colin V.
  • Nature, Vol. 460, Issue 7259, p. 1106-1109
  • DOI: 10.1038/nature08308

STM Imaging of Electronic Waves on the Surface of Bi2Te3: Topologically Protected Surface States and Hexagonal Warping Effects
journal, January 2010

  • Alpichshev, Zhanybek; Analytis, J. G.; Chu, J.-H.
  • Physical Review Letters, Vol. 104, Issue 1, Article No. 016401
  • DOI: 10.1103/PhysRevLett.104.016401

Collective Modes of a Helical Liquid
journal, March 2010


Anomalous Dressing of Dirac Fermions in the Topological Surface State of Bi 2 Se 3 , Bi 2 Te 3 , and Cu-Doped Bi 2 Se 3
journal, May 2013


Observation of topological order in a superconducting doped topological insulator
journal, September 2010

  • Wray, L. Andrew; Xu, Su-Yang; Xia, Yuqi
  • Nature Physics, Vol. 6, Issue 11
  • DOI: 10.1038/nphys1762

Tunable Dirac Fermion Dynamics in Topological Insulators
journal, August 2013

  • Chen, Chaoyu; Xie, Zhuojin; Feng, Ya
  • Scientific Reports, Vol. 3, Issue 1
  • DOI: 10.1038/srep02411

Proposal for a topological plasmon spin rectifier
journal, January 2011

  • Appelbaum, Ian; Drew, H. D.; Fuhrer, M. S.
  • Applied Physics Letters, Vol. 98, Issue 2
  • DOI: 10.1063/1.3541545

Plasmonics in Dirac systems: from graphene to topological insulators
journal, March 2014


Observation of Dirac plasmons in a topological insulator
journal, July 2013


Observation of Magnetoplasmons in Bi 2 Se 3 Topological Insulator
journal, August 2015


Temperature-resolution anomalies in the reconstruction of time dynamics from energy-loss experiments
journal, June 2014

  • Kogar, Anshul; Vig, Sean; Gan, Yu
  • Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 47, Issue 12
  • DOI: 10.1088/0953-4075/47/12/124034

Bulk Fermi surface coexistence with Dirac surface state in Bi 2 Se 3 : A comparison of photoemission and Shubnikov–de Haas measurements
journal, May 2010


A tunable topological insulator in the spin helical Dirac transport regime
journal, July 2009


Surface Plasmons in Thin Films
journal, June 1969


Observation of spatial dispersion of surface plasmon mode in HREELS of heavily doped n-type InAs(001)
journal, February 1992


Optical and Electrical Investigations of n-Type Bi2Se3 Single Crystals
journal, February 1992

  • Stordeur, M.; Ketavong, K. K.; Priemuth, A.
  • physica status solidi (b), Vol. 169, Issue 2
  • DOI: 10.1002/pssb.2221690222

Far-infrared cyclotron resonance and Faraday effect in Bi 2 Se 3
journal, September 2010


Ultrafast terahertz dynamics of hot Dirac-electron surface scattering in the topological insulator Bi 2 Se 3
journal, April 2014


Ultraviolet and visible range plasmonics in the topological insulator Bi1.5Sb0.5Te1.8Se1.2
journal, October 2014

  • Ou, Jun-Yu; So, Jin-Kyu; Adamo, Giorgio
  • Nature Communications, Vol. 5, Issue 1
  • DOI: 10.1038/ncomms6139