Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in V3Si

Sauer, A.; Zocco, D. A.; Said, A. H.; Heid, R.; Böhmer, A.; Weber, F.

doi:10.1103/PhysRevB.99.134511

Title: Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in $V_{3} Si$

Abstract

Phonon measurements in the A15-type superconductors were complicated in the past because of the unavailability of large single crystals for inelastic neutron scattering, e.g., in the case of Nb₃Sn, or unfavorable neutron scattering properties in the case of V₃Si. Hence, only few studies of the lattice dynamical properties with momentum resolved methods were published, in particular below the superconducting transition temperature T_c. Here, we overcome these problems by employing inelastic x-ray scattering and report a combined experimental and theoretical investigation of lattice dynamics in V₃Si with the focus on the temperature-dependent properties of low-energy acoustic phonon modes in several high-symmetry directions. We paid particular attention to the evolution of the soft phonon mode of the structural phase transition observed in our sample at T_s = 18.9 K, i.e., just above the measured superconducting phase transition at T_c = 16.8 K. Theoretically, we predict lattice dynamics including electron-phonon coupling based on density-functional-perturbation theory and discuss the relevance of the soft phonon mode with regard to the value of T_c. Furthermore, we explain superconductivity-induced anomalies in the lineshape of several acoustic phonon modes using a model proposed by Allen et al., [Phys. Rev. B 56, 5552 (19 7)].

Authors:

Sauer, A. ^[1]; Zocco, D. A. ^[2]; Said, A. H. ^[3]; Heid, R. ^[1]; Böhmer, A. ^[1]; Weber, F. ^[1]

Karlsruhe Inst. of Technology (KIT) (Germany)
Karlsruhe Inst. of Technology (KIT) (Germany); Vienna Univ. of Technology (Austria). Inst. of Solid State Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Publication Date:: Mon Apr 15 00:00:00 EDT 2019

Research Org.:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Org.:: Helmholtz Association of German Research Centres; USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1510474

Alternate Identifier(s):: OSTI ID: 1507176

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review B

Additional Journal Information:: Journal Volume: 99; Journal Issue: 13; Journal ID: ISSN 2469-9950

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats


                    Sauer, A., Zocco, D. A., Said, A. H., Heid, R., Böhmer, A., and Weber, F. Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in V3Si.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevB.99.134511.

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                    Sauer, A., Zocco, D. A., Said, A. H., Heid, R., Böhmer, A., & Weber, F. Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in V3Si.  United States.  https://doi.org/10.1103/PhysRevB.99.134511

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                    Sauer, A., Zocco, D. A., Said, A. H., Heid, R., Böhmer, A., and Weber, F. Mon .  
"Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in V3Si".  United States.  https://doi.org/10.1103/PhysRevB.99.134511.  https://www.osti.gov/servlets/purl/1510474.

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@article{osti_1510474,

  title        = {Electron-phonon coupling and superconductivity-induced distortion of the phonon lineshape in V3Si},

  author       = {Sauer, A. and Zocco, D. A. and Said, A. H. and Heid, R. and Böhmer, A. and Weber, F.},

  abstractNote = {Phonon measurements in the A15-type superconductors were complicated in the past because of the unavailability of large single crystals for inelastic neutron scattering, e.g., in the case of Nb3Sn, or unfavorable neutron scattering properties in the case of V3Si. Hence, only few studies of the lattice dynamical properties with momentum resolved methods were published, in particular below the superconducting transition temperature Tc. Here, we overcome these problems by employing inelastic x-ray scattering and report a combined experimental and theoretical investigation of lattice dynamics in V3Si with the focus on the temperature-dependent properties of low-energy acoustic phonon modes in several high-symmetry directions. We paid particular attention to the evolution of the soft phonon mode of the structural phase transition observed in our sample at Ts = 18.9 K, i.e., just above the measured superconducting phase transition at Tc = 16.8 K. Theoretically, we predict lattice dynamics including electron-phonon coupling based on density-functional-perturbation theory and discuss the relevance of the soft phonon mode with regard to the value of Tc. Furthermore, we explain superconductivity-induced anomalies in the lineshape of several acoustic phonon modes using a model proposed by Allen et al., [Phys. Rev. B 56, 5552 (19 7)].},

  doi          = {10.1103/PhysRevB.99.134511},

  journal      = {Physical Review B},

  number       = 13,

  volume       = 99,

  place        = {United States},

  year         = {Mon Apr 15 00:00:00 EDT 2019},

  month        = {Mon Apr 15 00:00:00 EDT 2019}

}

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Superconducting energy gap of $2 H − NbS e_{2}$ in phonon spectroscopy
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Strong anharmonicity induces quantum melting of charge density wave in $2 H - {NbSe}_{2}$ under pressure
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Pressure dependence of the charge-density-wave and superconducting states in ${GdTe}_{3}, {TbTe}_{3}$ , and ${DyTe}_{3}$
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Optical phonons and the soft mode in 2 $H$ -NbSe $_{2}$
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Neutron scattering study of the lattice dynamical phase transition in V3Si
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Neutron Scattering with a Triple-Axis Spectrometer
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Energy Gaps and Kohn Anomalies in Elemental Superconductors
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Neutron-scattering profile of $Q \neq 0$ phonons in BCS superconductors
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Six-reflection meV-monochromator for synchrotron radiation
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Superconductivity-induced distortions of phonon lineshapes in niobium
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Gaps and kinks in the electronic structure of the superconductor $2 H$ -NbSe $_{2}$ from angle-resolved photoemission at 1 K
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Direct Observation of the Superconducting Gap in Phonon Spectra
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The Low‐Temperature Transport Properties of NbSe ₂
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New developments in fabrication of high-energy-resolution analyzers for inelastic X-ray spectroscopy
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Experimental characterization of the flux-line lattice in superconducting V<inf>3</inf>Si
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Superconductivity and hybrid soft modes in $Ti {Se}_{2}$
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Structural instability and superconductivity in A-15 compounds
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Direct Observation of Enhanced Lattice Stability in $V_{3}$ Si under Hydrostatic Pressure
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Phonon softening of ${Nb}_{3}$ Sn in $[ζ ζ ζ] T$ modes
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From Mott state to superconductivity in 1T-TaS2
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Study of Superlattice Formation in $2 H$ -Nb ${Se}_{2}$ and $2 H$ -Ta ${Se}_{2}$ by Neutron Scattering
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Anomalous Phonon Scattering Below $T_{c}$ in $Y {Ni}_{2} {}^{11}B_{2} C$
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Superconducting and Martensitic Transitions of V ₃ Si and Nb ₃ Sn under High Pressure
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Inelastic X-ray scattering in YBa2Cu3O6.6 reveals giant phonon anomalies and elastic central peak due to charge-density-wave formation
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Three-dimensional Fermi surface of $2 H - NbS e_{2}$ : Implications for the mechanism of charge density waves
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Electron-Phonon Coupling and the Soft Phonon Mode in ${TiSe}_{2}$
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Superconductivity in CuxTiSe2
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Superconductivity with onset above 23° K in NbGe sputtered films
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Inelastic-Neutron-Scattering Study of Acoustic Phonons in ${Nb}_{3}$ Sn
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Momentum-Resolved Electron-Phonon Interaction in Lead Determined by Neutron Resonance Spin-Echo Spectroscopy
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Energy gaps of the $A - 15$ superconductors ${Nb}_{3}$ Sn, $V_{3}$ Si, and ${Nb}_{3}$ Ge measured by tunneling
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Extended Phonon Collapse and the Origin of the Charge-Density Wave in $2 H − {NbSe}_{2}$
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Critical fields, Pauli paramagnetic limiting, and material parameters of ${Nb}_{3}$ Sn and $V_{3}$ Si
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Adiabatic Electron-Phonon Interaction and High-Temperature Thermodynamics of $A 15$ Compounds
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Superconducting energy gap of $2H$-NbSe$_2$ in phonon spectroscopy
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Three-dimensional Fermi surface of 2H-NbSe$_2$ - Implications for the mechanism of charge density waves
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Superconductivity in Cu_xTiSe_2
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