Remarkable Stability of Charge Density Wave Order in La_{1.875}Ba_{0.125}CuO_{4}
X M Chen1, V Thampy1, C Mazzoli2
1Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
Physical Review Letters
|October 30, 2016
Summary
Charge-density-wave (CDW) order in cuprates is well-known, but its dynamics remain unclear. This study reveals that CDW domains in La_{1.825}Ba_{0.125}CuO_{4} are static, offering insights into superconductivity theories.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Charge-density-wave (CDW) order is established in underdoped cuprates.
- The precise nature of CDW and its relation to superconductivity is debated.
- Theoretical models propose CDW fluctuations driving pairing or static CDWs intertwining with superconductivity.
Purpose of the Study:
- To investigate the dynamics of charge-density-wave (CDW) order in La_{1.825}Ba_{0.125}CuO_{4}.
- To test competing theoretical models regarding the interplay between CDW order and superconductivity.
Main Methods:
- Utilized x-ray photon correlation spectroscopy (XPCS).
- Resonant detection at the Copper (Cu) L3 edge.
- Focused on the charge-density-wave (CDW) wave vector.
Main Results:
- Observed that charge-density-wave (CDW) domains in La_{1.825}Ba_{0.125}CuO_{4} are strikingly static.
- Found no evidence of significant CDW fluctuations up to 2.75 hours.
- The static nature of CDW domains provides crucial data for theoretical models.
Conclusions:
- The static nature of CDW domains challenges theories relying on CDW fluctuations.
- Results suggest static CDWs may play a distinct role in the electronic properties of cuprates.
- Further research is needed to fully elucidate the complex relationship between CDW order and superconductivity.
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