Physics:Semi-Dirac fermion

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Short description: Class of fermionic quasiparticles

In condensed matter physics, semi-Dirac fermions are a class of quasiparticles that are fermionic with the unusual property that their energy dispersion relation changes from quadratic to linear dependent on their direction of motion.[1] Their theoretical properties have been studied prior to their observation in 2024.[2][3]

Their first observation in a solid was in zirconium silicon sulfide (ZrSiS), a topological semi-metal, and was published in 2024.[4]

See also

References

  1. ↑ "Particle that only has mass when moving in one direction observed for first time | Penn State University". https://www.psu.edu/news/research/story/particle-only-has-mass-when-moving-one-direction-observed-first-time. 
  2. ↑ Uryszek, Mikolaj D.; Christou, Elliot; Jaefari, Akbar; Krüger, Frank; Uchoa, Bruno (2019-10-01). "Quantum criticality of semi-Dirac fermions in 2 + 1 dimensions" (in en). Physical Review B 100 (15). doi:10.1103/PhysRevB.100.155101. ISSN 2469-9950. Bibcode: 2019PhRvB.100o5101U. https://link.aps.org/doi/10.1103/PhysRevB.100.155101. 
  3. ↑ Mohanta, Narayan; Ok, Jong Mok; Zhang, Jie; Miao, Hu; Dagotto, Elbio; Lee, Ho Nyung; Okamoto, Satoshi (2021-12-10). "Semi-Dirac and Weyl fermions in transition metal oxides" (in en). Physical Review B 104 (23). doi:10.1103/PhysRevB.104.235121. ISSN 2469-9950. Bibcode: 2021PhRvB.104w5121M. https://journals.aps.org/prb/abstract/10.1103/PhysRevB.104.235121. 
  4. ↑ Shao, Yinming (2024). "Semi-Dirac Fermions in a Topological Metal". Physical Review X 14 (4). doi:10.1103/PhysRevX.14.041057. Bibcode: 2024PhRvX..14d1057S. https://journals.aps.org/prx/abstract/10.1103/PhysRevX.14.041057. 




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