347 citations · 2.5k across the 33 of their papers we have counts for
20 papers · 1 filter
Quantum metric-induced nonlinear transport in a topological antiferromagnet
Naizhou Wang, Daniel Kaplan, Zhaowei Zhang +13
The Berry curvature and quantum metric are the imaginary part and real part, respectively, of the quantum geometric tensor which characterizes the topology of quantum states. The f…
The quantum geometric origin of capacitance in insulators
Ilia Komissarov, Tobias Holder, Raquel Queiroz
In band insulators, where the Fermi surface is absent, adiabatic transport is allowed only due to the geometry of the Hilbert space. By driving the system at a small but finite fre…
Unification of Nonlinear Anomalous Hall Effect and Nonreciprocal Magnetoresistance in Metals by the Quantum Geometry
Daniel Kaplan, Tobias Holder, Binghai Yan
The quantum geometry has significant consequences in determining transport and optical properties in quantum materials. Here, we use a semiclassical formalism coupled with perturba…
General nonlinear Hall current in magnetic insulators beyond the quantum anomalous Hall effect
Daniel Kaplan, Tobias Holder, Binghai Yan
Can a generic magnetic insulator exhibit a Hall current? The quantum anomalous Hall effect (QAHE) is one example of an insulating bulk carrying a quantized Hall conductivity and ot…
Unifying semiclassics and quantum perturbation theory at nonlinear order
Daniel Kaplan, Tobias Holder, Binghai Yan
Nonlinear electrical response permits a unique window into effects of band structure geometry. It can be calculated either starting from a Boltzmann approach for small frequencies,…
Para-hydrodynamics from weak surface scattering in ultraclean thin flakes
Yotam Wolf, Amit Aharon-Steinberg, Binghai Yan +1
Electron hydrodynamics typically emerges in electron fluids with a high electron-electron collision rate. However, new experiments with thin flakes of WTe have revealed that ot…
Direct observation of vortices in an electron fluid
Amit Aharon-Steinberg, Tobias Völkl, Arkady Kaplan +12
Vortices are the hallmarks of hydrodynamic flow. Recent studies indicate that strongly-interacting electrons in ultrapure conductors can display signatures of hydrodynamic behavior…
Mixed axial-gravitational anomaly from emergent curved spacetime in nonlinear charge transport
Tobias Holder, Daniel Kaplan, Roni Ilan +1
In 3+1 dimensional spacetime, two vector gauge anomalies are known: The chiral anomaly and the mixed axial-gravitational anomaly. While the former is well documented and tied to th…
Electrons flow like falling cats: Deformations and emergent gravity in quantum transport
Tobias Holder
The effective low-energy excitations in a metallic or semimetallic crystalline system (i.e. electronic quasiparticles) always have a finite spatial extent. It is self-evident but v…
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…
Half and quarter metals in rhombohedral trilayer graphene
Haoxin Zhou, Tian Xie, Areg Ghazaryan +8
Ferromagnetism is most common in transition metal compounds but may also arise in low-density two-dimensional electron systems, with signatures observed in silicon, III-V semicondu…
Twisted photovoltaics at terahertz frequencies from momentum shift current
Daniel Kaplan, Tobias Holder, Binghai Yan
The bulk photovoltaic effect (BPVE) converts light into a coherent dc current at zero bias, through what is commonly known as the shift current. This current has previously been at…
Long-range nontopological edge currents in charge-neutral graphene
Amit Aharon-Steinberg, Arthur Marguerite, David J. Perello +6
Van der Waals heterostructures display a rich variety of unique electronic properties. To identify novel transport mechanisms, nonlocal measurements have been widely used, wherein…
Chirality induced Giant Unidirectional Magnetoresistance in Twisted Bilayer Graphene
Yizhou Liu, Tobias Holder, Binghai Yan
Twisted bilayer graphene (TBG) exhibits fascinating correlation-driven phenomena like the superconductivity and Mott insulating state, with flat bands and a chiral lattice structur…
Nonvanishing sub-gap photocurrent as a probe of lifetime effects
Daniel Kaplan, Tobias Holder, Binghai Yan
For semiconductors and insulators, it is commonly believed that in-gap transitions into non-localized states are smoothly suppressed in the clean limit, i.e. at zero temperature th…
Consequences of Time-reversal-symmetry Breaking in the Light-Matter Interaction: Berry Curvature, Quantum Metric and Diabatic Motion
Tobias Holder, Daniel Kaplan, Binghai Yan
Nonlinear optical response is well studied in the context of semiconductors and has gained a renaissance in studies of topological materials in the recent decade. So far it mainly…
Visualizing Poiseuille flow of hydrodynamic electrons
Joseph A. Sulpizio, Lior Ella, Asaf Rozen +12
Hydrodynamics is a general description for the flow of a fluid, and is expected to hold even for fundamental particles such as electrons when inter-particle interactions dominate.…
Unified description of the classical Hall viscosity
Tobias Holder, Raquel Queiroz, Ady Stern
In absence of time-reversal symmetry, viscous electron flow hosts a number of interesting phenomena, of which we focus here on the Hall viscosity. Taking a step beyond the hydrodyn…
Magnetically Switchable Light-Matter Interaction in the Two-Dimensional Magnet CrI3
Yang Zhang, Tobias Holder, Hiroaki Ishizuka +4
Coupling different physical properties is a fascinating subject of physics. Already well-known are the multiferroics which show properties of ferroelectrics and magnets. But ferroe…
Ballistic and hydrodynamic magnetotransport in narrow channels
Tobias Holder, Raquel Queiroz, Thomas Scaffidi +6
An increasing number of low carrier density materials exhibit a surprisingly large transport mean free path due to inefficient momentum relaxation. Consequently, charge transport i…