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Semi-Dirac fermion

Class of fermionic quasiparticles From Wikipedia, the free encyclopedia

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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]

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