Gate-Tunable Resonances and 1D Channel in a Graphene Nanoslide

TL;DR

This paper develops a theoretical model of a graphene nanoslide device that exhibits tunable resonances, one-dimensional channels, and controllable electronic phases via gate voltage, relevant for graphene straintronics.

Contribution

It introduces a closed-form scattering solution for the nanoslide, revealing tunable pseudogauge and electrostatic cavities and 1D channels with adjustable properties.

Findings

Nanoslide hosts hybrid pseudogauge and electrostatic cavities.

Gate voltage controls valley-chiral or counterpropagating modes.

Electron-electron interactions enable in-situ tuning of Luttinger liquid phases.

Abstract

We present a theory of the graphene nanoslide, a fundamental device for graphene straintronics that realizes a single pseudogauge barrier. We solve the scattering problem in closed form and demonstrate that the nanoslide gives rise to a hybrid pseudogauge and electrostatic cavity in the bipolar regime, and hosts one-dimensional transverse channels. The latter can be tuned using a bottom gate between valley-chiral or counterpropagating modes, as well as one-dimensional flatbands. Hence, the local density of states near the barrier depends strongly on the gate voltage with a tunable sublattice and electron-hole asymmetry. In the presence of electron-electron interactions, the nanoslide allows for \textit{in-situ} tuning between a chiral and ordinary Tomonaga-Luttinger liquid.