376 citations · 1.1k across the 17 of their papers we have counts for
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Magnetotransport and de Haas-van Alphen measurements in the type-II Weyl semimetal TaIrTe
Seunghyun Khim, Klaus Koepernik, Dmitry V. Efremov +8
The layered ternary compound TaIrTe has been predicted to be a type-II Weyl semimetal with only four Weyl points just above the Fermi energy. Performing magnetotransport measur…
TaIrTe4 a ternary Type-II Weyl semi-metal
K. Koepernik, D. Kasinathan, D. V. Efremov +4
In metallic condensed matter systems two different types of Weyl fermions can in principle emerge, with either a vanishing (type-I) or with a finite (type-II) density of states at…
Orbital order and magnetism of FeNCN
Alexander A. Tsirlin, Klaus Koepernik, Helge Rosner
Based on density functional calculations, we report on the orbital order and microscopic magnetic model of FeNCN, a prototype compound for orbital-only models. Despite having a sim…
Anisotropy and Magnetism in the LSDA+U Method
Erik R. Ylvisaker, Warren E. Pickett, Klaus Koepernik
Consequences of anisotropy (variation of orbital occupation) and magnetism, and their coupling, are analyzed for LSDA+U functionals, both the commonly used ones as well as less com…
Quasi one-dimensional magnetism driven by unusual orbital ordering in CuSb2O6
Deepa Kasinathan, Klaus Koepernik, Helge Rosner
Essentially all undoped cuprates exhibit a quasi-planar, fourfold Cu-O coordination responsible for the magnetically active antibonding 3d-(x^2-y^2)-like state. Here, we present an…
Pressure-driven magnetic moment collapse in the ground state of MnO
Deepa Kasinathan, K. Koepernik, W. E. Pickett
The zero temperature Mott transition region in antiferromagnetic, spin S=5/2 MnO is probed using the correlated band theory LSDA+U method. The first transition encountered is an in…