The family of 2D and layered materials has been expanding rapidly for more than a decade.
Within this large family of hundreds of materials, black phosphorus and its isoelectronic …

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We show that the Wannier obstruction and the fragile topology of the nearly flat bands in
twisted bilayer graphene at magic angle are manifestations of the nontrivial topology of two …

In this work, we perform a first-principle study to investigate the atomic and electronic
structures of the C 3 N 4/MoSi 2 N 4 van der Waals heterostructure (vdWH) as well as its …

Thin-film black phosphorus (BP) is an attractive material for mid-infrared optoelectronic
applications because of its layered nature and a moderate bandgap of around 300 meV …

Valleytronics has become an emerging field for both theoretical and experimental research.
Based on first-principles calculations, we demonstrate that the spin valley coupling and …

Semiconductor devices rely on the charge and spin of electrons, but there is another
electronic degree of freedom called pseudospin in a two-level quantum system such as a …

The extensive burning of fossil fuels has caused energy shortages and worsened the
greenhouse effect, posing a significant threat to human survival and development. The use …

Black phosphorus (BP), an elemental semiconductor, has attracted tremendous interest
because it exhibits a wealth of interesting electronic and optoelectronic properties in …

Symmetry breaking plays an important role in the fields of physics, ranging from particle
physics to condensed matter physics. In solid-state materials, phase transitions are deeply …