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| On the cover: Human civilization has been boosted by the development of chemistry, from fire-using to artificial fuels and chemicals. The advancement of chemistry brings us closer than ever to the nature of microscopic universe. Now, chemists are playing a critical role to develop green energy and intelligent materials. For a bright future of humanity, more and more breakthroughs in chemical technology are needed. |
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| Position: Home > issue > February 28, 2021 Volume 2, Issue 1 |
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| Chirality-Induced Giant Unidirectional Magnetoresistance in Twisted Bilayer Graphene |
Category: Report Download:  PDF  Figure  Endnote |
| Author: Yizhou Liu, Tobias Holder, Binghai Yan |
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Graphical Abstract
Twisted bilayer graphene (TBG) exhibits fascinating correlation-driven phenomena like the superconductivity and Mott insulating state, with flat bands and a chiral lattice structure. We find by quantum-transport calculations that the chirality leads to a giant unidirectional magnetoresistance (UMR) in TBG, where the unidirectionality refers to the resistance change under the reversal of the direction of current or magnetic field. We point out that flat bands significantly enhance this effect. The UMR increases quickly upon reducing the twist angle, and reaches about 20% for an angle of 1.5¡ã in a 10 T in-plane magnetic field.
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