65 citations · 287 across the 17 of their papers we have counts for
17 papers
Tracking real-space quantum state breathing through Floquet-projector geometry
Arpit Raj, Johannes Mitscherling, Björn Trauzettel
Periodic driving of spatially periodic quantum systems generates band structures that are absent in static crystals. We present a quantum geometric theory to characterize the Floqu…
Microscopic origin of -wave magnetism
Johannes Mitscherling, Jan Priessnitz, Clara K. Geschner +1
-, -, or -wave antialtermagnets yield large non-relativistic spin splitting with out-of-plane spin polarization in momentum space perpendicular to the coplanar non-colline…
Orbital magnetization from parallel transport of Bloch states
Johannes Mitscherling, Jan Priessnitz, Libor Šmejkal
Quantum geometric formulations of linear and nonlinear responses can be constructed from a single building block in the form of a gauge-invariant interband transition operator. Her…
Quantum Geometric Origin of the Intrinsic Nonlinear Hall Effect
Yannis Ulrich, Johannes Mitscherling, Laura Classen +1
We decompose the intrinsic second-order nonlinear Hall effect (NLHE) of a generic multiband system into its quantum-geometric contributions within a fully quantum-mechanical, proje…
Orbital Wigner functions and quantum transport in multiband systems
Johannes Mitscherling, Dan S. Borgnia, SuryaNeil Ahuja +2
Traditional theories of electron transport in crystals are based on the Boltzmann equation and do not capture physics arising from quantum coherence. We introduce a transport forma…
Gauge-invariant projector calculus for quantum state geometry and applications to observables in crystals
Johannes Mitscherling, Alexander Avdoshkin, Joel E. Moore
The importance of simple geometrical invariants, such as the Berry curvature and quantum metric, constructed from the Bloch states of a crystal has become well-established over fou…
The multi-state geometry of shift current and polarization
Alexander Avdoshkin, Johannes Mitscherling, Joel E. Moore
The quantum metric and Berry curvature capture essential properties of non-trivial Bloch states and underpin many fascinating phenomena. However, it becomes increasingly evident th…
Drude weight of an interacting flat-band metal
Ohad Antebi, Johannes Mitscherling, Tobias Holder
Flatband systems form a new class of materials that challenge the conventional wisdom of transport. The intrinsically strong electronic correlations combined with the vanishing kin…
Symmetry-enforced double Weyl points, multiband quantum geometry, and singular flat bands of doping-induced states at the Fermi level
Moritz M. Hirschmann, Johannes Mitscherling
Two common difficulties in the design of topological quantum materials are that the desired features lie too far from the Fermi level and are spread over a too-large energy range.…
Nontrivial quantum geometry of degenerate flat bands
Bruno Mera, Johannes Mitscherling
The importance of the quantum metric in flat-band systems has been noticed recently in many contexts such as the superfluid stiffness, the dc electrical conductivity, and ideal Che…
Bound on resistivity in flat-band materials due to the quantum metric
Johannes Mitscherling, Tobias Holder
The quantum metric is a central quantity of band theory but has so far not been related to many response coefficients due to its nonclassical origin. However, within a newly develo…
Non-Hermitian band topology from momentum-dependent relaxation in two-dimensional metals with spiral magnetism
Johannes Mitscherling, Walter Metzner
We study the emergence of non-Hermitian band topology in a two-dimensional metal with planar spiral magnetism due to a momentum-dependent relaxation rate. A sufficiently strong mom…
Electrical Conductivity in Quantum Materials
Johannes Mitscherling
In recent years, there is an increasing interest in transport phenomena that are fundamentally linked to the presence of multiple bands. In this thesis, we develop, discuss, and ap…
Longitudinal and anomalous Hall conductivity of a general two-band model
Johannes Mitscherling
We derive and analyze the longitudinal and the anomalous Hall conductivity for a general momentum-block-diagonal two-band model. This model captures a broad spectrum of physically…
Charge carrier drop at the onset of pseudogap behavior in the two-dimensional Hubbard model
Pietro M. Bonetti, Johannes Mitscherling, Demetrio Vilardi +1
We show that antiferromagnetic spin-density wave order in the two-dimensional Hubbard model yields a drop of the charge carrier density as observed in recent transport measurements…
Longitudinal conductivity and Hall coefficient in two-dimensional metals with spiral magnetic order
Johannes Mitscherling, Walter Metzner
We compute the longitudinal dc conductivity and the Hall conductivity in a two-dimensional metal with spiral magnetic order. Scattering processes are modeled by a momentum-independ…
Non-linear conductance in mesoscopic weakly disordered wires -- Interaction and magnetic field asymmetry
Christophe Texier, Johannes Mitscherling
We study the non-linear conductance in coherent quasi-1D weakly disordered metallic wires. The analysis is based on the calculation…