Quantitative relationship between polarization differences and the zone-averaged shift photocurrent

  title={Quantitative relationship between polarization differences and the zone-averaged shift photocurrent},
  author={Benjamin M. Fregoso and Takahiro Morimoto and Joel E Moore},
  journal={Physical Review B},
A relationship is derived between differences in electric polarization between bands and the ``shift vector'' that controls part of a material's bulk photocurrent, then demonstrated in several models. Electric polarization has a quantized gauge ambiguity and is normally observed at surfaces via the surface charge density, while shift current is a bulk property and is described by shift vector gauge invariant at each point in momentum space. They are connected because the same optical… 

Figures from this paper

Shift current photovoltaic effect in a ferroelectric charge-transfer complex
The photovoltaic effect in an organic molecular crystal tetrathiafulvalene-p-chloranil with a large ferroelectric polarization mostly induced by the intermolecular charge transfer is reported with a fairly large zero-bias photocurrent with visible-light irradiation and switching of the current direction by the reversal of the polarization.
Bulk photovoltaic effects in the presence of a static electric field
Irradiated crystalline insulators in the presence of a static electric field exhibit three new types of nonlinear photocurrents. They represent physical singularities of the third order free electron
Effect of wavefunction delocalization on shift current generation.
  • L. Tan, A. Rappe
  • Physics
    Journal of physics. Condensed matter : an Institute of Physics journal
  • 2019
Upper bounds on the magnitude of shift photocurrent generation of materials in two limiting cases are derived, finding that ratio of electron hopping amplitudes to the band gap plays a vital role in maximizing the amount of nonlinear response.
Shift-current bulk photovoltaic effect influenced by quasiparticle and exciton
We compute the shift-current bulk photovoltaic effect (BPVE) in bulk ${\mathrm{BaTiO}}_{3}$ and two-dimensional monochalcogenide SnSe considering quasiparticle corrections and exciton effects. We
Ballistic Current From First Principles Calculations
The bulk photovoltaic effect (BPVE) refers to current generation due to illumination by light in a homogeneous bulk material lacking inversion symmetry. Apart from the intensively studied shift
Shift-current response as a probe of quantum geometry and electron-electron interactions in twisted bilayer graphene
Moiré materials, and in particular twisted bilayer graphene (TBG), exhibit a range of fascinating phenomena, that emerge from the interplay of band topology and interactions. We show that the
Impact of electrodes on the extraction of shift current from a ferroelectric semiconductor SbSI
Noncentrosymmetric bulk crystals generate photocurrent without any bias voltage. One of the dominant mechanisms, shift current, comes from the quantum interference of electron wave functions being
Directional shift current in mirror-symmetric BC2N
We present a theoretical study of the shift current in a noncentrosymmetric polytype of graphitic BC$_2$N. We find that the photoconductivity near the fundamental gap is strongly anisotropic due to
Large Bulk Piezophotovoltaic Effect of Monolayer Transition Metal Dichalcogenides
The bulk photovoltaic effect in noncentrosymmetric materials is an intriguing physical phenomenon that holds potential for high-efficiency energy harvesting. Here, we study the shift current bulk
Phonon Influence on Bulk Photovoltaic Effect in the Ferroelectric Semiconductor GeTe.
The investigation of the shift current response in the ferroelectric semiconductor GeTe, which is found possess a large SHC response due to its intrinsic narrow band gap and high covalency, provides an explicit experimental prediction about the temperature dependence of BPVE and can be extended to other classes of noncentrosymmetric materials.