Tunable correlated Chern insulator and ferromagnetism in a moiré superlattice

Nature, Published online: 04 March 2020; doi:10.1038/s41586-020-2049-7A topological Chern insulating state is reported to emerge from strong correlations in flat moiré bands in a graphene superlattice and by applying a vertical electric field the Chern number is switched.

Source: Nature AOP - March 3, 2020 Category: Research Authors: Guorui Chen Aaron L. Sharpe Eli J. Fox Ya-Hui Zhang Shaoxin Wang Lili Jiang Bosai Lyu Hongyuan Li Kenji Watanabe Takashi Taniguchi Zhiwen Shi T. Senthil David Goldhaber-Gordon Yuanbo Zhang Feng Wang Source Type: research