TY - JOUR

T1 - Twist-angle two-dimensional superlattices and their application in (opto)electronics

AU - Xin, Kaiyao

AU - Wang, Xingang

AU - Grove-Rasmussen, Kasper

AU - Wei, Zhongming

PY - 2022

Y1 - 2022

N2 - Twist-angle two-dimensional systems, such as twisted bilayer graphene, twisted bilayer transition metal dichalcogenides, twisted bilayer phosphorene and their multilayer van der Waals heterostructures, exhibit novel and tunable properties due to the formation of Moire superlattice and modulated Moire bands. The review presents a brief venation on the development of "twistronics" and subsequent applications based on band engineering by twisting. Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree, twist-angle, to adjust (opto)electrical behaviors. Then, the merging of Dirac cones and the presence of flat bands gave rise to enhanced light-matter interaction and gate-dependent electrical phases, respectively, leading to applications in photodetectors and superconductor electronic devices. At the same time, the increasing amount of theoretical simulation on extended twisted 2D materials like TMDs and BPs called for further experimental verification. Finally, recently discovered properties in twisted bilayer h-BN evidenced h-BN could be an ideal candidate for dielectric and ferroelectric devices. Hence, both the predictions and confirmed properties imply twist-angle two-dimensional superlattice is a group of promising candidates for next-generation (opto)electronics.

AB - Twist-angle two-dimensional systems, such as twisted bilayer graphene, twisted bilayer transition metal dichalcogenides, twisted bilayer phosphorene and their multilayer van der Waals heterostructures, exhibit novel and tunable properties due to the formation of Moire superlattice and modulated Moire bands. The review presents a brief venation on the development of "twistronics" and subsequent applications based on band engineering by twisting. Theoretical predictions followed by experimental realization of magic-angle bilayer graphene ignited the flame of investigation on the new freedom degree, twist-angle, to adjust (opto)electrical behaviors. Then, the merging of Dirac cones and the presence of flat bands gave rise to enhanced light-matter interaction and gate-dependent electrical phases, respectively, leading to applications in photodetectors and superconductor electronic devices. At the same time, the increasing amount of theoretical simulation on extended twisted 2D materials like TMDs and BPs called for further experimental verification. Finally, recently discovered properties in twisted bilayer h-BN evidenced h-BN could be an ideal candidate for dielectric and ferroelectric devices. Hence, both the predictions and confirmed properties imply twist-angle two-dimensional superlattice is a group of promising candidates for next-generation (opto)electronics.

KW - twist angle

KW - Moire superlattice

KW - two-dimensional

KW - (opto)electronics

KW - FIELD-EFFECT TRANSISTORS

KW - MAGIC-ANGLE

KW - BLACK PHOSPHORUS

KW - ELECTRONIC-PROPERTIES

KW - BILAYER GRAPHENE

KW - MOIRE

KW - SUPERCONDUCTIVITY

KW - TRANSPORT

KW - BEHAVIOR

KW - STATES

U2 - 10.1088/1674-4926/43/1/011001

DO - 10.1088/1674-4926/43/1/011001

M3 - Review

VL - 43

JO - Journal of Semiconductors

JF - Journal of Semiconductors

SN - 1674-4926

IS - 1

M1 - 011001

ER -