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

Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

3.7K
Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
3.7K
Types Of Superconductors01:28

Types Of Superconductors

1.5K
A superconductor is a substance that offers zero resistance to the electric current when it drops below a critical temperature. Zero resistance is not the only interesting phenomenon as materials reach their transition temperatures. A second effect is the exclusion of magnetic fields. This is known as the Meissner effect. A light, permanent magnet placed over a superconducting sample will levitate in a stable position above the superconductor. High-speed trains that levitate on strong...
1.5K
Semiconductors01:22

Semiconductors

1.3K
There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...
1.3K
Theory of Metallic Conduction01:17

Theory of Metallic Conduction

1.7K
The conduction of free electrons inside a conductor is best described by quantum mechanics. However, a classical model makes predictions close to the results of quantum mechanics. It is called the theory of metallic conduction.
In this theory, Newton's second law of motion is used to determine the acceleration of an electron in the presence of an applied electric field. Then, its velocity is expressed via this acceleration.
An electron moves through the crystal, containing positive ions,...
1.7K
Network Covalent Solids02:18

Network Covalent Solids

15.9K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
15.9K
Conductors and Insulators01:19

Conductors and Insulators

10.3K
Some materials may easily let electrical charges pass through them, while others obstruct their flow. The former are called conductors and the latter insulators. The atomic structures of materials determine whether they are conductors or insulators of electricity.
Most metals are conductors. Their atomic configuration is such that one or more electron(s) are loosely bound to the nucleus in each atom. Thus, a sea of mobile electrons are available in them, known as free electrons. Their easy...
10.3K

You might also read

Related Articles

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

Sort by
Same author

Gate-tunable giant negative magnetoresistance in tellurene driven by quantum geometry.

Nature communications·2026
Same author

Reaching maximum efficiency in quantum Stirling engines using multilayer graphene.

Physical review. E·2026
Same author

Rational Design of Metal Oxide Nanostructures via Dopant Control: A Case Study in Photoelectrochemical Performance.

ACS applied materials & interfaces·2025
Same author

Persistent spin textures, altermagnetism and charge-to-spin conversion in metallic chiral crystals TM<sub>3</sub>X<sub>6</sub>.

Npj spintronics·2025
Same author

Quantum Geometry and the Electric Magnetochiral Anisotropy in Noncentrosymmetric Polar Media.

Physical review letters·2025
Same author

Unveiling composition-properties relationships inMo1-xWxSe2alloys: a theoretical and experimental study.

Nanotechnology·2025
Same journal

Higher-Order Clustering of Receptors Real-Time Projected by Plasmon-ruler on the Single Live Cell.

Nano letters·2026
Same journal

Achieving Fermi-Level Depinning and Ideal Metal Contact in <i>β</i>-Ga<sub>2</sub>O<sub>3</sub> Devices via MXene Integration.

Nano letters·2026
Same journal

AI-Assisted Electron Microscopy in Structure-Performance Analysis of Advanced Catalysts: From Atomic Resolution to Statistical Significance.

Nano letters·2026
Same journal

Electrically Switchable Ultraslow Dispersionless Polaritons via Twist Engineering in van der Waals Heterostructures.

Nano letters·2026
Same journal

Correction to "Ultrasonication-Triggered Ubiquitous Assembly of Magnetic Janus Amphiphilic Nanoparticles in Cancer Theranostic Applications".

Nano letters·2026
Same journal

Tunable Proximity Valley Splitting Via Interfacial Exchange Pinning in WSe<sub>2</sub>-CrBr<sub>3</sub>-CrPS<sub>4</sub> Heterostructures.

Nano letters·2026
See all related articles

Related Experiment Video

Updated: Jan 4, 2026

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

10.4K

Toward Realistic Amorphous Topological Insulators.

Marcio Costa1, Gabriel R Schleder1,2, Marco Buongiorno Nardelli3

  • 1Brazilian Nanotechnology National Laboratory (LNNano) , CNPEM , 13083-970 Campinas , Brazil.

Nano Letters
|November 5, 2019
PubMed
Summary
This summary is machine-generated.

Amorphous materials, not just crystalline ones, can be topological insulators. This study shows amorphous bismuthene exhibits topological insulator properties, opening new avenues for materials science.

Keywords:
2DAmorphousbismuthenedensity functional theory (DFT)electronic transporttopological insulator

More Related Videos

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

11.9K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.9K

Related Experiment Videos

Last Updated: Jan 4, 2026

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

10.4K
Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
10:36

Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating

Published on: April 12, 2018

11.9K
Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

8.9K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Chemistry

Background:

  • Topological properties of materials are traditionally linked to crystalline structures.
  • Recent research suggests amorphous systems can exhibit non-trivial topology.
  • Translational symmetry is not a strict requirement for topological phases.

Purpose of the Study:

  • To investigate topological insulator properties in two-dimensional amorphous materials.
  • To present a realistic study of amorphous bismuthene's electronic and transport characteristics.
  • To demonstrate that amorphous bismuthene can function as a topological insulator.

Main Methods:

  • Utilizing *ab initio* calculations for electronic structure analysis.
  • Investigating the transport properties of amorphous bismuthene.
  • Characterizing topological properties using the topological index (Z2).

Main Results:

  • Confirmed that two-dimensional amorphous materials can exhibit topological insulator properties.
  • Amorphous bismuthene systems were identified as topological insulators.
  • Characterized by a topological index Z2 = 1 and bulk-edge duality.
  • Demonstrated quantized linear conductance within the topological gap.

Conclusions:

  • Amorphous bismuthene is a realistic material exhibiting topological insulator properties.
  • The findings challenge the traditional association of topology with crystalline structures.
  • This research paves the way for exploring amorphous topological insulators experimentally and theoretically.