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 joint research team that included members from Tohoku University has unveiled a new topological insulator (TI), a unique state of matter that differs from conventional metals, insulators, and semiconductors.
Condensed Matter
Jun 19, 2024
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207
Photonic alloys, alloy-like materials combining two or more photonic crystals, are promising candidates for the development of structures that control the propagation of electromagnetic waves, also known as waveguides. Despite ...
Topological quantum materials are hailed as a cornerstone of future technological advancements. Yet, validating their exceptional qualities has always been a lengthy process.
Condensed Matter
May 16, 2024
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120
Despite its promising characteristics in condensed matter physics, the triply-degenerate semimetal PtBi2 has been largely unexplored in practical applications, particularly in semiconductor technology. The main difficulties ...
Condensed Matter
May 14, 2024
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74
MIT physicists and colleagues have created a five-lane superhighway for electrons that could allow ultra-efficient electronics and more. The work, reported in the May 9 issue of Science, is one of several important discoveries ...
Condensed Matter
May 13, 2024
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467
According to research published in Physical Review Research, a research team led by Prof. Luo Xuan from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences discovered the existence of stacking faults ...
Condensed Matter
May 9, 2024
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128
A research group led by Prof. Li Xingxing of University of Science and Technology of China (USTC) of Chinese Academy of Chinese (CAS) made a reversible topological control in 2D organometallic lattices achieved through tautomerization. ...
Condensed Matter
Apr 29, 2024
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63
The quantum anomalous Hall effect (QAHE) has unique advantages in topotronic applications, but realizing the QAHE with tunable magnetic and topological properties for building functional devices is still a key scientific ...
Condensed Matter
Apr 23, 2024
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94
In some materials, spins form complex magnetic structures within the nanometer and micrometer scale in which the magnetization direction twists and curls along specific directions. Examples of such structures are magnetic ...
Condensed Matter
Apr 17, 2024
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184
Physicists have observed a novel quantum effect termed "hybrid topology" in a crystalline material. This finding opens up a new range of possibilities for the development of efficient materials and technologies for next-generation ...
Condensed Matter
Apr 10, 2024
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