Magnetoconductance Oscillations in Electron-hole Hybridization Gaps and Valley Splittings in Tetralayer Graphene

Autor:	Klanurak, Illias, Watanabe, Kenji, Taniguchi, Takashi, Chatraphorn, Sojiphong, Taychatanapat, Thiti
Rok vydání:	2022
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. B 106, L161405 (2022)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.106.L161405
Popis:	We investigate magnetotransport on Bernal-stacked tetralayer graphene whose band structure consists of two massive subbands with different effective masses. Under a finite displacement field, we observe valley splitting of Landau levels (LLs) only in the light-mass subband, consistent with a tight-binding model. At low density, we find unexpected magnetoconductance oscillations in bulk gaps which originate from a series of hybridizations between electron-like and hole-like LLs due to band inversion in tetralayer graphene. In contrast to a trivial LL quantization gap, these inverted hybridization gaps can lead to a change in number of edge states which explains the observed oscillations. Comment: Accepted for publication in PRB
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2209.14574 Zobrazit plný text záznamu View this record from Arxiv