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D. LeBoeuf1,*, C. Proust1, F. Laliberté1, B. Borgnic1 , M. Frachet1 , J. Porras2 , T. Loew2 , M. Le Tacon2 , B. Keimer2
1Laboratoire National de Champs Magnétiques Intense, CNRS, EMFL, France
2Max Planck Institut, Stuttgart, Germany
Email: * david.leboeuf@lncmi.cnrs.fr
In underdoped YBCO, short range charge density wave correlations appear well above the critical temperature Tc1,2. The charge modulations are mostly bidimensional. Below Tc, the application of a magnetic field causes change in the charge order and reveal a three dimensional and rather long range order, as seen by NMR3, sound velocity4 and x-ray measurements5,6. Here we report a doping dependence of high fields ultrasonic measurements in underdoped YBCO to determine the phase diagram and the critical doping where charge order disappears.
References
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