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Signatures of the Nematic Ordering Transitions in the Thermal Conductivity of D-wave Superconductors
(American Physical Society, 2009)
We study experimental signatures of the Ising nematic quantum phase transition in d-wave superconductors, associated with the change of lattice symmetry from tetragonal to orthorhombic in the superconducting state. The ...
Valence Bond Solid Order Near Impurities in Two-Dimensional Quantum Antiferromagnets
(American Physical Society, 2008)
Recent scanning tunneling microscopy (STM) experiments on underdoped cuprates have displayed modulations in the local electronic density of states, which are centered on a Cu-O-Cu bond [Kohsaka et al. Science 315 1380 ...
Nernst Effect in the Electron-Doped Cuprates
(American Physical Society, 2009)
We calculate the normal-state Nernst signal in the cuprates resulting from a reconstruction of the Fermi surface due to spin-density wave order. An order parameter consistent with the reconstruction of the Fermi surface ...
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 ...
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 ...
Quantum-Critical Relativistic Magnetotransport in Graphene
(American Physical Society, 2008)
We study the thermal and electric transport of a fluid of interacting Dirac fermions using a Boltzmann approach. We include Coulomb interactions, a dilute density of charged impurities and the presence of a magnetic field ...
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 ...
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 ...
Universal Thermal and Electrical Transport Near the Superconductor-Metal Quantum Phase Transition in Nanowires
(American Physical Society, 2008)
We describe the thermal (\(\kappa\)) and electrical (\(\sigma\)) conductivities of quasi-one-dimensional wires, across a quantum phase transition from a superconductor to a metal induced by pair-breaking perturbations. ...
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 ...