Browsing by Keyword "strongly correlated electrons"
Now showing items 1-20 of 48
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Algebraic Charge Liquids
(Nature Publishing Group, 2008)High temperature superconductivity emerges in the cuprate compounds upon changing the electron density of an insulator in which the electron spins are antiferromagnetically ordered. A key characteristic of the superconductor ... -
Collective Cyclotron Motion of the Relativistic Plasma in Graphene
(American Physical Society, 2008)We present a theory of the finite temperature thermoelectric response functions of graphene in the hydrodynamic regime where electron-electron collisions dominate the scattering. In moderate magnetic fields, the Dirac ... -
Competition Between Spin Density Wave Order and Superconductivity in the Underdoped Cuprates
(American Physical Society, 2009)We describe the interplay between \(d\)-wave superconductivity and spin density wave (SDW) order in a theory of the hole-doped cuprates at hole densities below optimal doping. The theory assumes local SDW order, and ... -
Competition between Superconductivity and Nematic Order: Anisotropy of Superconducting Coherence Length
(American Physical Society, 2012)We study the interplay between nematic order and superconductivity, motivated by a recent experiment on FeSe observing strongly distorted vortex shapes [Song et al. Science 332 1410 (2011)]. We show that the nematic order ... -
Destruction of Neel Order in the Cuprates by Electron-Doping
(American Physical Society, 2008)Motivated by the evidence\(^{1, 2, 3, 4, 5, 6}\) in Pr\(_{2-x}\)Ce\(_x\)CuO\(_{4-y}\) and Nd\(_{2-x}\)Ce\(_x\)CuO\(_{4-y}\) of a magnetic quantum critical point at which Neel order is destroyed, we study the evolution with ... -
Dynamics and Transport of the \(Z_2\) Spin Liquid: Application to \(\kappa-(ET)_2Cu_2(CN)_3\)
(American Physical Society, 2009)We describe neutron scattering, NMR relaxation, and thermal transport properties of \(Z_2\) spin liquids in two dimensions. Comparison to recent experiments on the spin \(S=\frac{1}{2}\) triangular lattice antiferromagnet ... -
Edge and Impurity Response in Two-Dimensional Quantum Antiferromagnets
(American Physical Society, 2008)Motivated by recent Monte Carlo simulations of Höglund and Sandvik (arXiv:0808.0408), we study edge response in square lattice quantum antiferromagnets. We use the \(O(3)\) nonlinear σ model to compute the decay asymptotics ... -
Fermi Surface Reconstruction in Hole-Doped t-J Models without Long-Range Antiferromagnetic Order
(American Physical Society, 2012)We calculate the Fermi surface of electrons in hole-doped, extended t-J models on a square lattice in a regime where no long-range antiferromagnetic order is present, and no symmetries are broken. Using the “spinon-dopon” ... -
Fluctuating Spin Density Waves in Metals
(American Physical Society, 2009)Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary band structure and ordering wavevector. ... -
Geometric Phases and Competing Orders in Two Dimensions
(American Physical Society, 2011)We discuss the problem of characterizing "quantum disordered" ground states, obtained upon loss of antiferromagnetic order on general lattices in two spatial dimensions, with arbitrary electronic band structure. A key ... -
Global Phase Diagrams of Frustrated Quantum Antiferromagnets in Two Dimensions: Doubled Chern-Simons Theory
(The American Physical Society, 2009)We present a general approach to understanding the quantum phases and phase transitions of quantum antiferromagnets in two spatial dimensions. We begin with the simplest spin liquid state, the \(Z_2\) spin liquid, whose ... -
Hidden Fermi Surfaces in Compressible States of Gauge-Gravity Duality
(American Physical Society, 2012)General scaling arguments, and the behavior of the thermal entropy density, are shown to lead to an infrared metric holographically representing a compressible state with hidden Fermi surfaces. This metric is characterized ... -
Holographic Metals and the Fractionalized Fermi Liquid
(American Physical Society, 2010)We show that there is a close correspondence between the physical properties of holographic metals near charged black holes in anti-de Sitter (AdS) space, and the fractionalized Fermi liquid phase of the lattice Anderson ... -
Imaging Bond Order Near Nonmagnetic Impurities in Square-Lattice Antiferromagnets
(American Physical Society, 2008)We study the textures of generalized “charge densities” (scalar objects invariant under time reversal), in the vicinity of nonmagnetic impurities in square-lattice quantum antiferromagnets, by order parameter field theories. ... -
Instabilities Near the Onset of Spin Density Wave Order in Metals
(Institute of Physics, 2010)We discuss the low energy theory of two-dimensional metals near the onset of spin density wave order. It is well known that such a metal has a superconducting instability induced by the formation of spin-singlet pairs of ... -
Insulator-Metal Transition on the Triangular Lattice
(American Physical Society, 2008)Mott insulators with a half-filled band of electrons on the triangular lattice have been recently studied in a variety of organic compounds. All of these compounds undergo transitions to metallic and/or superconducting ... -
Majorana Liquids: The Complete Fractionalization of the Electron
(American Physical Society, 2010)We describe ground states of correlated electron systems in which the electron fractionalizes into separate quasiparticles which carry its spin and its charge, and into real Majorana fermions which carry its Fermi statistics. ... -
Mapping of Coulomb Gases and Sine-Gordon Models to Statistics of Random Surfaces
(American Physical Society, 2008)We introduce a new class of sine-Gordon models, for which interaction term is present in a region different from the domain over which quadratic part is defined. We develop a novel non-perturbative approach for calculating ... -
Modulation Spectroscopy and Dynamics of Double Occupancies in a Fermionic Mott Insulator
(American Physical Society, 2009)We calculate the rate of creation of double occupancies in a 3D Fermionic Mott insulator near half-filling by modulation of optical lattice potential. At high temperatures, incoherent holes lead to a broad response peaked ... -
Nanoscale Surface Element Identification and Dopant Homogeneity in the High-\(T_c\) Superconductor \(Pr_xC_{1-x}Fe_2As_2\)
(American Physical Society, 2013)We use scanning tunneling microscopy to determine the surface structure and dopant distribution in \(Pr_xCa_{1-x}Fe_2As_2\), the highest-\(T_c\) member of the 122 family of iron-based superconductors. We identify the cleaved ...