Chiral plaquette polaron theory of cuprate superconductivity

  title={Chiral plaquette polaron theory of cuprate superconductivity},
  author={Jamil Tahir-Kheli and William A. Goddard},
  journal={Physical Review B},
Ab initio density functional calculations on explicitly doped La2−xSrxCuO4 find that doping creates localized holes in out-of-plane orbitals. A model for cuprate superconductivity is developed based on the assumption that doping leads to the formation of holes on a four-site Cu plaquette composed of the out-of-plane A1 orbitals apical O pz, planar Cu d3z2−r2, and planar O psigma. This is in contrast to the assumption of hole doping into planar Cu dx^2−y^2 and O psigma orbitals as in the t-J… 

Origin of the Pseudogap in High-Temperature Cuprate Superconductors

Cuprate high-temperature superconductors exhibit a pseudogap in the normal state that decreases monotonically with increasing hole doping and closes at x ≈ 0.19 holes per planar CuO_2 while the

Universal Properties of Cuprate Superconductors: Tc Phase Diagram, Room-Temperature Thermopower, Neutron Spin Resonance, and STM Incommensurability Explained in Terms of Chiral Plaquette Pairing

We report that four properties of cuprates and their evolution with doping are consequences of simply counting four-site plaquettes arising from doping, (1) the universal Tc phase diagram

Direct role of structural dynamics in electron-lattice coupling of superconducting cuprates

Findings suggest a selective dynamical lattice involvement with the anisotropic electron–phonon coupling being on a time scale of the same order of magnitude as that of the spin exchange of electron pairing in the high-temperature superconducting phase.

Real-Time Observation of Cuprates Structural Dynamics by Ultrafast Electron Crystallography

The phonon-mediated attractive interaction between carriers leads to the Cooper pair formation in conventional superconductors. Despite decades of research, the glue holding Cooper pairs in

Surface and Electronic Properties of Hydrogen Terminated Si (001) Nanowires

The calculated band gaps reported previously for silicon nanowires (SiNW) have disagreed with the experimental values both in magnitude and in the behavior with radius. We resolve this discrepancy

Complex Symmetry, Jordan Blocks and Microscopic Self-organization

The basis and motivation for extending quantum mechanics beyond its traditional domain are recognized and examined. The mathematical details are briefly discussed and a convenient compact complex

Jamming and percolation of k2-mers on simple cubic lattices

A complete analysis of critical exponents and universality has been done, showing that the percolation phase transition involved in the system has the same universality class as the 3D random percolations, regardless of the size k considered.

Paramètre d'ordre magnétique dans la phase de pseudogap des oxydes de cuivre supraconducteurs à haute température critique

Ce travail de these presente un nouvel ordre magnetique dans l'enigmatique phase de pseudo-gap des cuprates supraconducteurs a haute temperature critique. L'etude des composes YBa2Cu3O6+δ,

Hidden magnetic excitation in the pseudogap phase of a high-Tc superconductor

Inelastic neutron scattering results for HgBa2CuO4+δ reveal a fundamental collective magnetic mode associated with the unusual order and are consistent with a particular type of order involving circulating orbital currents, and with the notion that the phase diagram is controlled by a quantum critical point.



Dopant structural distortions in high-temperature superconductors: anactive or a passive role?

Results are presented here on (Sr, Ba) and Ni dopants, which substitute at the La and Cu sites, respectively, of insulating La2CuO4, and the relevance of the measured local distortions for a complete understanding of the normal and superconducting properties of cuprates is discussed.

Skyrmion ground states in the presence of localizing potentials in weakly doped CuO2 planes.

  • Gooding
  • Physics
    Physical review letters
  • 1991
The competition between {ital t} and {ital J} that leads to the novel chiral-symmetry-breaking ground states is shown to be describable via a semiclassical theory that accounts for a coupling of the hole's spin current to the magnetization current of the antiferromagnetic background.

Ab initio evidence for the formation of impurity d 3 z 2 − r 2 holes in doped La 2 − x Sr x CuO 4

Using the spin unrestricted Becke-3-Lee-Yang-Parr density functional, we computed the electronic structure of explicitly doped La2-xSrxCuO4 (x=0.125, 0.25, and 0.5). At each doping level, an impurity

Antiferromagnetic band structure of La 2 CuO 4 : Becke- 3-Lee-Yang-Parr calculations

Using the Becke-3-LYP functional, we have performed band structure calculations on the high temperature superconductor parent compound, La2CuO4. Under the restricted spin formalism (rho(alpha) equal

The Resonating Valence Bond State in La2CuO4 and Superconductivity

The oxide superconductors, particularly those recently discovered that are based on La2CuO4, have a set of peculiarities that suggest a common, unique mechanism: they tend in every case to occur near

Spectroscopic evidence for a pseudogap in the normal state of underdoped high-Tc superconductors

IT is well known that BCS mean-field theory is remarkably successful in describing conventional superconductors. A central concept of BCS theory is the energy gap in the electronic excitation

Hall effect and resistivity in high-T c superconductors: The conserving approximation

The Hall coefficient (R_H) of high-Tc cuprates in the normal state shows the striking non-Fermi liquid behavior: R_H follows a Curie-Weiss type temperature dependence, and |R_H|>>1/|ne| at low

Destruction of the Fermi surface in underdoped high-Tc superconductors

The Fermi surface—the set of points in momentum space describing gapless electronic excitations—is a central concept in the theory of metals. In this context, the normal ‘metallic’ state of the

Analysis of NMR spin-lattice relaxation rates in cuprates

We investigate nuclear spin-lattice relaxation data in the normal state of optimally doped YBa2Cu3O7 by analyzing the contributions to the relaxation rate of the copper, planar oxygen and yttrium