Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Drag01:23

Drag

181
Drag is a resistive force opposing an object’s motion through a fluid, resulting from surface pressure and shear forces. It comprises two components: a perpendicular one from pressure and a tangential one from shear stress. Accurate drag calculations use pressure and wall shear stress distributions, often determined through Computational Fluid Dynamics (CFD) or wind tunnel testing. The drag coefficient, a dimensionless measure, depends on factors like shape, Reynolds number, Mach number,...
181
Gauss's Law in Dielectrics01:17

Gauss's Law in Dielectrics

4.6K
Consider a polar dielectric placed in an external field. In such a dielectric, opposite charges on adjacent dipoles neutralize each other, such that the net charge within the dielectric is zero. When a polar dielectric is inserted in between the capacitor plates, an electric field is generated due to the presence of net charges near the edge of the dielectric and the metal plates interface. Since the external electrical field merely aligns the dipoles, the dielectric as a whole is neutral. An...
4.6K
Electrostatic Boundary Conditions in Dielectrics01:27

Electrostatic Boundary Conditions in Dielectrics

1.4K
When an electric field passes from one homogeneous medium to another, crossing the boundary between the two mediums imparts a discontinuity in the electric field. This results in electrostatic boundary conditions that depend on the type of mediums the field propagates through.
Consider a case where both the mediums across a boundary are two different dielectric materials. Recall that the electric field and electric displacement are proportional and related through the material's...
1.4K
Carrier Transport01:21

Carrier Transport

554
The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
554
Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

2.4K
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
2.4K
Inductance: Solid Cylindrical Conductor01:24

Inductance: Solid Cylindrical Conductor

367
To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...
367

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Geometrical properties of strained and twisted moiré heterostructures.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same author

Review of the tight-binding method applicable to the properties of moiré superlattices.

Physical chemistry chemical physics : PCCP·2025
Same author

Entanglement harvesting in buckled honeycomb lattices by vacuum fluctuations in a microcavity.

Journal of physics. Condensed matter : an Institute of Physics journal·2024
Same author

Correlations in twisted double-layer graphene with virtual photons in a microcavity.

Journal of physics. Condensed matter : an Institute of Physics journal·2021
Same author

Fermi velocity reduction in graphene due to enhanced vacuum fluctuations.

Journal of physics. Condensed matter : an Institute of Physics journal·2021
Same author

Heat capacity in doped graphene under magnetic fields: the role of spin splitting.

Journal of physics. Condensed matter : an Institute of Physics journal·2020

Related Experiment Video

Updated: Sep 4, 2025

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.6K

Cavity-mediated drag in double-layer graphene.

F Escudero1,2, J S Ardenghi1,2

  • 1Departamento de Física, Universidad Nacional del Sur, Av. Alem 1253, B8000 Bahía Blanca, Argentina.

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|July 15, 2022
PubMed
Summary

We discovered a new photon-mediated drag in graphene, distinct from Coulomb drag. This novel interaction, influenced by cavity effects, becomes dominant as layer separation and carrier density increase.

Keywords:
Coulomb dragcavity electrodynamicsfrictional draggraphene

More Related Videos

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
04:56

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

242
Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

6.2K

Related Experiment Videos

Last Updated: Sep 4, 2025

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.6K
Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
04:56

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

242
Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
11:24

Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices

Published on: July 11, 2025

6.2K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Optics

Background:

  • Frictional drag between layered materials is crucial for understanding electron interactions.
  • Coulomb drag is the established mechanism for interlayer friction in 2D electron systems.
  • Cavity quantum electrodynamics offers new pathways for controlling electron interactions.

Purpose of the Study:

  • To investigate the frictional drag mechanisms between two parallel graphene layers within an optical cavity.
  • To identify and characterize novel contributions to interlayer drag beyond the conventional Coulomb interaction.
  • To explore the influence of cavity-mediated photon interactions on graphene drag properties.

Main Methods:

  • Theoretical modeling of electron-electron interactions in bilayer graphene.
  • Analysis of Coulomb and photon-mediated drag contributions.
  • Investigation of the role of interlayer separation (d) and carrier density (n).
  • Consideration of electromagnetic field enhancement within the cavity.

Main Results:

  • Identified two distinct drag contributions: Coulomb drag and a novel photon-mediated drag.
  • Photon-mediated drag arises from cavity-enhanced interactions with suppressed backscattering and weak screening.
  • Photon-mediated drag resistivity shows deviations from the quadratic temperature dependence in the Fermi-liquid regime.
  • Observed slow decay of photon-mediated drag with increasing interlayer separation (d) and a 1/n^2 dependence on carrier density (n).

Conclusions:

  • Coulomb drag dominates at small interlayer separations and carrier densities.
  • A transition to purely photon-mediated drag occurs as d and n increase.
  • The onset of this transition is sensitive to the electromagnetic field enhancement within the cavity.
  • This work reveals new physics in coupled 2D systems mediated by photonic environments.