Abstract
We have observed a Fermi-surface (FS) induced lattice modulation in a superconductor with a wave vector along CuO chains; i.e., . The value of is twice the Fermi wave vector along connecting nearly nested FS “ridges.” The modulation exists only within O-vacancy-ordered islands [characterized by ] and persists well above and below . Our results are consistent with the presence of a FS-induced charge-density wave.
- Received 25 August 2008
DOI:https://doi.org/10.1103/PhysRevB.78.134526
©2008 American Physical Society