N ov 2 01 5 Magnetic field controlled charge density wave coupling in underdoped YBa 2 Cu

J. Chang, E. Blackburn, O. Ivashko, A. T. Holmes, N. B. Christensen, M. Hücker, Ruixing Liang, 7 D. A. Bonn, 7 W. N. Hardy, 7 U. Rütt, M. v. Zimmermann, E. M. Forgan, and S. M. Hayden Physik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom. European Spallation Source ERIC, Box 176, SE-221 00 Lund, Sweden Department of Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark. Condensed Matter Physics & Materials Science Dept., Brookhaven National Lab., Upton, NY 11973, USA. Department of Physics & Astronomy, University of British Columbia, Vancouver, Canada. Canadian Institute for Advanced Research, Toronto, Canada. Deutsches Elektronen-Synchrotron DESY, 22603 Hamburg, Germany. H. H. Wills Physics Laboratory, University of Bristol, Bristol, BS8 1TL, United Kingdom. (Dated: October 3, 2018)