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Transport signatures of anisotropic tilted Dirac cones in 8-Pmmn borophene

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Abstract

We present a theoretical study of electronic transport in a two-dimensional 8-Pmmn monolayer borophene crystal illuminated by off-resonant electromagnetic radiation within the linear response theory. We find asymmetry in the intrinsic anomalous Hall conductivity of the system, hallmark of anisotropic tilted structure of the Dirac cones in borophene. The width of maximum in the Hall conductivity is of the order of the bandgap in the energy spectrum induced by the radiation. Interestingly, thermal and Peltier conductivities also exhibit pronounced asymmetry in addition to the Hall conductivity of the system. It is shown that such asymmetry in the conductivity originates from the anisotropic tilt in the Dirac cone of borophene. We also find that 8-Pmmn borophene makes transition from type-I to type-II Dirac fermion system in the limit of large tilt parameter.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: This is a theoretical study with no experimental data].

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Acknowledgements

This research work was supported by the Office of Research, Innovation and Commercialization (ORIC), Kohat University of Science and Technology, Kohat through Project No.OFP-20(6)9.

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Authors and Affiliations

  1. Department of Physics, Kohat University of Science and Technology, Kohat, 26000, Khyber Pakhtunkhwa, Pakistan

    Abdullah Yar & Noor Ul Wahab

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  1. Abdullah Yar
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  2. Noor Ul Wahab
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Contributions

Abdullah Yar carried out the modeling and calculations, prepared the manuscript. Noor Ul Wahab contributed to the discussion of the whole paper.

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Correspondence to Abdullah Yar.

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Yar, A., Wahab, N.U. Transport signatures of anisotropic tilted Dirac cones in 8-Pmmn borophene. Eur. Phys. J. B 95, 123 (2022). https://doi.org/10.1140/epjb/s10051-022-00389-8

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