TY - JOUR
T1 - Structural contributions to the pressure-tuned charge-density-wave to superconductor transition in ZrTe3
T2 - Raman scattering studies
AU - Gleason, S. L.
AU - Gim, Y.
AU - Byrum, T.
AU - Kogar, A.
AU - Abbamonte, P.
AU - Fradkin, E.
AU - Macdougall, G. J.
AU - Van Harlingen, D. J.
AU - Zhu, Xiangde
AU - Petrovic, C.
AU - Cooper, S. L.
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/4/16
Y1 - 2015/4/16
N2 - Superconductivity evolves as functions of pressure or doping from charge-ordered phases in a variety of strongly correlated systems, suggesting that there may be universal characteristics associated with the competition between superconductivity and charge order in these materials. We present an inelastic light (Raman) scattering study of the structural changes that precede the pressure-tuned charge-density-wave (CDW) to superconductor transition in one such system, ZrTe3. In certain phonon bands, we observe dramatic linewidth reductions that accompany CDW formation, indicating that these phonons couple strongly to the electronic degrees of freedom associated with the CDW. The same phonon bands, which represent internal vibrations of ZrTe3 prismatic rods, are suppressed at pressures above ∼10kbar, indicating a loss of long-range order within the rods, specifically amongst intrarod Zr-Te bonds. These results suggest that the pressure-induced suppression of CDW order observed in ZrTe3 is structurally driven and provide insights into the origin of pressure-induced superconductivity in this material.
AB - Superconductivity evolves as functions of pressure or doping from charge-ordered phases in a variety of strongly correlated systems, suggesting that there may be universal characteristics associated with the competition between superconductivity and charge order in these materials. We present an inelastic light (Raman) scattering study of the structural changes that precede the pressure-tuned charge-density-wave (CDW) to superconductor transition in one such system, ZrTe3. In certain phonon bands, we observe dramatic linewidth reductions that accompany CDW formation, indicating that these phonons couple strongly to the electronic degrees of freedom associated with the CDW. The same phonon bands, which represent internal vibrations of ZrTe3 prismatic rods, are suppressed at pressures above ∼10kbar, indicating a loss of long-range order within the rods, specifically amongst intrarod Zr-Te bonds. These results suggest that the pressure-induced suppression of CDW order observed in ZrTe3 is structurally driven and provide insights into the origin of pressure-induced superconductivity in this material.
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U2 - 10.1103/PhysRevB.91.155124
DO - 10.1103/PhysRevB.91.155124
M3 - Article
AN - SCOPUS:84929095746
SN - 1098-0121
VL - 91
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 15
M1 - 155124
ER -