SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 16: Poster: Transport
TT 16.13: Poster
Montag, 27. März 2023, 15:00–18:00, P2/OG4
Ground state properties of electron-electron biwire systems — Rajesh O. Sharma1, Neil Drummond2, Vinod Ashokan1, Kare Narain Pathak3, and •Klaus Morawetz4,5 — 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 — 3Centre for Advanced Study in Physics, Panjab University, 160014 Chandigarh, India — 4Münster University of Applied Sciences, Stegerwaldstrasse 39, 48565 Steinfurt, Germany — 5International Institute of Physics- UFRN,Campus Universitário Lagoa nova,59078-970 Natal, Brazil
Variational Monte Carlo (VMC) method is used to study the ground-state properties of a parallel infinitely-thin electron-electron quantum biwire system. The ground-state energy, the correlation energy, the interaction energy, the pair-correlation function (PCF), the static structure factor (SSF), and the momentum distribution (MD) function is calculated. As two parallel wires approach each other, inter-wire correlations increase while intra-wire correlations decrease. The SSF shows a peak at 2kF at higher densities. A second peak starts to appear at 4kF when rs = 2 and d = 0.2 a.u. For lower densities, the first peak completely disappears and the height of the second peak keeps increasing with rs and d. The behaviour of the PCF and SSF show that the electron-electron biwire system under goes into a quasi-Wigner crystalline state at densities higher compared to the case of a single wire.
[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]