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

The Hall Effect01:30

The Hall Effect

2.4K
Edwin H. Hall, in the year 1879, devised an experiment that could be used to identify the polarity of the predominant charge carriers in a conducting material. From a historical perspective, this experiment was the first to demonstrate that the charge carriers in most metals are negative.
2.4K
Rapidly Varying Flow01:24

Rapidly Varying Flow

61
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
61
Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

74
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
74
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

919
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
919
Gradually Varying Flow01:29

Gradually Varying Flow

49
Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...
49
Effects of Creep01:25

Effects of Creep

140
Creep in concrete, the gradual deformation under prolonged stress, significantly impacts the integrity of structures. For reinforced concrete beams, it can be a vital design consideration, as it increases deflection, sometimes necessitating additional design measures. In columns, especially slender ones under eccentric loads, creep can cause buckling, compromising their stability. However, creep can be beneficial in indeterminate structures by mitigating stresses that arise from shrinkage,...
140

You might also read

Related Articles

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

Sort by
Same author

Nonlinear Electrical Transport Unveils Fermi Surface Malleability in a Moiré Heterostructure.

Nano letters·2024
Same author

Navigating dermatological care: Experience with assisted teledermatology practice on e-Sanjeevani platform.

Journal of the European Academy of Dermatology and Venereology : JEADV·2024
Same author

Light-Chain Deposition Diseases of the CNS: Review of Pathogenesis, Imaging Features, and Radiographic Mimics.

AJNR. American journal of neuroradiology·2024
Same author

Fear of Coronavirus Disease 2019 among People with Epilepsy.

The Journal of the Association of Physicians of India·2024
Same author

Managing outbreak of community-onset paediatric impetigo in underserved areas of North India via teledermatology: A tertiary care centre's experience.

Indian journal of dermatology, venereology and leprology·2024
Same author

Meningioma: Molecular Updates from the 2021 World Health Organization Classification of CNS Tumors and Imaging Correlates.

AJNR. American journal of neuroradiology·2024
Same journal

Erratum: Bacterial Turbulence at Compressible Fluid Interfaces [Phys. Rev. Lett. 136, 138301 (2026)].

Physical review letters·2026
Same journal

Unveiling Light-Quark Yukawa Flavor Structure via Dihadron Fragmentation at Lepton Colliders.

Physical review letters·2026
Same journal

Adaptable Route to Fast Coherent State Transport via Bang-Bang-Bang Protocols.

Physical review letters·2026
Same journal

Topological Transition and Emergence of Elasticity of Dislocation in Skyrmion Lattice: Beyond Kittel's Magnetic-Polar Analogy.

Physical review letters·2026
Same journal

Pound-Drever-Hall Method for Superconducting-Qubit Readout.

Physical review letters·2026
Same journal

Coupling a ^{73}Ge Nuclear Spin to an Electrostatically Defined Quantum Dot in Silicon.

Physical review letters·2026
See all related articles

Related Experiment Video

Updated: Jun 30, 2025

Visualizing Hyporheic Flow Through Bedforms Using Dye Experiments and Simulation
09:49

Visualizing Hyporheic Flow Through Bedforms Using Dye Experiments and Simulation

Published on: November 18, 2015

12.2K

Nonlinear Valley Hall Effect.

Kamal Das1,2, Koushik Ghorai1, Dimitrie Culcer3,4

  • 1Department of Physics, Indian Institute of Technology, Kanpur-208016, India.

Physical Review Letters
|March 15, 2024
PubMed
Summary
This summary is machine-generated.

We discovered a new nonlinear mechanism to create a valley Hall current in materials with specific symmetries. This nonlinear valley Hall effect can be controlled in inversion-symmetric systems, paving the way for nonlinear valleytronics.

More Related Videos

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
00:09

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

5.6K
Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
09:17

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

10.7K

Related Experiment Videos

Last Updated: Jun 30, 2025

Visualizing Hyporheic Flow Through Bedforms Using Dye Experiments and Simulation
09:49

Visualizing Hyporheic Flow Through Bedforms Using Dye Experiments and Simulation

Published on: November 18, 2015

12.2K
Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
00:09

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole

Published on: August 26, 2019

5.6K
Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
09:17

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

10.7K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Mechanics

Background:

  • The conventional valley Hall effect relies on breaking inversion symmetry and involves valley-contrasting Berry curvature.
  • Linear and second-order charge Hall currents, as well as linear valley Hall currents, are typically absent in systems with both inversion and time-reversal symmetry.

Purpose of the Study:

  • To propose and demonstrate a novel nonlinear mechanism for generating a valley Hall current.
  • To achieve valley Hall current generation in systems possessing both inversion and time-reversal symmetry.
  • To explore the potential of nonlinear valleytronics for controlling the valley degree of freedom.

Main Methods:

  • Theoretical proposal of a nonlinear mechanism based on electric field correction to Berry curvature.
  • Engineering of valley-contrasting anisotropic dispersion.
  • Experimental demonstration in tilted massless Dirac fermions within strained graphene and organic semiconductors.

Main Results:

  • A second-order valley Hall signal emerges due to the electric field correction to Berry curvature.
  • The nonlinear valley Hall effect is successfully demonstrated in specific material systems.
  • This mechanism operates even when linear Hall effects and linear valley Hall effects are suppressed.

Conclusions:

  • The study establishes a new pathway for valley Hall current generation in inversion-symmetric systems.
  • This nonlinear mechanism offers a route to control the valley degree of freedom.
  • The findings open avenues for the development of nonlinear valleytronics.