Tunable chiral anomalies and coherent transport on a honeycomb lattice

TL;DR

This paper theoretically demonstrates that dissipationless transport can be achieved on a honeycomb lattice through tunable chiral anomalies induced by an electric field, offering a new pathway for energy-efficient electronic materials.

Contribution

It introduces a method to realize dissipationless transport on a honeycomb lattice via electric-field-tunable chiral anomalies without magnetic fields, expanding the design space for energy-efficient materials.

Findings

Dissipationless bulk transport enabled by chiral anomalies.

Transition to a cubic-like dispersion phase with increased electric field.

Potential for strongly correlated localization and exotic dispersion phenomena.

Abstract

The search for energy efficient materials is urged not only by the needs of modern electronics but also by emerging applications in neuromorphic computing and artificial intelligence. Currently, there exist two mechanisms for achieving dissipationless transport: superconductivity and the quantum Hall effect. Here we reveal that dissipationless transport is theoretically achievable on a honeycomb lattice by rational design of chiral anomalies tunable without any magnetic fields. Breaking the usual assumption of commensurability and applying an external electric field lead to electronic modes exhibiting chiral anomalies capable of dissipationless transport in the material bulk, rather than on the edge. As the electric field increases, the system reaches a cubic-like dispersion material phase. While providing performance comparable to other known honeycomb lattice-based ballistic conductors such as an armchair nanotube, zigzag nanoribbon and hypothetical cumulenic carbyne, this scheme provides routes to a strongly correlated localization due to flat band dispersion and to exotic cubic dispersion material featuring a pitchfork bifurcation and a critical slowing down phenomena. These results open a new research avenue for the design of energy efficient information processing and higher-order dispersion materials.