# Persistent current distributions along a p-n junction in graphene in a magnetic field

Source: [Persistent current distributions along a p-n junction in graphene in a magnetic field](<https://www.sota2.com/research/paper/68fa48631e209131ce92f43d>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T06:48:35.228Z

Authors: K. Shizuya

Published: 2024-11-02T21:49:57.000Z

## Abstract

A p-n junction, induced in graphene by gating, works to contrast the edge states of electrons and holes on each side of it. In a magnetic field those edge states carry two species of persistent current, which are intimately tied to the edge-mode spectra. We study how those persistent currents change along each side of the junction as the Fermi level is varied, with special emphasis on the electron-hole conjugation property of the Dirac electrons. A close look is made into the electromagnetic response of the valence band filled with negative-energy electrons, or the Dirac sea, which as a whole turns out to be electrically inactive while showing intrinsic orbital diamagnetism. Recently, in experiment, it became possible to observe local currents in planar samples by use of a nanoscale magnetometer. The p-n junctions in graphene and related atomic layers, via detection of associated microscopic currents, will be a useful platform for exploring many-body quantum phenomena.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2411.01367>)

[PDF](<https://arxiv.org/pdf/2411.01367.pdf>)