Surface pinning of fluctuating charge order: an "extraordinary" surface phase transition

Abstract

We study the mean-field theory of charge-density wave (CDW) order in a layered system, including the effect of the long-range Coulomb interaction and of screening by uncondensed electrons. We particularly focus on the conditions necessary for an ``extraordinary'' transition, in which the surface orders at a higher temperature, and is more likely to be commensurate, than the bulk. We interpret recent experiments on NaCCOC as indicating the presence of commensurate CDW at the surface that is not present in the bulk. More generally, we show that poor screening of the Coulomb interaction tends to stabilize incommensurate order, possibly explaining why the CDW order in LSCO and NbSe2 remains incommensurate to T -> 0, despite the small magnitude of the incommensurability.

9 pages, no figures, 31 references; 1 new figure and minor editing of the text

References in corpus (14)

• How to detect fluctuating order in the high-temperature superconductors
• A Four-Unit-Cell Periodic Pattern of Quasiparticle States Surrounding Vortex Cores in Bi2Sr2CaCu2O8+d
• A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
• Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor
• Local Ordering in the Pseudogap State of the High-T${}_c$ Superconductor Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$
• Stripe phases in high-temperature superconductors
• Electronic Phase Diagram of High-T_c Cuprate Superconductors from a Mapping of the In-Plane Resistivity Curvature
• Periodic Density of States Modulations in Superconducting $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$
• Quantum Theory of the Smectic Metal State in Stripe Phases
• Local Magnetic Order vs. Superconductivity in a Layered Cuprate
• Two dimensional anisotropic non Fermi-liquid phase of coupled Luttinger liquids
• Incommensurate Geometry of the Elastic Magnetic Peaks in Superconducting La1.88Sr0.12CuO4
• Quantum phase transitions in cuprates: stripes and antiferromagnetic supersolids
• Charge dynamics of Ca_{2-x}Na_{x}CuO_{2}Cl_{2} as a correlated electron system with the ideal tetragonal lattice

Cited by in corpus (18)

• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Distinguishing Patterns of Charge Order: Stripes or Checkerboards
• STM Studies of TbTe3: Evidence for a fully Incommensurate Charge Density Wave
• Generic character of charge and spin density waves in superconducting cuprates
• Locally commensurate charge-density wave with three-unit-cell periodicity in YBCO
• Quantum melting of the hole crystal in the spin ladder of Sr14-xCaxCu24O41
• Surface Charge Density Wave Transition in NbSe${}_3$
• Discovery of unconventional charge density wave at the surface of K0.9Mo6O17
• Imaging anomalous nematic order and strain in optimally doped BaFe${}_2$(As,P)${}_2$
• Extinction of quasiparticle interference in underdoped cuprates with coexisting order
• Imaging Nematic Transitions in Iron-Pnictide Superconductors with a Quantum Gas
• Absence of long-ranged charge order in $\mathrm{N}{\mathrm{a}}_{\mathrm{x}}\mathrm{C}{\mathrm{a}}_{2-\mathrm{x}}\mathrm{Cu}{\mathrm{O}}_2\mathrm{C}{\mathrm{l}}_2$ at x=0.08
• Charge Density Waves and the Hidden Nesting of Purple Bronze K${}_{0.9}$Mo${}_6$O${}_{17}$
• Absence of a bulk charge density wave signature in x-ray measurements of UTe${}_2$
• Bulk charge density wave and electron-phonon coupling in superconducting copper oxychlorides
• Electron-phonon coupling in a two-dimensional inhomogeneous electron gas: consequences for surface spectral properties
• Magnetic excitations and absence of charge order in the van der Waals ferromagnet Fe${}_{4.75}$GeTe${}_2$
• Angular Dependent Spectral-Weight Transfer and Evidence for Symmetry Broken In-Plane Charge Response in Ca${}_{1.9}$Na${}_{0.1}$CuO${}_2$Cl${}_2$