Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
TT: Fachverband Tiefe Temperaturen
TT 16: Poster: Transport
TT 16.12: Poster
Montag, 27. März 2023, 15:00–18:00, P2/OG4
Electron correlation and confinement effects in quasi-one-dimensional quantum wires at high-density — Ankush Girdhar1, Vinod Ashokan1, Neil Drummond2, •Klaus Morawetz3,4, and Kare Narain Pathak5 — 1Department of Physics, Dr. B.R. Ambedkar National Institute of Technology, Jalandhar (Punjab), 144 011, India — 2Department of Physics, Lancaster University, Lancaster LA1 4YB, United Kingdom — 3Münster University of Applied Sciences, Stegerwaldstrasse 39, 48565 Steinfurt, Germany — 4International Institute of Physics- UFRN,Campus Universitário Lagoa nova,59078-970 Natal, Brazil — 5Centre for Advanced Study in Physics, Panjab University, 160014 Chandigarh, India
The correlation energy, pair-correlation function, static structure factor, and momentum density of ferromagnetic quasi-one-dimensional quantum wires are calculated using the quantum Monte Carlo (QMC) method for various wire widths b and density parameters rs. The peak in the static structure factor at k=2kF grows as the wire width decreases. The Tomonaga-Luttinger liquid parameter Kρ is found to increase by about 10% between wire widths b=0.01 and b=0.5. The ground-state properties of finite thickness wires is compared to the first-order random phase approximation (RPA), which is exact in the high-density limit. Analytical expressions for the static structure factor and correlation energy are derived.
[1] Eur. Phys. J. B 91 (2018) 29
[2] Phys. Rev. B 97 (2018) 155147
[3] Phys. Rev. B 101 (2020) 075130
[4] Phys. Rev. B 104 (2021) 035149
[5] Phys. Rev. B 105 (2022) 115140