Nonreciprocal Coulomb drag between quantum wires in the quasi-one-dimensional regime

Makaju, R.; Kassar, H.; Daloglu, S. M.; Huynh, A.; Laroche, D.; Levchenko, A.; Addamane, S. J.

doi:10.1103/physrevb.109.085101

Cited by 2 publications

(1 citation statement)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first approach involves lateral coupling of the wires using an electrostatic gate. This design facilitates the creation of a quantum structure with adjustable density, such as those mentioned in references [39][40][41][42]. The majority of experiments investigating 1D-1D Coulomb drag have been conducted in a lateral geometry, characterized by a substantial interwire separation (d 200 nm), and with a soft barrier between the wires.…”

Section: The Coupled Quantum Wire Modelmentioning

confidence: 99%

On some structural phase transitions in coupled quantum wires at finite temperature

Rani,

Kaur,

Garg

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

In this paper, we explore some structural phase transitions in \textit{GaAs}-based coupled electron-electron ({\it e-e}) and electron-hole ({\it e-h}) quantum wires at finite temperature. To this endeavour, the intra- and inter-wire static-structure factors, pair-correlation functions and static (charge) density susceptibilities are calculated over a wide range of temperature $T$, particle number density parameter $r_{se}$ and some selected values of inter-wire spacing $d$. The particle exchange-correlations (xc) are included using the dynamic version of self-consistent mean-field theory of Singwi {\it et al} (the qSTLS theory), and the results have been compared with the static STLS model.It has been found that in the {\it e-h} system, the inclusion of dynamic nature of xc leads to the formation of Wigner crystal (WC) state in the close proximity of two wires at wave-vector $q\sim 3.5k_{Fe}$. However, a charge-density-wave (CDW) instability is observed at $q\sim 2k_{Fe}$ when the xc are treated statically ($k_{Fe}$ being the electron's Fermi wave vector). On the other hand, the {\it e-e} system shows comparatively small signatures of the WC phase when wires are kept sufficiently far apart, but, a long-wavelength instability is encountered in close vicinity of the wires. Interestingly, the CDW phase is completely missing in the {\it e-e} system at the investigated parameters. Expectedly, the quantum phase transitions are predicted to occur in the strongly correlated regime {\it i.e.} at sufficiently small $T$ and high $r_{se}$.

show abstract

Section: The Coupled Quantum Wire Modelmentioning

confidence: 99%

On some structural phase transitions in coupled quantum wires at finite temperature

Rani,

Kaur,

Garg

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

Dynamic Exchange‐Correlation Effects on Coulomb Drag in Coupled Nanowires

Rani,

Garg,

Moudgil

2024

Physica Status Solidi (b)

View full text Add to dashboard Cite

In this article, a study is done on the dynamic exchange‐correlation effects on Coulomb drag in coupled electron–electron (e–e) and electron–hole (e–h) nanowires fabricated on ‐based heterostructures. The drag rate is calculated over a wide range of temperature (T), particle number density parameter (), and inter‐wire separation (d) using the dynamic mean‐field theory of Hasegawa and Shimizu, known as the qSTLS theory. It is found that at a fixed T, the drag rate increases with an increase (or decrease) in (or d) and exhibits a peaked structure at sufficiently high T for both the coupled systems. The formation of peak in drag rate is explained by showing the variation of drag intensity function and dynamic local‐fields with T and . As anticipated, the drag is higher for the e–h nanowire system as compared to the e–e system due to stronger particle correlations in the former. It is asserted that the dynamics of particle correlations is crucial and more conspicuous at higher , leading to a significant reduction in drag compared to the STLS theory. Finally, the plasmon dispersion of both systems is reported and it is noted that there exist four plasma modes — two optic and two acoustic, and the energy of all modes shows a consistent blue shift with rise in T. However, as d is decreased, the uppermost optic and acoustic plasma modes seem to repel each other, while they gain in energy with an increase in in each of the coupled system.

show abstract

Nonreciprocal Coulomb drag between quantum wires in the quasi-one-dimensional regime

Cited by 2 publications

References 53 publications

On some structural phase transitions in coupled quantum wires at finite temperature

On some structural phase transitions in coupled quantum wires at finite temperature

Dynamic Exchange‐Correlation Effects on Coulomb Drag in Coupled Nanowires

Contact Info

Product

Resources

About