High-harmonic generation in semi-Dirac and Weyl semimetals with broken time-reversal symmetry: exploration of the merging of Weyl nodes

Medic, Luka (author), Mravlje, Jernej (author), Ramšak, Anton (author), Rejec, Tomaž (author)

We explore anomalous high-harmonic generation in a model that realizes a transition from a broken time-reversal symmetry Weyl semimetal to a semi-Dirac regime, i.e., a gapless semimetal with dispersion that is parabolic in one direction and conical in the other two. We point out the intensity of the induced anomalous high harmonics is high in the semi-Dirac regime. For Weyl semimetals, we reveal anomalous high harmonics are due to excitations at momenta where the dispersion is not strictly linear and that in the linearized low-energy theory the anomalous response is harmonic only. Our findings aid in the experimental characterizations of Weyl, Dirac, and semi-Dirac semimetals.

• Language: English
• Keywords: condensed matter physics
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FMF - Faculty of Mathematics and Physics
• Publication status: Published
• Publication version: Author Accepted Manuscript
• Publication date: 13.05.2024
• Year: 2024
• Number of pages: Str. 205130-1-205130-6
• Numbering: Vol. 109, iss. 20
• PID: 20.500.12556/RUL-156340
• UDC: 538.9
• ISSN on article: 2469-9950
• DOI: 10.1103/PhysRevB.109.205130
• COBISS.SI-ID: 195400707
• Publication date in RUL: 21.05.2024

Record is a part of a journal

• Title: Physical review
• Publisher: American Physical Society
• ISSN: 2469-9950
• COBISS.SI-ID: 2997348

Secondary language

• Language: Slovenian
• Keywords: fizika kondenzirane snovi