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

Title: Direct Observation of Coherent Longitudinal and Shear Acoustic Phonons in TaAs Using Ultrafast X-Ray Diffraction

Journal Article · · Physical Review Letters
ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [1];  [5];  [2];  [5];  [6];  [6];  [6]; ORCiD logo [6];  [3];  [1]; ORCiD logo [1]; ORCiD logo [6];  [3];  [5];  [5] more »;  [1] « less
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  4. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Univ. of Rennes (France)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., CA (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China)

Here, using femtosecond time-resolved x-ray diffraction, we investigated optically excited coherent acoustic phonons in the Weyl semimetal TaAs. The low symmetry of the (112) surface probed in our experiment enables the simultaneous excitation of longitudinal and shear acoustic modes, whose dispersion closely matches our simulations. We observed an asymmetry in the spectral line shape of the longitudinal mode that is notably absent from the shear mode, suggesting a time-dependent frequency chirp that is likely driven by photoinduced carrier diffusion. We argue on the basis of symmetry that these acoustic deformations can transiently alter the electronic structure near the Weyl points and support this with model calculations. Our study underscores the benefit of using off-axis crystal orientations when optically exciting acoustic deformations in topological semimetals, allowing one to transiently change their crystal and electronic structures.

Research Organization:
Ames Lab., Ames, IA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Energy Frontier Research Centers (EFRC) (United States). Center for Advancement of Topological Semimetals (CATS); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC02-07CH11358; 2018BU0083; 2018LANLBES16; AC02-76SF00515; SC0019126; AC02-05CH11231
OSTI ID:
1864268
Alternate ID(s):
OSTI ID: 1871598; OSTI ID: 1878047
Report Number(s):
IS-J-10,781; LA-UR-20-29013; TRN: US2305963
Journal Information:
Physical Review Letters, Vol. 128, Issue 15; ISSN 0031-9007
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (53)

Linac Coherent Light Source: The first five years journal March 2016
Phonon and thermal expansion properties in Weyl semimetals MX (M = Nb, Ta; X = P, As): ab initio studies journal January 2016
Observation of the Chiral-Anomaly-Induced Negative Magnetoresistance in 3D Weyl Semimetal TaAs journal August 2015
The influence of charge and magnetic order on polaron and acoustic phonon dynamics in LuFe 2 O 4 journal July 2015
Time-Resolved X-Ray Diffraction from Coherent Phonons during a Laser-Induced Phase Transition journal January 2000
Achieving few-femtosecond time-sorting at hard X-ray free-electron lasers journal February 2013
Study of Phonon Dispersion in Silicon and Germanium at Long Wavelengths Using Picosecond Ultrasonics journal June 2000
Probing Impulsive Strain Propagation with X-Ray Pulses journal April 2001
Extended two-temperature model for ultrafast thermal response of band gap materials upon impulsive optical excitation journal November 2015
Theory for displacive excitation of coherent phonons journal January 1992
Photoexcitation of gigahertz longitudinal and shear acoustic waves in BiFeO 3 multiferroic single crystal journal May 2012
QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials journal September 2009
Crystal truncation rods and surface roughness journal March 1986
Topological Phase Transition and Phonon-Space Dirac Topology Surfaces in ZrTe 5 journal January 2021
Surface motion induced by laser action on opaque anisotropic crystals journal April 2005
Expansive open Fermi arcs and connectivity changes induced by infrared phonons in Zr Te 5 journal February 2021
Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal journal February 2016
Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides journal March 2015
Time-domain Brillouin scattering for the determination of laser-induced temperature gradients in liquids journal July 2017
Tracking Ultrafast Photocurrents in the Weyl Semimetal TaAs Using THz Emission Spectroscopy journal May 2019
Optimized norm-conserving Vanderbilt pseudopotentials journal August 2013
Comparative study on structural, elastic, dynamical, and thermodynamic properties of Weyl semimetals MX (M = Ta or Nb; X = As or P) journal September 2017
The ultrafast Einstein–de Haas effect journal January 2019
Surface generation and detection of phonons by picosecond light pulses journal September 1986
Pseudo-electromagnetic fields in 3D topological semimetals journal November 2019
Evidence for a strain-tuned topological phase transition in ZrTe 5 journal August 2019
A light-induced phononic symmetry switch and giant dissipationless topological photocurrent in ZrTe5 journal January 2021
[INVITED] Laser generation and detection of ultrafast shear acoustic waves in solids and liquids journal September 2016
Coherent Shear Phonon Generation and Detection with Ultrashort Optical Pulses journal August 2004
Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs journal November 2021
Strong spin-phonon coupling unveiled by coherent phonon oscillations in Ca 2 RuO 4 journal April 2019
Mechanical spectra of glass-forming liquids. II. Gigahertz-frequency longitudinal and shear acoustic dynamics in glycerol and DC704 studied by time-domain Brillouin scattering journal March 2013
Phonons and related crystal properties from density-functional perturbation theory journal July 2001
An ultrafast symmetry switch in a Weyl semimetal journal January 2019
Uncovering electron-phonon scattering and phonon dynamics in type-I Weyl semimetals journal December 2019
Ultrafast light-induced shear strain probed by time-resolved x-ray diffraction: Multiferroic BiFeO 3 as a case study journal December 2020
PREPARATION AND CHARACTERIZATION OF CRYSTALS OF MX- AND MX 2 -TYPE ARSENIDES OF NIOBIUM AND TANTALUM journal March 1964
Phonon Spectroscopy with Chirped Shear and Compressive Acoustic Pulses journal December 2017
Time-resolved vibrational spectroscopy in the impulsive limit journal January 1994
Using coherent phonons for ultrafast control of the Dirac node of SrMnSb 2 journal October 2018
Discovery of a Weyl fermion semimetal and topological Fermi arcs journal July 2015
Physical mechanisms of coherent acoustic phonons generation by ultrafast laser action journal February 2015
Effects of Configuration Interaction on Intensities and Phase Shifts journal December 1961
Nonlinear Acoustics at GHz Frequencies in a Viscoelastic Fragile Glass Former journal February 2015
Generation and detection of plane coherent shear picosecond acoustic pulses by lasers: Experiment and theory journal May 2007
Temperature Dependence of Compressional and Shear wave Velocities in Rocks journal August 1977
Generation mechanism of terahertz coherent acoustic phonons in Fe journal June 2016
Ambipolar diffusion of photoexcited carriers in bulk GaAs journal December 2010
Tuning and Tracking of Coherent Shear Waves in Molecular Films journal August 2018
Measurements of nonequilibrium interatomic forces using time-domain x-ray scattering journal May 2021
Giant ultrafast photo-induced shear strain in ferroelectric BiFeO3 journal July 2014
Similar ultrafast dynamics of several dissimilar Dirac and Weyl semimetals journal December 2017
A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class journal June 2015

Similar Records

Tracking Ultrafast Photocurrents in the Weyl Semimetal TaAs Using THz Emission Spectroscopy
Journal Article · Wed May 15 00:00:00 EDT 2019 · Physical Review Letters · OSTI ID:1864268

Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs
Journal Article · Mon Nov 08 00:00:00 EST 2021 · Nature Materials · OSTI ID:1864268

Field-angle dependence of sound velocity in the Weyl semimetal TaAs
Journal Article · Thu Sep 03 00:00:00 EDT 2020 · Physical Review B · OSTI ID:1864268