Longitudinal and transverse frictional drag in graphene/
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 heterostructures

Guo, Qing; Li, Jianan; Lee, Hyungwoo; Lee, Jungwoo; Tang, Yuchen; Yu, Muqing; Hu, Yang; Eom, Chang‐Beom; Irvin, Patrick; Levy, Jeremy

doi:10.1103/physrevb.106.045303

Cited by 3 publications

(1 citation statement)

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“…However, subsequent theoretical advances [29][30][31][32][33] have highlighted that, in mesoscopic structures, alternate drag-inducing mechanisms involving rectification of charge fluctuations could explicitly break Onsager's relations. Recent observations consistent with these novel theories have been reported in quantum dots [34], in nanowires coupled to graphene [35] as well as in superconducting [36,37] and topological wires [38]. Understanding the material and parametric considerations behind the onset of this alternate draginducing mechanism is crucial for future developments in the field of coupled 1D systems.…”

Section: Introductionmentioning

confidence: 60%

Coulomb drag between quantum wires in the quasi-1D regime.

Makaju¹,

Kassar²,

Addamane³

et al. 2021

Proposed for Presentation at the APS March Meeting 2021 Held March 15-19, 2021 in Online.

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Coulomb drag experiments have been an essential tool to study strongly interacting lowdimensional systems. Historically, this effect has been explained in terms of momentum transfer between electrons in the active and the passive layer. Here, we report Coulomb drag measurements between laterally coupled GaAs/AlGaAs quantum wires in the multiple 1D sub-band regime that break Onsager's reciprocity upon both layer and current direction reversal, in contrast to prior 1D Coulomb drag results. The drag signal shows nonlinear I-V characteristics, which are well characterized by a third-order polynomial fit. These findings are qualitatively consistent with a rectified drag signal induced by charge fluctuations. However, the nonmonotonic temperature dependence of this drag signal suggests that strong electron-electron interactions, expected within the Tomonaga-Luttinger liquid framework, remain important and standard interaction models are insufficient to capture the qualitative nature of rectified 1D Coulomb drag.

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