A new collective mode in YBCO observed by time-domain reflectometry

J. P. Hinton; J. D. Koralek; Y. M. Lu; A. Vishwanath; J. Orenstein; D. A. Bonn; W. N. Hardy; Ruixing Liang

doi:10.1103/PhysRevB.88.060508

A new collective mode in YBCO observed by time-domain reflectometry

Superconductivity 2015-06-15 v1

Authors: J. P. Hinton , J. D. Koralek , Y. M. Lu , A. Vishwanath , J. Orenstein , D. A. Bonn , W. N. Hardy , Ruixing Liang

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Abstract

We report the observation of coherent oscillations associated with charge density wave (CDW) order in the underdoped cuprate superconductor YBa2Cu3O6+x by time-resolved optical reflectivity. Oscillations with frequency 1.87 THz onset at approximately 105 K and 130 K for dopings of x = 0.67 (ortho-VIII) and x = 0.75 (ortho-III), respectively. Upon cooling below the superconducting critical temperature (T_c), the oscillation amplitude is enhanced, the phase shifts by \pi, and the frequency softens by \delta \nu / \nu~7%. A bi-quadratically coupled Landau-Ginzburg model qualitatively describes this behavior as arising from competition between superconducting and CDW orders.

Keywords

high-temperature superconductivity charge density wave cuprate superconductors

Cite

@article{arxiv.1305.1361,
  title  = {A new collective mode in YBCO observed by time-domain reflectometry},
  author = {J. P. Hinton and J. D. Koralek and Y. M. Lu and A. Vishwanath and J. Orenstein and D. A. Bonn and W. N. Hardy and Ruixing Liang},
  journal= {arXiv preprint arXiv:1305.1361},
  year   = {2015}
}

A new collective mode in YBCO observed by time-domain reflectometry

Abstract

Keywords

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