Dresden 2020 – scientific programme

The DPG Spring Meeting in Dresden had to be cancelled! Read more ...

Parts | Days | Selection | Search | Updates | Downloads | Help

DY: Fachverband Dynamik und Statistische Physik

DY 10: Graphene (jointly with DY, MA, HL, DS, O) (joint session TT/DY/HL)

DY 10.5: Talk

Monday, March 16, 2020, 16:00–16:15, HSZ 201

Zero-magnetic-field Hall effects in artificially corrugated bilayer graphene — •Sheng-Chin Ho¹, Ching-Hao Chang^1,2, Yu-Chiang Heish¹, Shun-Tsung Lo¹, Botsz Huang¹, Carmine Ortix^3,4, and Tse-Ming Chen^1,2 — ¹Department of Physics, National Cheng Kung University, Tainan, Taiwan — ²Center for Quantum Frontiers of Research & Technology (QFort), National Cheng Kung University, 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 di Salerno, IT-84084 Fisciano, Italy

We propose a new scheme that uses a lithographically-defined strain technology to modify the interlayer coupling and intralayer interaction of bilayer graphene (BLG). In this deformed BLG system, we demonstrate an unusual pseudo-magnetoresistance anisotropy and the so-called nonlinear Hall effect. These observations are the consequence of the Fermi surface anisotropy and tilted mini-Dirac cones, which originate from the non-zero first-order moments of the pseudo-magnetic field in both real- and momentum-spaces, i.e., the pseudo-magnetic field dipole and Berry curvature dipole. This new approach enables us to turn a simple bilayer graphene into an exotic phase of matter with nontrivial band dispersion generated by the strain engineering, on par with the creation of metamaterials or state-of-art twistronics engineering.