DC and optical signatures of the reconstructed Fermi surface for electrons with parabolic band

Scientific paper - Original scientific paper

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

Abstract (english)

We study the main intra-band and inter-band transport properties at zero temperature of free electron-like system undergoing a topological reconstruction of the Fermi surface for the two-dimensional and three-dimensional case. The calculated intra-band properties include the single-particle density of states, the total and the effective concentrations of electrons and the thermopower. As for the inter-band case, the real part of the conductivity has been calculated within the vanishing inter-band relaxation approximation as a function of the incident photon energy.Within this approach, it is shown that the optical conductivity has a nonvanishing component parallel to the reconstruction wave vector and the shape which depends on the value of the Fermi energy. Each dimensionality has its particular features in the transport quantities presented in the paper, which are discussed and compared with those in the free electron scenario. Finally, we identify the signature of the topological reconstruction of the Fermi surface in the intra-band and inter-band transport functions.

• Keywords (english): optical conductivity; Fermi surface; thermopower; van Hove singularity; Lifshitz transition; charge density wave; DC carrier concentration
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: New Journal of Physics
• Numbering: vol. 24, no. 5, 053024
• e-ISSN: 1367-2630
• DOI: https://doi.org/10.1088/1367-2630/ac696d
• URN:NBN: urn:nbn:hr:217:204174
• Publication: 2022-05-10
• Project: Number: IP-2016-06-2289; Title (croatian): Kolektivni efekti, tunelirajući i topološki transport u novim nanospojevima; Title (english): Collective effects, tunneling and topological transport in novel nanojunctions; Acronym: C3TiNN; Leader: Danko Radić; Jurisdiction: Croatia; Funding stream: Research Projects
• Project: Number: KK.01.1.1.01.0004; Title (croatian): Provedba vrhunskih istraživanja u sklopu Znanstvenog centra izvrsnosti za kvantne i kompleksne sustave te reprezentacije Liejevih algebri; Title (english): Implementation of top research within the Scientific Center of Excellence for Quantum and Complex Systems, and Representations of Lie Algebras; Acronym: QuantiXLie; Leader: Hrvoje Buljan; Jurisdiction: eu; Funding stream: European Regional Development Fund
• Document URL: https://iopscience.iop.org/article/10.1088/1367-2630/ac696d
• Type of resource: Text
• Access conditions: Open access
• Public note: Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Received 8 February 2022; Revised 20 April 2022; Accepted for publication 22 April 2022; Published 10 May 2022.
• Created on: 2024-08-31 21:13:33