2005/12/23 by Ivailo Dimov, Chetan Nayak, Dimov, Ivailo +1 · 1 citation
Chemistry · Physics and Astronomy · #Advanced Chemical Physics Studies #FOS: Physical sciences #Inorganic Fluorides and Related Compounds #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0512627
12 pages, 14 figures; Reorganized Refs. and added Ref. 25 plus a footnote
openalex publication_date 2005/12/23 · arxiv created 2006/03/16 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider various incommensurate (IC) order parameters for electrons on a square lattice which reduce to dx2-y2-density wave (DDW) order when the ordering wavevector \bf Q→ (π,π). We describe the associated charge and current distributions and their experimental signatures. Such orders can arise at the mean-field level in extended Hubbard models. We compare the phase diagrams of these models with experiments in the underdoped cuprates, where (1) DDW order is a possible explanation of the pseudogap, and (2) there are experimental indications of incommensurability. We find various types of IC DDW and discuss their possible relevance to the physics of the cuprates. Our main finding is that IC DDW order is generally accompanied by superconducting order, but the magnitude of the IC wavevector can be small. A comparison with the analogous AF-ICSDW transition is given.