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

Title: Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbT e 3

Abstract

We present a high-energy-resolution inelastic x-ray scattering investigation of the soft phonon mode in the charge-density-wave (CDW) system TbTe3. We analyze our data based on lattice dynamical calculations using density-functional-perturbation theory and find clear evidence that strongly momentum-dependent electron-phonon coupling defines the periodicity of the CDW superstructure: Our experiment reveals strong phonon softening and increased phonon linewidths over a large part in reciprocal space adjacent to the CDW ordering vector q(CDW) = (0,0,0.3). Further, q(CDW) is clearly offset from the wave vector of (weak) Fermi surface nesting q(FS) = (0,0,0.25), and our detailed analysis indicates that electron-phonon coupling is responsible for this shift. Hence, we can add TbTe3, which was previously considered as a canonical CDW compound following the Peierls scenario, to the list of distinct charge-density-wave materials characterized by momentum-dependent electron-phonon coupling.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1391824
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 91; Journal Issue: 23; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Maschek, M., Rosenkranz, S., Heid, R., Said, A. H., Giraldo-Gallo, P., Fisher, I. R., and Weber, F. Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbTe3. United States: N. p., 2015. Web. doi:10.1103/PhysRevB.91.235146.
Maschek, M., Rosenkranz, S., Heid, R., Said, A. H., Giraldo-Gallo, P., Fisher, I. R., & Weber, F. Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbTe3. United States. doi:10.1103/PhysRevB.91.235146.
Maschek, M., Rosenkranz, S., Heid, R., Said, A. H., Giraldo-Gallo, P., Fisher, I. R., and Weber, F. Mon . "Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbTe3". United States. doi:10.1103/PhysRevB.91.235146.
@article{osti_1391824,
title = {Wave-vector-dependent electron-phonon coupling and the charge-density-wave transition in TbTe3},
author = {Maschek, M. and Rosenkranz, S. and Heid, R. and Said, A. H. and Giraldo-Gallo, P. and Fisher, I. R. and Weber, F.},
abstractNote = {We present a high-energy-resolution inelastic x-ray scattering investigation of the soft phonon mode in the charge-density-wave (CDW) system TbTe3. We analyze our data based on lattice dynamical calculations using density-functional-perturbation theory and find clear evidence that strongly momentum-dependent electron-phonon coupling defines the periodicity of the CDW superstructure: Our experiment reveals strong phonon softening and increased phonon linewidths over a large part in reciprocal space adjacent to the CDW ordering vector q(CDW) = (0,0,0.3). Further, q(CDW) is clearly offset from the wave vector of (weak) Fermi surface nesting q(FS) = (0,0,0.25), and our detailed analysis indicates that electron-phonon coupling is responsible for this shift. Hence, we can add TbTe3, which was previously considered as a canonical CDW compound following the Peierls scenario, to the list of distinct charge-density-wave materials characterized by momentum-dependent electron-phonon coupling.},
doi = {10.1103/PhysRevB.91.235146},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 23,
volume = 91,
place = {United States},
year = {2015},
month = {6}
}

Works referenced in this record:

New developments in fabrication of high-energy-resolution analyzers for inelastic X-ray spectroscopy
journal, March 2011

  • Said, Ayman H.; Sinn, Harald; Divan, Ralu
  • Journal of Synchrotron Radiation, Vol. 18, Issue 3
  • DOI: 10.1107/S0909049511001828

Magnetic properties of the charge density wave compounds R Te 3 ( R = Y , La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, and Tm)
journal, July 2008


Electron-Phonon Coupling and the Soft Phonon Mode in TiSe 2
journal, December 2011


Fermi Surface Reconstruction in the CDW State of C e T e 3 Observed by Photoemission
journal, September 2004


Spin density wave and soft phonon mode from nesting Fermi surfaces
journal, April 1973


Phonon line shapes and excitation energies
journal, June 1997


Fermi-surface nesting and the origin of the charge-density wave in Nb Se 2
journal, May 2006


Alternative route to charge density wave formation in multiband systems
journal, December 2012

  • Eiter, H. -M.; Lavagnini, M.; Hackl, R.
  • Proceedings of the National Academy of Sciences, Vol. 110, Issue 1
  • DOI: 10.1073/pnas.1214745110

Linear response in a density-functional mixed-basis approach
journal, August 1999


Anharmonic suppression of charge density waves in 2 H -NbS 2
journal, October 2012


Fermi surface nesting and the origin of charge density waves in metals
journal, April 2008


Optical phonons and the soft mode in 2 H -NbSe 2
journal, June 2013


Explicit local exchange-correlation potentials
journal, October 1971


Optimally smooth norm-conserving pseudopotentials
journal, December 1985


Extended Phonon Collapse and the Origin of the Charge-Density Wave in 2 H NbSe 2
journal, September 2011


Six-reflection meV-monochromator for synchrotron radiation
journal, May 2011