Charge order driven by Fermi-arc instability in Bi2Sr(2-x)La(x)CuO(6+δ)
1Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
Science (New York, N.Y.)
|December 21, 2013
Summary
Researchers found a consistent charge order in cuprates, suggesting a common electronic state in underdoped materials. This discovery links charge order to the pseudogap regime, advancing superconductivity understanding.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Quantum Materials
Background:
- Superconductivity in cuprates is complex due to diverse electronic orders.
- Understanding these orders is key to unlocking high-temperature superconductivity.
Purpose of the Study:
- To investigate the nature of electronic orders in cuprates.
- To determine if a generic charge-ordered state exists in underdoped cuprates.
- To link charge order to the pseudogap phenomenon.
Main Methods:
- Combined resonant x-ray scattering (REXS), scanning-tunneling microscopy (STM), and angle-resolved photoemission spectroscopy (ARPES).
- Analyzed charge order in the Bi2Sr(2-x)La(x)CuO(6+δ) cuprate family.
- Examined order in both surface and bulk, and in momentum and real space.
Main Results:
- Observed a charge order consistently across surface and bulk.
- Identified wave vectors inconsistent with single-particle nesting but matching many-body instability models.
- Found charge order linked to Fermi arcs and the pseudogap regime.
Conclusions:
- A generic charge-ordered state is likely present in underdoped cuprates.
- This charge order is intimately connected to the pseudogap.
- Findings provide new insights into the origin of superconductivity in these materials.
