"Coincident onset of charge-density-wave order at a quantum critical point in underdoped YBa2Cu3Ox"

H. Jang: W.-S. Lee, S. Song, H. Nojiri, S. Matsuzawa, H. Yasumura, H. Huang, Y.-J. Liu, J. Porras, M. Minola, B. Keimer, J. Hastings, D. Zhu, T. P. Devereaux, Z.-X. Shen, C.-C. Kao, and J.-S. Le; Physical Review B, 06/14/18.

Additional Authors: W.-S. Lee, S. Song, H. Nojiri, S. Matsuzawa, H. Yasumura, H. Huang, Y.-J. Liu, J. Porras, M. Minola, B. Keimer, J. Hastings, D. Zhu, T. P. Devereaux, Z.-X. Shen, C.-C. Kao, and J.-S. Le

Abstract:

The recently demonstrated x-ray scattering approach using a free electron laser with a high field pulsed magnet has opened new opportunities to explore the charge-density-wave (CDW) order in cuprate high temperature superconductors. Using this approach, we substantially degrade the superconductivity with magnetic fields up to 33 T to investigate the onset of CDW order in YBa2Cu3Ox at low temperatures near a putative quantum critical point (QCP) at p1∼0.08 holes per Cu. We find no CDW can be detected in a sample with a doping concentration smaller than p1. Our results indicate that the onset of the CDW ground state lies inside the zero-field superconducting dome, and broken translational symmetry is associated with the putative QCP at p1.