A magnetically-induced Coulomb gap in graphene due to electron-electron interactions

E. E. Vdovin, Mark Greenaway, Yu N. Khanin, Sergey Morozov, Oleg Makarovsky, Amalia Patané, Artem Mishchenko, Sergey Slizovskiy, Vladimir Fal'ko, Andre Geim, Kostya S Novoselov, Laurence Eaves

Research output: Contribution to journalArticlepeer-review


Insights into the fundamental properties of graphene’s Dirac-Weyl fermions have emerged from studies of electron tunnelling transistors in which an atomically thin layer of hexagonal boron nitride (hBN) is sandwiched between two layers of high purity graphene. Here, we show that when a single defect is present within the hBN tunnel barrier, it can inject electrons into the graphene layers and its sharply defined energy level acts as a high resolution spectroscopic probe of electron-electron interactions in graphene. We report a magnetic field dependent suppression of the tunnel current flowing through a single defect below temperatures of ~2 K. This is attributed to the formation of a magnetically-induced Coulomb gap in the spectral density of electrons tunnelling into graphene due to electron-electron interactions.
Original languageEnglish
Article number159
JournalCommunications physics
Early online date30 Jun 2023
Publication statusE-pub ahead of print - 30 Jun 2023


Dive into the research topics of 'A magnetically-induced Coulomb gap in graphene due to electron-electron interactions'. Together they form a unique fingerprint.

Cite this