Mapping the intrinsic photocurrent streamlines through micromagnetic heterostructure devices
arXiv:2002.07902 · doi:10.1073/pnas.2221815120
Abstract
Like air flowing over a wing, optimizing the flow of electronic charge is essential to the operation of nanoscale devices. Unfortunately, the delicate interplay of charge, spin, and heat in complex devices has precluded detailed imaging of charge flow. Here, we report on the visualization of intrinsic charge current streamlines through yttrium iron garnet micromagnetic heterostructures. Scanning photovoltage microscopy of precisely designed devices leads to striking spatial patterns, with prominent photovoltage features emerging in corners and narrow constrictions. These patterns, which evolve continuously with rotation of an external magnetic field, enable rich spatial mapping of fluid-like flow. Taking inspiration from aerodynamic Clark Y airfoils, we engineer micromagnetic wing shaped devices, called electrofoils, which allow us to precisely contort, compress and decompress flowlines of electronic charge.120 (39) e2221815120
arXiv comment7 Pages, 4 figures, supplemental materials attached after references
References in corpus (37)
- Electric Field Effect in Atomically Thin Carbon Films
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
- Negative local resistance caused by viscous electron backflow in graphene
- Probing condensed matter physics with magnetometry based on nitrogen-vacancy centres in diamond
- Superballistic flow of viscous electron fluid through graphene constrictions
- Imaging viscous flow of the Dirac fluid in graphene
- Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
- Thermoelectric generation based on spin Seebeck effects
- Measuring Hall Viscosity of Graphene's Electron Fluid
- Quantum imaging of current flow in graphene
- Visualizing Poiseuille flow of hydrodynamic electrons
- Local charge and spin currents in magnetothermal landscapes
- Spin-Hall Magnetoresistance in Platinum on Yttrium Iron Garnet: Dependence on platinum thickness and in-plane/out-of-plane magnetization
- Inverse Spin Hall Effect in nanometer-thick YIG/Pt system
- Photocurrent as a multi-physics diagnostic of quantum materials
- Robust edge photocurrent response on layered Type II Weyl semimetal WTe2
- Long range pure magnon spin diffusion observed in a non-local spin-Seebeck geometry
- Near-field photocurrent nanoscopy on bare and encapsulated graphene
- Nonreciprocal Directional Dichroism Induced by the Quantum Metric Dipole
- Frequency and power dependence of spin-current emission by spin pumping in a thin film YIG/Pt system
- Nanoscale imaging of equilibrium quantum Hall edge currents and of the magnetic monopole response in graphene
- Anomalous Hall effect in YIGPt bilayers
- Semi-classical wave packet dynamics in non-uniform electric fields
- Shockley-Ramo theorem and long-range photocurrent response in gapless materials
- 2D condensate of electrons and holes in ultrathin MoTe photocells
- Simultaneous imaging of voltage and current density of flowing electrons in two dimensions
- Hyperbolic enhancement of photocurrent patterns in minimally twisted bilayer graphene
- Intrinsic anomalous Hall conductivity in a nonuniform electric field
- Photo-Nernst current in graphene
- Imaging anisotropic vortex dynamics in FeSe
- Imaging Nematic Transitions in Iron-Pnictide Superconductors with a Quantum Gas
- Switchable quantized conductance in topological insulators revealed by the Shockley-Ramo theorem
- Systematic study of nonmagnetic resistance changes due to electrical pulsing in single metal layers and metal/antiferromagnet bilayers
- Local spin Seebeck imaging with scanning thermal probe
- Nanoscale magnetization and current imaging using scanning-probe magneto-thermal microscopy
- Giant intrinsic photoresponse in pristine graphene