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@article{WOS:001548594700007,
title = {Milli-Tesla quantization enabled by tuneable Coulomb screening in
large-angle twisted graphene},
author = {I Babich and I Reznikov and I Begichev and A E Kazantsev and S Slizovskiy and D Baranov and M Siskins and Z Zhan and P A Pantaleon and M Trushin and J Zhao and S Grebenchuk and K S Novoselov and K Watanabe and T Taniguchi and V I Fal'ko and A Principi and A I Berdyugin},
doi = {10.1038/s41467-025-62492-5},
times_cited = {3},
year = {2025},
date = {2025-08-01},
journal = {NATURE COMMUNICATIONS},
volume = {16},
number = {1},
publisher = {NATURE PORTFOLIO},
address = {HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY},
abstract = {The electronic quality of graphene has improved significantly over the
past two decades, revealing novel phenomena. However, even
state-of-the-art devices exhibit substantial spatial charge fluctuations
originating from charged defects inside the encapsulating crystals,
limiting their performance. Here, we overcome this issue by assembling
devices in which graphene is encapsulated by other graphene layers while
remaining electronically decoupled from them via a large twist angle
(similar to 10-30 degrees). Doping of the encapsulating graphene layer
introduces strong Coulomb screening, maximized by the sub-nanometer
distance between the layers, and reduces the inhomogeneity in the
adjacent layer to just a few carriers per square micrometre. The
enhanced quality manifests in Landau quantization emerging at magnetic
fields as low as similar to 5 milli-Tesla and enables resolution of a
small energy gap at the Dirac point. Our encapsulation approach can be
extended to other two-dimensional systems, enabling further exploration
of the electronic properties of ultrapure devices.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}