Papers by Julia Steinberg
The Schwinger boson theory of the frustrated square lattice antiferromagnet yields a stable, gapp... more The Schwinger boson theory of the frustrated square lattice antiferromagnet yields a stable, gapped Z 2 spin liquid ground state with time-reversal symmetry, incommensurate spin correlations, and long-range Ising-nematic order. We obtain an equivalent description of this state using fermionic spinons (the fermionic spinons can be considered to be bound states of the bosonic spinons and the visons). Upon doping, the Z 2 spin liquid can lead to a fractionalized Fermi liquid (FL*) with small Fermi pockets of electronlike quasiparticles, while preserving the Z 2 topological and Ising-nematic orders. We describe a Higgs transition out of this deconfined metallic state into a confining superconducting state which is almost always of the Fulde-Ferrell-Larkin-Ovchinnikov type, with spatial modulation of the superconducting order.
We report on a Dirac-like Fermi surface in three-dimensional bulk materials in a distorted spinel... more We report on a Dirac-like Fermi surface in three-dimensional bulk materials in a distorted spinel structure on the basis of density functional theory as well as tight-binding theory. The four examples we provide in this Letter are BiZnSiO 4 , BiCaSiO 4 , BiAlInO 4 , and BiMgSiO 4 . A necessary characteristic of these structures is that they contain a Bi lattice which forms a hierarchy of chainlike substructures, with consequences for both fundamental understanding and materials design.
We report on a Dirac-like Fermi surface in three-dimensional bulk materials in a distorted spinel... more We report on a Dirac-like Fermi surface in three-dimensional bulk materials in a distorted spinel structure on the basis of density functional theory (DFT) as well as tight-binding theory. The four examples we provide in this paper are BiZnSiO4, BiCaSiO4, BiMgSiO4, and BiAlInO4. A necessary characteristic of these structures is that they contain a Bi lattice which forms a hierarchy of chain-like substructures, with consequences for both fundamental understanding and materials design.
Drafts by Julia Steinberg
Recently, it has been proposed that the butterfly velocity – a speed at which quantum information... more Recently, it has been proposed that the butterfly velocity – a speed at which quantum information propagates – may provide a fundamental bound on diffusion constants in dirty incoherent metals. We analytically compute the charge diffusion constant and the butterfly velocity in charge-neutral holographic matter with long wavelength " hydrodynamic " disorder in a single spatial direction. In this limit, we find that the butterfly velocity does not set a sharp lower bound for the charge diffusion constant.
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Papers by Julia Steinberg
Drafts by Julia Steinberg