Premium
Tunable Valley Polarization in a Multiferroic CuCrP 2 Te 6 Monolayer
Author(s) -
Ma Xikui,
Sun Lei,
Liu Jian,
Feng Xukun,
Li Weifeng,
Hu Jifan,
Zhao Mingwen
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202000008
Subject(s) - multiferroics , brillouin zone , polarization (electrochemistry) , monolayer , condensed matter physics , hall effect , materials science , spin polarization , polarization density , physics , optoelectronics , nanotechnology , chemistry , dielectric , ferroelectricity , magnetization , electrical resistivity and conductivity , magnetic field , quantum mechanics , electron
Valleytronic devices in which both the encoding and processing of information are achieved by manipulating electronic valley degrees of freedom are drawing increasing interest. However, materials with sizable intrinsic valley polarization are currently very rare. Using first‐principles calculations, a promising 2D multiferroic CuCrP 2 Te 6 monolayer with intrinsic valley and spin polarization is proposed. The valley splitting at the corners of the Brillouin zone (K and K′) with opposite Berry curvatures can be as large as 110.4 meV, which is quite promising for achieving an anomalous valley Hall effect. Moreover, such valley splitting can be tuned through different approaches, such as modulating the spin polarization and electric polarization and external strain. The interplay between valley and multiferroic properties reveled herein offers a unique strategy for the valleytronic device applications.