Probing exotic phase transitions in bilayer graphene with NEMS resonator

The recent discovery of spin-polarized superconductivity in Bernal bilayer graphene has piqued interest in exploring exotic phases beyond twisted bilayer graphene.[1] By applying a proper carrier concentration and displacement field, it is possible to increase the density of state by a large amount in Bernal bilayer graphene, leading to observations of superconductivity, isospin magnetism, and quantum cascade of correlated phases.[2] In this study, we describe our efforts to investigate these exotic phase transitions using highly sensitive nano-electromechanical devices.[3]

[1] H. Zhou et al., “Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene,” Science (1979), vol. 375, no. 6582, pp. 774–778, Feb. 2022

[2] A. M. Seiler et al., “Quantum cascade of correlated phases in trigonally warped bilayer graphene,” Nature, vol. 608, no. 7922, pp. 298–302, Aug. 2022

[3] M. Šiškins et al., “Magnetic and electronic phase transitions probed by nanomechanical resonators,” Nat Commun, vol. 11, no. 1, p. 2698, Dec. 2020