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arXiv:1604.01499 [cond-mat.str-el]AbstractReferencesReviewsResources

The amplitudes and the structure of the charge density wave in YBCO

Yaroslav A. Kharkov, Oleg P. Sushkov

Published 2016-04-06Version 1

We find unknown s- and d-wave amplitudes of the recently discovered charge density wave (CDW) in underdoped cuprates. To do so we perform a combined analysis of experimental data for ortho-II YBa$_2$Cu$_3$O$_{y}$. The analysis includes data on nuclear quadrupole resonance, resonant inelastic X-ray scattering, and hard X-ray diffraction. The amplitude of doping modulation found in our analysis is $3.5\cdot 10^{-3}$ in a low magnetic field and $T=60$K, the amplitude is $6.5\cdot 10^{-3}$ in a magnetic field of 30T and $T=1.3$K. The values are in units of elementary charge per unit cell of the CuO$_2$ plane. We show that the data rule out a checkerboard pattern, and we also argue that the data rule out mechanisms of the CDW which do not include phonons.

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