skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Ultrafast manipulation of topologically enhanced surface transport driven by mid-infrared and terahertz pulses in Bi2Se3

Journal Article · · Nature Communications

Topology-protected surface transport of ultimate thinness in three-dimensional topological insulators (TIs) is breaking new ground in quantum science and technology. Yet a challenge remains on how to disentangle and selectively control surface helical spin transport from the bulk contribution. Here we use the mid-infrared and terahertz (THz) photoexcitation of exclusive intraband transitions to enable ultrafast manipulation of surface THz conductivity in Bi2Se3. The unique, transient electronic state is characterized by frequency-dependent carrier relaxations that directly distinguish the faster surface channel than the bulk with no complication from interband excitations or need for reduced bulk doping. We determine the topological enhancement ratio between bulk and surface scattering rates, i.e., γBSSS ~3.80 in equilibrium. As a result, the ultra-broadband, wavelength-selective pumping may be applied to emerging topological semimetals for separation and control of the protected transport connected with the Weyl nodes from other bulk bands.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States); Univ. of Alabama, Birmingham, AL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-07CH11358; SC0019137
OSTI ID:
1494932
Alternate ID(s):
OSTI ID: 1971746
Report Number(s):
IS-J-9887
Journal Information:
Nature Communications, Vol. 10, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 60 works
Citation information provided by
Web of Science

References (54)

Ultrafast Surface State Spin-Carrier Dynamics in the Topological Insulator Bi 2 Te 2 Se journal July 2018
Terahertz Response and Colossal Kerr Rotation from the Surface States of the Topological Insulator Bi 2 Se 3 journal February 2012
Quantized Faraday and Kerr rotation and axion electrodynamics of a 3D topological insulator journal December 2016
Topological Materials: Weyl Semimetals journal March 2017
Oscillatory crossover from two-dimensional to three-dimensional topological insulators journal January 2010
Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 topological insulator journal April 2016
Quantum Oscillations and Hall Anomaly of Surface States in the Topological Insulator Bi2Te3 journal July 2010
A tunable topological insulator in the spin helical Dirac transport regime text January 2009
Lieb-Robinson Bounds and the Generation of Correlations and Topological Quantum Order journal July 2006
A topological Dirac insulator in a quantum spin Hall phase journal April 2008
Time-resolved terahertz dynamics in thin films of the topological insulator Bi 2 Se 3 journal January 2015
The quantum spin Hall effect and topological insulators journal January 2010
Topological response in Weyl semimetals and the chiral anomaly journal September 2012
Ultrafast softening in InMnAs journal January 2004
Nonequilibrium Pair Breaking in Ba ( Fe 1 x Co x ) 2 As 2 Superconductors: Evidence for Formation of a Photoinduced Excitonic State journal December 2018
Crossover of the three-dimensional topological insulator Bi2Se3 to the two-dimensional limit journal June 2010
Generation of Transient Photocurrents in the Topological Surface State of Sb 2 Te 3 by Direct Optical Excitation with Midinfrared Pulses journal February 2016
Lieb-Robinson bounds and the generation of correlations and topological quantum order text January 2006
A tunable topological insulator in the spin helical Dirac transport regime journal July 2009
Observation of the universal magnetoelectric effect in a 3D topological insulator text January 2016
Probing and controlling terahertz-driven structural dynamics with surface sensitivity preprint January 2016
Strong nonlinear terahertz response induced by Dirac surface states in Bi2Se3 Topological Insulator text January 2018
Critical speeding up of nonequilibrium electronic relaxation near nematic phase transition in unstrained Ba( Fe 1 x Co x ) 2 As 2 journal April 2017
The birth of topological insulators journal March 2010
The quantum spin Hall effect and topological insulators text January 2010
Ultrafast terahertz probes of interacting dark excitons in chirality-specific semiconducting single-walled carbon nanotubes text January 2014
Z2 Topological Order and the Quantum Spin Hall Effect journal September 2005
A sudden collapse in the transport lifetime across the topological phase transition in (Bi1−xInx)2Se3 journal June 2013
Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides journal February 2014
Measurement of Intrinsic Dirac Fermion Cooling on the Surface of the Topological Insulator Bi 2 Se 3 Using Time-Resolved and Angle-Resolved Photoemission Spectroscopy journal September 2012
Colloquium: Topological insulators journal November 2010
Record Surface State Mobility and Quantum Hall Effect in Topological Insulator Thin Films via Interface Engineering journal November 2015
Topological insulators in Bi2Se3, Bi2Te3 and Sb2Te3 with a single Dirac cone on the surface journal May 2009
Electron scattering by ionized impurities in semiconductors journal October 1981
Influence of helical spin structure on the magnetoresistance of an ideal topological insulator journal October 2017
A sudden collapse in the transport lifetime across the topological phase transition in $(Bi_{1-x}In_x)_2 Se_3$ text January 2012
Helical Liquid and the Edge of Quantum Spin Hall Systems journal March 2006
Terahertz-light quantum tuning of a metastable emergent phase hidden by superconductivity journal June 2018
Ultrafast terahertz dynamics of hot Dirac-electron surface scattering in the topological insulator Bi 2 Se 3 journal April 2014
Topological invariants of time-reversal-invariant band structures text January 2006
Observation of the universal magnetoelectric effect in a 3D topological insulator journal May 2017
Massive Dirac fermions and spin physics in an ultrathin film of topological insulator text January 2009
Topological Materials: Weyl Semimetals text January 2016
Topological invariants of time-reversal-invariant band structures journal March 2007
Terahertz spectroscopy on Faraday and Kerr rotations in a quantum anomalous Hall state journal July 2016
The Helical Liquid and the Edge of Quantum Spin Hall Systems text January 2005
Ultrafast Terahertz Probes of Interacting Dark Excitons in Chirality-Specific Semiconducting Single-Walled Carbon Nanotubes journal March 2015
Ultrafast observation of critical nematic fluctuations and giant magnetoelastic coupling in iron pnictides text January 2014
Time-resolved terahertz dynamics in thin films of the topological insulator Bi$_{2}$Se$_3$ text January 2014
Massive Dirac fermions and spin physics in an ultrathin film of topological insulator journal March 2010
Anomalous finite size effects on surface states in the topological insulator Bi 2 Se 3 journal November 2009
A topological Dirac insulator in a quantum spin Hall phase : Experimental observation of first strong topological insulator text January 2009
Influence of Helical Spin Structure on the Magnetoresistance of an Ideal Topological Insulator text January 2014
Record Surface State Mobility and Quantum Hall Effect in Topological Insulator Thin Films via Interface Engineering text January 2015

Cited By (8)

Light control of surface–bulk coupling by terahertz vibrational coherence in a topological insulator journal February 2020
Generation of high-quality terahertz OAM mode based on soft-aperture difference frequency generation journal January 2019
Influence of a substrate on ultrafast interfacial charge transfer and dynamical interlayer excitons in monolayer WSe 2 /graphene heterostructures journal January 2020
Accelerating terahertz all-optical modulation by hot carriers effects of silver nanorods in PVA film journal July 2019
Temperature and excitation wavelength dependence of circular and linear photogalvanic effect in a three dimensional topological insulator Bi 2 Se 3 journal July 2019
Ultrafast nonthermal terahertz electrodynamics and possible quantum energy transfer in the Nb 3 Sn superconductor journal March 2019
Helicity-dependent terahertz photocurrent and phonon dynamics in hybrid metal halide perovskites journal December 2019
Lightwave-driven gapless superconductivity and forbidden quantum beats by terahertz symmetry breaking journal July 2019

Figures / Tables (6)