Related Experiment Video
Updated: Feb 2, 2026
07:42
Inkjet Printing All Inorganic Halide Perovskite Inks for Photovoltaic Applications
Published on: January 22, 2019
11.8K
Jerk Current: A Novel Bulk Photovoltaic Effect.
Benjamin M Fregoso1, Rodrigo A Muniz2,3, J E Sipe3
1Department of Physics, Kent State University, Kent, Ohio 44240, USA.
Physical Review Letters
|November 10, 2018
Summary
We discovered a novel photoinduced current, the "jerk current," in biased crystalline insulators. This current grows quadratically with time and exhibits unique perpendicular components, offering new insights into carrier dynamics.
Area of Science:
- Solid State Physics
- Condensed Matter Physics
- Optoelectronics
Background:
- Photoinduced currents are crucial in understanding charge transport in materials.
- Standard hydrodynamic models often simplify carrier behavior under electric fields.
Purpose of the Study:
- To investigate a third-order polarization susceptibility divergence in biased crystalline insulators.
- To identify and characterize a novel photoinduced current, termed the
Main Methods:
- Theoretical analysis of third-order polarization susceptibility.
- Modeling photoinduced current dynamics in crystalline insulators.
Main Results:
- Identified a photoinduced current, the
Conclusions:
- The jerk current presents a physical divergence not accounted for by standard models.
- This current's unique properties, including perpendicular components, warrant experimental verification.
Related Concept Videos
01:21Bulk Modulus
778
The bulk modulus is a scientific term used to describe a material's resistance to uniform compression. It is the proportionality constant that links a change in pressure to the resulting relative volume change.
778
01:22Bulk Density of Aggregate
1.2K
Bulk density refers to the mass of aggregate particles that would fill a unit volume. The concept of bulk density originates from the inability to pack aggregate particles in a manner that completely eliminates void spaces. Hence, the term bulk refers to the volume that encompasses both the aggregates and the voids. This measurement is crucial when aggregates are batched by volume and is used to convert quantities by mass to volume.
Most natural mineral aggregates, like sand and gravel,...
Most natural mineral aggregates, like sand and gravel,...
1.2K
01:10Moisture Content and Bulking of Aggregate
468
The moisture content of aggregates is a crucial factor in construction, particularly in concrete mixing, as it influences the total water required in the mix. Moisture content represents the water coated on the exterior surface of the aggregate existing in a saturated and surface-dry condition. The total water content of a moist aggregate is the sum of its moisture content and water absorption.
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
When aggregates are exposed to rain or sit in stockpiles, they absorb moisture, which must be...
468
01:10Electrical Current
7.2K
Electrical current is defined as the rate at which charge flows. When there is a large current present, such as that used to run a refrigerator, a large amount of charge moves through the wire in a small amount of time. If the current is small, such as that used to operate a handheld calculator, a small amount of charge moves through the circuit over a long period of time. The SI unit for current is the ampere (A), named for the French physicist André-Marie Ampère (1775–1836).
7.2K
01:21Current Density
5.1K
The total amount of current flowing through one unit value of a cross-sectional area is referred to as current density. If the current flow is uniform, the amount of current flowing through a conductor is the same at all points along the conductor, even if the conductor area varies. The current density consists of the local magnitude and direction of the charge flow, which varies from point to point. Current density is measured in amperes per meter square, and direction is defined as the net...
5.1K
01:25Eddy Currents
2.6K
Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
Other major applications of eddy currents appear in metal detectors and the braking systems of trains and roller...
2.6K