Dresden 2020 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 21: Transport - Ions and Electrons
MM 21.3: Vortrag
Dienstag, 17. März 2020, 10:45–11:00, IFW B
Curve graphene systems to create new Hall-like effects in zero magnetic field — •Ching-Hao Chang1,2, Sheng-Chin Ho1, Yu-Chiang Hsieh1, Shun-Tsung Lo1, Botsz Huang1, Thi-Hai-Yen Vu1, Carmine Ortix3,4, and Tse-Ming Chen1,2 — 1Department of Physics, National Cheng Kung University, Tainan 701, Taiwan — 2Center for Quantum Frontiers of Research & Technology (QFort), National Cheng Kung Univer- sity, Tainan 701, Taiwan — 3Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, NL-3584 CC Utrecht, Netherlands — 4Dipartimento di Fisica E. R. Caianiello, Universita Salerno, IT-84084 Fisciano, Italy
In this talk, I will show that Hall-like effects can be created in graphene systems by using curved geometry instead of applying an external magnetic field. We theoretically establish that non-trivial band structure with valley-orbital splitting can be designed in a bilayer graphene (BLG) by corrugating it. This band structure finally generates the transverse resistivity in both linear response and nonlinear response regimes. Our theoretical calculations well address experimental observations qualitatively and quantitatively. This new approach based on tailoring 2D-material geometry opens a new platform to design the band structure to host new transport properties.