Neutron Capture on the s-Process Branching Point 171Tm via Time-of-Flight and Activation

Scientific paper - Original scientific paper

• Author: Z. Rukelj
• Author: C. C. Homes
• Author: M. Orlita
• Author: Ana Akrap
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

Here we study the static and dynamic transport properties of a low-energy two-band model proposed previously in Martino et al. [PRL 122, 217402 (2019)], with an anisotropic in-plane linear momentum dependence and a parabolic out-of-plane dispersion. The model is extended to include a negative band gap, which leads to the emergence of a Weyl semimetal (WSM) state, as opposed to the gapped semimetal (GSM) state when the band gap is positive. We calculate and compare the zero- and finite-frequency transport properties of the GSM and WSM cases. The DC properties that are calculated for the GSM and WSM cases are Drude spectral weight, mobility, and resistivity. We determine their dependence on the Fermi energy and crystal direction. The in- and out-of-plane optical conductivities are calculated in the limit of the vanishing interband relaxation rate for both semimetals. The main common features are an ω^1/2 in-plane and ω^3/2 out-of-plane frequency dependence of the optical conductivity. We seek particular features related to the charge transport that could unambiguously point to one ground state over the other, based on the comparison with the experiment. Differences between the WSM and GSM are in principle possible only at extremely low carrier concentrations and at low temperatures.

• 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. 12, 125201
• p-ISSN: 2469-9950
• e-ISSN: 2469-9969
• DOI: https://doi.org/10.1103/PhysRevB.102.125201
• URN:NBN: urn:nbn:hr:217:289032
• Publication: 2020
• Document URL: https://link.aps.org/doi/10.1103/PhysRevB.102.125201
• Type of resource: Text
• Access conditions: Open access
• Public note: © 2020 American Physical Society. Received 29 May 2020; revised 20 August 2020; accepted 27 August 2020; published 10 September 2020.
• Created on: 2020-11-21 21:22:01