2006/11/17 by T. Valla, А. В. Федоров, A. V. Fedorov +4 · 250 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Atomic physics #Charge (physics) #Charge density wave #Condensed matter physics #Cooper pair #Cuprate #Density of states #Electron #Electronic structure #Fermi level #Fermi surface #Ground state #Magnetic and transport properties of perovskites and related materials #Phase (matter) #Physics #Physics of Superconductivity and Magnetism #Pseudogap #Quantum mechanics #Quantum tunnelling #Scanning tunneling microscope #Spin (aerodynamics) #Superconductivity #Symmetry (geometry) #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1126/science.1134742
published in Science 314(5807), 1914-1916 (American Association for the Advancement of Science) · This is the author's version of the work
openalex publication_date 2006/11/17 · arxiv created 2006/12/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present studies of the electronic structure of La(2-x)BaxCuO4, a system where the superconductivity is strongly suppressed as static spin and charge orders or "stripes" develop near the doping level of x = (1/8). Using angle-resolved photoemission and scanning tunneling microscopy, we detect an energy gap at the Fermi surface with magnitude consistent with d-wave symmetry and with linear density of states, vanishing only at four nodal points, even when superconductivity disappears at x = (1/8). Thus, the nonsuperconducting, striped state at x = (1/8) is consistent with a phase-incoherent d-wave superconductor whose Cooper pairs form spin-charge-ordered structures instead of becoming superconducting.