61 citations · 320 across the 18 of their papers we have counts for
9 papers · 1 filter
Beyond the conventional Emery model: crucial role of long-range hopping for cuprate superconductivity
Eric Jacob, M. O. Malcolms, Viktor Christiansson +6
The Emery model is the quintessential model for cuprate superconductors. In his eponymous paper, Emery only considered the next-nearest-neighbor oxygen-copper hopping. Later, also…
Fermi and Luttinger arcs: two concepts, realized on one surface
Paul Worm, Matthias Reitner, Karsten Held +1
We present an analytically solvable model for correlated electrons, which is able to capture the major Fermi surface modifications occurring in both hole- and electron-doped cuprat…
Chiral magnetism and ordering of oxygen vacancies in SrTiO
Liang Si, Xiaochao Wang, Paul Worm +4
Oxygen vacancies in the perovskite insulator SrTiO free electrons that couple with other physical degrees of freedom such as lattice, orbital, and spin. This leads to the emerg…
Strain-Tuned Magnetic Frustration in a Square Lattice - Material
I. Biało, L. Martinelli, G. De Luca +16
Magnetic frustration is a route that can lead to the emergence of novel ground states, including spin liquids and spin ices. Such frustration can be introduced through either the g…
Merging numerical renormalization group and intermediate representation to compactify two- and three-point correlators
Sebastian Huber, Markus Wallerberger, Paul Worm +1
The vanguard of many-body theory is nowadays dealing with the full frequency dynamics of n-point Green's functions for n higher than two. Numerically, these objects easily become a…
Explaining the pseudogap through damping and antidamping on the Fermi surface by imaginary spin scattering
Friedrich Krien, Paul Worm, Patrick Chalupa +2
The mechanism of the pseudogap observed in hole-doped cuprates remains one of the central puzzles in condensed matter physics. We analyze this phenomenon via a Feynman-diagrammatic…
Broadening and sharpening of the Drude peak through antiferromagnetic fluctuations
Paul Worm, Clemens Watzenböck, Matthias Pickem +2
Antiferromagnetic or charge density wave fluctuations couple with light through the recently discovered π-ton contribution to the optical conductivity, and quite generically consti…
Enhancement of impact ionization in Hubbard clusters by disorder and next-nearest-neighbor hopping
Anna Kauch, Paul Worm, Paul Prauhart +3
We perform time-resolved exact diagonalization of the Hubbard model with time dependent hoppings on small clusters of up to sites. Here, the time dependence originates from a…
Electron-light interaction in nonequilibrium -- exact diagonalization for time dependent Hubbard Hamiltonians
Michael Innerberger, Paul Worm, Paul Prauhart +1
We present a straightforward implementation scheme for solving the time dependent Schrödinger equation for systems described by the Hubbard Hamiltonian with time dependent hoppings…