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

Equivalent Capacitance01:19

Equivalent Capacitance

Multiple capacitors can be connected in a circuit in series or parallel configuration. When the capacitor combination is connected to a battery, the potential drop across each capacitor and the magnitude of charge stored in the individual capacitor depends on the type of the connection. The capacitor combination is replaced by a single equivalent capacitor that stores the same amount of charge as the combination for a given potential difference.
The following strategies are adopted to calculate...
Equivalent Capacitance01:19

Equivalent Capacitance

From the study of resistive circuits, it is understood that employing a series-parallel combination serves as an effective strategy for simplifying circuits. Capacitors can be arranged within a circuit in one of two ways: a series configuration or a parallel configuration. The way these capacitors are connected to a battery will influence both the potential drop across each individual capacitor and the size of the charge that each capacitor can store. This is determined by the specific type of...
Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Capacitors and Capacitance01:18

Capacitors and Capacitance

A device consisting of two electrical conductors that are separated by a distance and used to store electrical charges is called a capacitor. The space between the conductors is either a vacuum or an insulating material, called a dielectric. Capacitors have many applications, ranging from filtering static from radio reception to energy storage in heart defibrillators.
When the conductors are two identical parallel plates, it is called a parallel plate capacitor. When battery terminals are...
Valence Bond Theory02:42

Valence Bond Theory

Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...

You might also read

Related Articles

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

Sort by
Same author

Room-Temperature Intrinsic Nonlinear Planar Hall Effect in TaIrTe_{4}.

Physical review letters·2026
Same author

Targeting the FABP4-PPARγ axis with IPA improves obesity-related glomerulopathy.

Biochimica et biophysica acta. Molecular basis of disease·2026
Same author

Learning-driven multi-timescale operation simulation and hierarchical boundary optimization for renewable-dominated energy systems under temporal and scenario uncertainties.

Scientific reports·2026
Same author

Corrigendum to: "SUMO2-mediated SUMOylation of SH3GLB1 promotes ionizing radiation-induced hypertrophic cardiomyopathy through mitophagy activation'' [Europ. J. Pharmacol. 5 (2022) 174980 59897].

European journal of pharmacology·2026
Same author

Acoustoelectric control of optoelectronic anisotropy for reconfigurable polarimetry.

Science advances·2026
Same author

Symmetry-Protected Moiré Band Engineering and Enhanced Electron-Phonon Coupling in Xe/Bi<sub>2</sub>Se<sub>3</sub> Superlattices: Path to Topological Superconductivity.

ACS nano·2026
Same journal

Application of ephrin-B2 loaded glycol chitosan-silk fibroin hydrogel in the treatment of diabetic refractory wounds.

Scientific reports·2026
Same journal

International expert Delphi consensus on thromboprophylaxis in metabolic and bariatric surgery.

Scientific reports·2026
Same journal

Assessing the cross-region knowledge transfer capability of selected deep learning building vectorization methods in the context of available training datasets.

Scientific reports·2026
Same journal

Feasibility and preliminary effects of outdoor versus indoor cognitive-motor therapy in women with Alzheimer's disease: A randomized single-blind pilot study.

Scientific reports·2026
Same journal

Hallmarks of social action in the vocal turn-taking of wild common marmosets (Callithrix jacchus).

Scientific reports·2026
Same journal

Role and mechanism of AOPPs-induced NOX4-mediated ferroptosis in intervertebral disc degeneration.

Scientific reports·2026
See all related articles

Related Experiment Video

Updated: May 18, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Quantum capacitance in topological insulators.

Faxian Xiu1, Nicholas Meyer, Xufeng Kou

  • 1Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa, USA. Faxian@iastate.edu

Scientific Reports
|September 21, 2012
PubMed
Summary
This summary is machine-generated.

Researchers observed topological helical states in topological insulators using quantum capacitance measurements. This method overcomes bulk carrier interference, enabling clear detection of surface states at higher temperatures.

More Related Videos

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Scanning-probe Single-electron Capacitance Spectroscopy
10:53

Scanning-probe Single-electron Capacitance Spectroscopy

Published on: July 30, 2013

Related Experiment Videos

Last Updated: May 18, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Scanning-probe Single-electron Capacitance Spectroscopy
10:53

Scanning-probe Single-electron Capacitance Spectroscopy

Published on: July 30, 2013

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Phenomena

Background:

  • Topological insulators possess unique surface states protected by time-reversal symmetry.
  • These states theoretically exhibit a quantum spin Hall effect, crucial for spintronics.
  • Conventional transport measurements are hindered by dominant bulk carriers, obscuring surface state detection.

Purpose of the Study:

  • To experimentally detect topological helical states in topological insulators.
  • To overcome limitations of conventional transport measurements for surface state analysis.
  • To enable the study of topological properties at higher temperatures.

Main Methods:

  • Utilized quantum capacitance measurements to probe topological helical states.
  • Employed high excitation frequencies to minimize bulk carrier interference.
  • Observed Shubnikov-de Haas oscillations as a signature of topological surface states.

Main Results:

  • Successfully observed Shubnikov-de Haas oscillations originating from topological helical states.
  • Quantum capacitance measurements effectively distinguished surface states from bulk carriers.
  • Demonstrated access to surface states at temperatures up to 60 K.

Conclusions:

  • Quantum capacitance measurements offer a viable method for studying topological insulator surface states.
  • This technique overcomes challenges posed by bulk carriers in conventional transport measurements.
  • The findings pave the way for exploring exotic topological properties at higher temperatures, potentially including room temperature.