title: Controllable electronic and magnetic properties in a two-dimensional germanene heterostructure.
abstract: The control of spin without a magnetic field is one of the challenges in developing spintronic devices. Here, based on first-principles calculations, we predict a new kind of ferromagnetic half-metal (HM) with a Curie temperature of 244 K in a two-dimensional (2D) germanene van der Waals heterostructure (HTS). Its electronic band structures and magnetic properties can be tuned with respect to external strain and electric field. More interestingly, a transition from HM to bipolar-magnetic-semiconductor (BMS) to spin-gapless-semiconductor (SGS) in a HTS can be realized by adjusting the interlayer spacing. These findings provide a promising platform for 2D germanene materials, which hold great potential for application in nanoelectronic and spintronic devices.
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Run-Wu
authors.initials: RW
authors.lastname: Zhang
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Wei-Xiao
authors.initials: WX
authors.lastname: Ji
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Chang-Wen
authors.initials: CW
authors.lastname: Zhang
authors.affiliation: School of Physics, State Key laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, People's Republic of China.
authors.forename: Sheng-Shi
authors.initials: SS
authors.lastname: Li
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Ping
authors.initials: P
authors.lastname: Li
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Pei-Ji
authors.initials: PJ
authors.lastname: Wang
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.affiliation: School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, People's Republic of China. zhchwsd@163.com.
authors.forename: Miao-Juan
authors.initials: MJ
authors.lastname: Ren