title: Remarkable Stability of Charge Density Wave Order in La_{1.875}Ba_{0.125}CuO_{4}.
abstract: The occurrence of charge-density-wave (CDW) order in underdoped cuprates is now well established, although the precise nature of the CDW and its relationship with superconductivity is not. Theoretical proposals include contrasting ideas such as that pairing may be driven by CDW fluctuations or that static CDWs may intertwine with a spatially modulated superconducting wave function. We test the dynamics of CDW order in La_{1.825}Ba_{0.125}CuO_{4} by using x-ray photon correlation spectroscopy at the CDW wave vector, detected resonantly at the Cu L_{3} edge. We find that the CDW domains are strikingly static, with no evidence of significant fluctuations up to 2 ¾  h. We discuss the implications of these results for some of the competing theories.
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: X M
authors: XM
authors: Chen
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: V
authors: V
authors: Thampy
authors: National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: C
authors: C
authors: Mazzoli
authors: National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: A M
authors: AM
authors: Barbour
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: H
authors: H
authors: Miao
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: G D
authors: GD
authors: Gu
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: Y
authors: Y
authors: Cao
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: J M
authors: JM
authors: Tranquada
authors: Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: M P M
authors: MP
authors: Dean
authors: National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York 11973, USA.
authors: S B
authors: SB
authors: Wilkins