1.3k citations · 2.7k across the 24 of their papers we have counts for
24 papers
Pair density wave order from electron repulsion
Yi-Ming Wu, P. A. Nosov, Aavishkar A. Patel +1
A pair density wave (PDW) is a superconductor whose order parameter is a periodic function of space, without an accompanying spatially-uniform component. Since PDWs are not the out…
Large theory of critical Fermi surfaces II: conductivity
Haoyu Guo, Aavishkar A. Patel, Ilya Esterlis +1
A Fermi surface coupled to a scalar field can be described in a expansion by choosing the fermion-scalar Yukawa coupling to be random in the -dimensional flavor space, but…
Universal theory of strange metals from spatially random interactions
Aavishkar A. Patel, Haoyu Guo, Ilya Esterlis +1
We consider two-dimensional metals of fermions coupled to quantum critical scalars, the latter representing order parameters or emergent gauge fields. We show that at low temperatu…
Maximal quantum chaos of the critical Fermi surface
Maria Tikhanovskaya, Subir Sachdev, Aavishkar A. Patel
We investigate the many-body quantum chaos of non-Fermi liquid states with Fermi surfaces in two spatial dimensions by computing their out-of-time-order correlation functions. Usin…
Many-body energy invariant for -linear resistivity
Aavishkar A. Patel, Hitesh J. Changlani
The description of dynamics of strongly correlated quantum matter is a challenge, particularly in physical situations where a quasiparticle description is absent. In such situation…
Strange Metals from Melting Correlated Insulators in Twisted Bilayer Graphene
Peter Cha, Aavishkar A. Patel, Eun-Ah Kim
Even as the understanding of the mechanism behind correlated insulating states in magic-angle twisted bilayer graphene converges towards various kinds of spontaneous symmetry break…
Solvable Theory of a Strange Metal at the Breakdown of a Heavy Fermi Liquid
Erik E. Aldape, Tessa Cookmeyer, Aavishkar A. Patel +1
We introduce an effective theory for quantum critical points (QCPs) in heavy fermion systems, involving a change in carrier density without symmetry breaking. Our new theory captur…
Magnetotransport in a model of a disordered strange metal
Aavishkar A. Patel, John McGreevy, Daniel P. Arovas +1
Despite much theoretical effort, there is no complete theory of the 'strange' metal state of the high temperature superconductors, and its linear-in-temperature, , resistivity.…
Quantum butterfly effect in weakly interacting diffusive metals
Aavishkar A. Patel, Debanjan Chowdhury, Subir Sachdev +1
We study scrambling, an avatar of chaos, in a weakly interacting metal in the presence of random potential disorder. It is well known that charge and heat spread via diffusion in s…
Quantum chaos on a critical Fermi surface
Aavishkar A. Patel, Subir Sachdev
We compute parameters characterizing many-body quantum chaos for a critical Fermi surface without quasiparticle excitations. We examine a theory of species of fermions at non-z…
Two dimensional spin liquids with topological order in an array of quantum wires
Aavishkar A. Patel, Debanjan Chowdhury
Insulating spin liquids are a phase of matter with bulk anyonic quasiparticle excitations and ground state degeneracies on manifolds with non-trivial topology. In th…
Shear viscosity at the Ising-nematic quantum critical point in two dimensional metals
Andreas Eberlein, Aavishkar A. Patel, Subir Sachdev
In an isotropic strongly interacting quantum liquid without quasiparticles, general scaling arguments imply that the dimensionless ratio , where is the shea…
Light induced enhancement of superconductivity via melting of competing bond-density wave order in underdoped cuprates
Aavishkar A. Patel, Andreas Eberlein
We develop a theory for light-induced superconductivity in underdoped cuprates in which the competing bond-density wave order is suppressed by driving phonons with light. Close to…
Confinement transition to density wave order in metallic doped spin liquids
Aavishkar A. Patel, Debanjan Chowdhury, Andrea Allais +1
Insulating quantum spin liquids can undergo a confinement transition to a valence bond solid state via the condensation of topological excitations of the associated gauge theory. W…
Hyperscaling at the spin density wave quantum critical point in two dimensional metals
Aavishkar A. Patel, Philipp Strack, Subir Sachdev
The hyperscaling property implies that spatially isotropic critical quantum states in spatial dimensions have a specific heat which scales with temperature as , and an…
DC resistivity at the onset of spin density wave order in two-dimensional metals
Aavishkar A. Patel, Subir Sachdev
The theory for the onset of spin density wave order in a metal in two dimensions flows to strong coupling, with strong interactions not only at the `hot spots', but on the entire F…
Dirac edges of fractal magnetic minibands in graphene with hexagonal moire superlattices
Xi Chen, J. R. Wallbank, A. A. Patel +3
We find a systematic reappearance of massive Dirac features at the edges of consecutive minibands formed at magnetic fields B_{p/q}= pϕ_0/(qS) providing rational magnetic flux thro…
Quench Dynamics of Edge States in 2-D Topological Insulator Ribbons
Aavishkar A. Patel, Shraddha Sharma, Amit Dutta
We study the dynamics of edge states of the two dimensional BHZ Hamiltonian in a ribbon geometry following a sudden quench to the quantum critical point separating the topological…
Floquet generation of Majorana end modes and topological invariants
Manisha Thakurathi, Aavishkar A. Patel, Diptiman Sen +1
We show how Majorana end modes can be generated in a one-dimensional system by varying some of the parameters in the Hamiltonian periodically in time. The specific model we conside…
Role of marginality in quantum fidelity and Loschmidt echo: Dirac points in 2-D
Aavishkar A. Patel, Shraddha Sharma, Amit Dutta
We investigate the effect of marginality on the ground state fidelity and Loschmidt echo. For this purpose, we study the above quantities near the quantum critical point (QCP) of t…
Cloning of Dirac fermions in graphene superlattices
L. A. Ponomarenko, R. V. Gorbachev, G. L. Yu +15
Lateral superlattices have attracted major interest as this may allow one to modify spectra of two dimensional electron systems and, ultimately, create materials with tailored elec…
Classical and quantum magneto-oscillations of current flow near a p-n junction in graphene
Aavishkar A. Patel, Nathan Davies, Vadim Cheianov +1
The proposed semiclassical theory predicts two types of oscillations in the flow of current injected from a point source near a ballistic p-n junction in graphene in a strong magne…
Skipping and snake orbits of electrons: singularities and catastrophes
Nathan Davies, Aavishkar A. Patel, Alberto Cortijo +3
Near the sample edge, or a sharp magnetic field step the drift of two-dimensional electrons in a magnetic field has the form of skipping/snake orbits. We show that families of skip…
Theromelectricity in Graphene: Effects of a gap and magnetic fields
Aavishkar A. Patel, Subroto Mukerjee
We calculate the thermopower of monolayer graphene in various circumstances. First we show that experiments on the thermopower of graphene can be understood quantitatively with a v…