Mixing of moiré-surface and bulk states in graphite.
Mixing of moiré-surface and bulk states in graphite.
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DOI：
10.1038/s41586-023-06264-5
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发表时间：
2023-08
期刊：
影响因子：
64.8
通讯作者：
Mishchenko, Artem
中科院分区：
文献类型：
--
作者：
Mullan, Ciaran;Slizovskiy, Sergey;Yin, Jun;Wang, Ziwei;Yang, Qian;Xu, Shuigang;Yang, Yaping;Piot, Benjamin A. A.;Hu, Sheng;Taniguchi, Takashi;Watanabe, Kenji;Novoselov, Kostya S. S.;Geim, A. K.;Falko, Vladimir I. I.;Mishchenko, Artem
范德瓦尔斯组件能够设计二维(2D)材料的电子态，通常是通过使用莫尔超晶格在晶格上叠加长波长周期势来实现的。这种扭曲电子学方法已经导致了许多以前未被描述的物理，包括扭曲的双层石墨烯中的强关联和超导，过渡金属硫化物Moiré结构中的共振激子，电荷有序和Wigner结晶，以及石墨烯超晶格中的Hofstadter蝴蝶光谱和Brown-Zak量子振荡。此外，扭转电子学已被用来修正范德华晶体界面的近表面态。在这里，我们展示了三维(3D)晶体中的电子态可以通过与另一种晶体--即结晶学上取向的六方氮化硼--的界面上产生的超晶格电势来调节。这种排列导致了几个Lifshitz转变和从近表面态产生的Brown-Zak振荡，而在高磁场下，Hofstadter蝴蝶的分形态深深地吸引着石墨的主体。我们的工作展示了一种使用2D双声子方法来控制3D光谱的方法。三维晶体(如石墨)中的电子态可以通过在与结晶学上定向的六方氮化硼的界面上产生的超晶格电势来调节。
Van der Waals assembly enables the design of electronic states in two-dimensional (2D) materials, often by superimposing a long-wavelength periodic potential on a crystal lattice using moiré superlattices. This twistronics approach has resulted in numerous previously undescribed physics, including strong correlations and superconductivity in twisted bilayer graphene, resonant excitons, charge ordering and Wigner crystallization in transition-metal chalcogenide moiré structures and Hofstadter’s butterfly spectra and Brown–Zak quantum oscillations in graphene superlattices. Moreover, twistronics has been used to modify near-surface states at the interface between van der Waals crystals. Here we show that electronic states in three-dimensional (3D) crystals such as graphite can be tuned by a superlattice potential occurring at the interface with another crystal—namely, crystallographically aligned hexagonal boron nitride. This alignment results in several Lifshitz transitions and Brown–Zak oscillations arising from near-surface states, whereas, in high magnetic fields, fractal states of Hofstadter’s butterfly draw deep into the bulk of graphite. Our work shows a way in which 3D spectra can be controlled using the approach of 2D twistronics. The electronic states in three-dimensional crystals such as graphite can be tuned by a superlattice potential occurring at the interface with crystallographically aligned hexagonal boron nitride.
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影响因子：
3.7
作者：
Alexandradinata, A.;Glazman, Leonid
通讯作者：
Glazman, Leonid
影响因子：
--
作者：
DAVIS, LC;LIU, SH
通讯作者：
LIU, SH
DOI：
10.1073/pnas.1804572115
发表时间：
2018-05-15
影响因子：
11.1
作者：
Kumar, R. Krishna;Mishchenko, A.;Geim, A. K.
通讯作者：
Geim, A. K.
影响因子：
56.9
作者：
Lee, Menyoung;Wallbank, John K.;Goldhaber-Gordon, David
通讯作者：
Goldhaber-Gordon, David
影响因子：
8.6
作者：
COHEN, MH;FALICOV, LM
通讯作者：
FALICOV, LM