Dynamical conductivity of lithium-intercalated hexagonal boron nitride films: A memory function approach

Scientific paper - Original scientific paper

• Author: Zoran Rukelj
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

This work is a study of dynamical conductivity of a quasi-two-dimensional heterostructure Li(BN)8. The conducting electrons have a free-electron-like parabolic dispersion and are assumed to scatter only on acoustic phonons. The approach used to derive the generalized Drude relation with frequency and temperature dependent relaxation consists of defining the induced current density as a function of the electron-hole operator. This element is proportional to the perturbating electric field and is decomposed into the zeroth and second order of the electron-phonon interaction. The electron-hole operator is then evaluated using the Heisenberg equation. The connection between the electron-hole operator and the memory function is shown. The analytical properties of the imaginary and real part of the frequency and temperature dependent memory function, that describe electron scattering on acoustic and optical phonons, are examined in detail. Finally, the dynamical conductivity of Li(BN)8 is calculated, with the explanation of all relevant features originating from the memory function.

• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Physical Review B
• Numbering: vol. 102, no. 20, 205108
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.102.205108
• URN:NBN: urn:nbn:hr:217:517302
• Publication: 2020
• Document URL: https://link.aps.org/doi/10.1103/PhysRevB.102.205108
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2020 American Physical Society. Received 25 June 2020; revised 14 September 2020; accepted 12 October 2020; published 9 November 2020.
• Created on: 2020-12-01 11:19:51