Tunable and giant valley-selective Hall effect in gapped bilayer graphene

• Main Authors: Yin, Jianbo, Tan, Cheng, Barcons-Ruiz, David, Torre, Iacopo, Watanabe, Kenji, Taniguchi, Takashi, Song, Justin Chien Wen, Hone, James, Koppens, Frank H. L.
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics; Valley-Selective Hall Effect; Bilayer Membrane
• Online Access: https://hdl.handle.net/10356/162589
• Institution: Nanyang Technological University

Berry curvature is analogous to magnetic field but in momentum space and is commonly present in materials with nontrivial quantum geometry. It endows Bloch electrons with transverse anomalous velocities to produce Hall-like currents even in the absence of a magnetic field. We report the direct obser...