Topological materials are condensed-matter systems whose electronic or quasiparticle excitations are characterized by nontrivial topological invariants in momentum space, leading to robust boundary or defect states protected by symmetries such as time-reversal, crystalline, or particle–hole symmetry. Their bulk band structure exhibits features like band inversion and topological band gaps, enabling phenomena such as dissipationless edge or surface conduction, Dirac or Weyl fermions, and Majorana bound states. As physical systems, they serve as platforms for studying topological phases of matter, spin–orbit coupling effects, and emergent gauge fields, with relevance to quantum transport, spintronics, and topological quantum computation.
A kind of umbilical cord between different quantum states can be found in some materials. Researchers at TU Wien have now shown that this "umbilical cord" is generic to many materials.
Condensed Matter
Jan 20, 2025
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90
A team of physicists led by The City College of New York's Lia Krusin-Elbaum has developed a novel technique that uses hydrogen cations (H+) to manipulate relativistic electronic bandstructures in a magnetic Weyl semimetal—a ...
Quantum Physics
Jan 11, 2025
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399
In-plane magnetic fields are responsible for inducing anomalous Hall effect in EuCd2Sb2 films, report researchers from the Institute of Science Tokyo. By studying how these fields change electronic structures, the team discovered ...
Condensed Matter
Dec 19, 2024
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96
In recent years, topological materials have been studied extensively. A typical example of a topological material is a topological insulator, which is a unique insulator that does not conduct electricity inside the material, ...
Condensed Matter
Nov 20, 2024
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52
MIT physicists have taken a key step toward solving the puzzle of what leads electrons to split into fractions of themselves. Their solution sheds light on the conditions that give rise to exotic electronic states in graphene ...
Condensed Matter
Nov 19, 2024
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138
Researchers at Università Cattolica, Brescia campus, have discovered that the transition from insulating to conductive behavior in certain materials is driven by topological defects in the structure.
Condensed Matter
Nov 15, 2024
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70
Researchers have taken a novel approach to studying the interaction between certain topological metamaterials and sound wave propagation.
Nanophysics
Nov 12, 2024
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42
The Korea Research Institute of Standards and Science (KRISS) has, for the first time in the world, generated and controlled skyrmions at room temperature in two-dimensional (2D) materials. This achievement reduces power ...
Condensed Matter
Nov 6, 2024
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86
Science can be difficult to explain to the public. In fact, any subfield of science can be difficult to explain to another scientist who studies in a different area. Explaining a theoretical science concept to high school ...
General Physics
Nov 5, 2024
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96
For the first time since the discovery of the material MnBi2Te4 (MBT), researchers at the University of Twente have successfully made it behave like a superconductor. This marks an important step in understanding MBT and ...
Superconductivity
Oct 23, 2024
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85
