Canted antiferromagnetic to ferromagnetic phase transition in bilayer graphene

19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures

Pezzini, S.^1,2,4 ; Cobaleda, C.^2,5 ; Piot, B.A.^3 ; Bellani, V.^1 ; Diez, E.^2

Dipartimento di Fisica and CNISM, Universitá Degli Studi di Pavia, Pavia

I-27100, Italy^1

Laboratorio de Bajas Temperaturas, Universidad de Salamanca, Salamanca

E-37008, Spain^2

Laboratoire National des Champs Magnétiques Intenses, CNRS-UJF-UPS-INSA, Grenoble

F-38042, France^3

High Field Magnet Laboratory (HFML-EMFL), Radboud University, ED Nijmegen

6525, Netherlands^4

ASML, DR Veldhoven

5504, Netherlands^5

关键词: Antiferromagnetics;    Electrical transport measurements;    Experimental development;    Ferromagnetic phase;    Ferromagnetic Phase Transition;    Insulator-to-metal transitions;    Tilted magnetic fields;    Topological state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/647/1/012044/pdf
DOI  :  10.1088/1742-6596/647/1/012044

来源: IOP

【 摘 要 】

We performed electrical transport measurements in strong tilted magnetic fields (up to 30 T) on a high quality bilayer graphene sample. The possibility of tuning the system into a topological state at zero filling factor, associated to a ferromagnetic phase, is demonstrated on the basis of an insulator-to-metal transition and simultaneous arising of strong non-local response. Based on recent theoretical predictions, relevant aspects of the phase transition are quantitatively extracted. New experimental developments on the topics are proposed in the final section.