42 citations · 118 across the 11 of their papers we have counts for
11 papers
Tuning crystal-fields by He-irradiation and orbital Widom line in SrVO films
Matthias Pickem, Karsten Held, Jan M. Tomczak
Helium-ion irradiation of epitaxial SrVO/SrTiO films causes a metal-insulator transition, so far attributed to a Mott localization driven by a reduced kinetic energy. Using…
LinReTraCe: The Linear Response Transport Centre
Matthias Pickem, Emanuele Maggio, Jan M. Tomczak
We describe the "Linear Response Transport Centre" (LinReTraCe), a package for the simulation of transport properties of solids. LinReTraCe captures quantum (in)coherence effects b…
Toward Functionalized Ultrathin Oxide Films: the Impact of Surface Apical Oxygen
Judith Gabel, Matthias Pickem, Philipp Scheiderer +12
Thin films of transition metal oxides open up a gateway to nanoscale electronic devices beyond silicon characterized by novel electronic functionalities. While such films are commo…
Zoology of spin and orbital fluctuations in ultrathin oxide films
Matthias Pickem, Josef Kaufmann, Karsten Held +1
Many metallic transition-metal oxides turn insulating when grown as films that are only a few unit-cells thick. The microscopic origins of these thickness induced metal-to-insulato…
Prototypical many-body signatures in transport properties of semiconductors
Matthias Pickem, Emanuele Maggio, Jan M. Tomczak
We devise a methodology for charge, heat, and entropy transport driven by carriers with finite lifetimes. Combining numerical simulations with analytical expressions for low temper…
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…
Self-consistent ladder DA approach
Josef Kaufmann, Christian Eckhardt, Matthias Pickem +3
We present and implement a self-consistent DA approach for multi-orbital models and ab initio materials calculations. It is applied to the one-band Hubbard model at various inte…
Resistivity saturation in Kondo insulators
Matthias Pickem, Emanuele Maggio, Jan M. Tomczak
Resistivities of heavy-fermion insulators typically saturate below a characteristic temperature . For some, metallic surface states, potentially from a non-trivial bulk topolo…
Particle-hole asymmetric lifetimes promoted by spin and orbital fluctuations in SrVO monolayers
Matthias Pickem, Jan M. Tomczak, Karsten Held
The two-dimensional nature of engineered transition-metal ultra-thin oxide films offers a large playground of yet to be fully understood physics. Here, we study pristine SrVO m…
Statistical error estimates in dynamical mean-field theory and extensions thereof
Patrick Kappl, Markus Wallerberger, Josef Kaufmann +2
We employ the jackknife algorithm to analyze the propagation of the statistical quantum Monte Carlo error through the Bethe--Salpeter equation. This allows us to estimate the error…
The AbinitioDA Project v1.0: Non-local correlations beyond and susceptibilities within dynamical mean-field theory
Anna Galler, Patrik Thunström, Josef Kaufmann +3
The ab initio extension of the dynamical vertex approximation (DA) method allows for realistic materials calculations that include non-local correlations beyond and dynamic…