Giant electrode effect on tunneling magnetoresistance and electroresistance in van der Waals intrinsic multiferroic tunnel junctions
arxiv(2024)
摘要
Van der Waals multiferroic tunnel junctions (vdW-MFTJs) with multiple
nonvolatile resistive states are highly suitable for new physics and
next-generation storage electronics. However, currently reported vdW-MFTJs are
based on two types of materials, i.e., vdW ferromagnetic and ferroelectric
materials, forming a multiferroic system. This undoubtedly introduces
additional interfaces, increasing the complexity of experimental preparation.
Herein, we engineer vdW intrinsic MFTJs utilizing bilayer VS_2. By employing
the nonequilibrium Green's function combined with density functional theory, we
systematically investigate the influence of three types of electrodes
(including non-vdW pure metal Ag/Au, vdW metallic 1T-MoS_2/2H-PtTe_2, and
vdW ferromagnetic metallic Fe_3GaTe_2/Fe_3GeTe_2) on the electronic
transport properties of VS_2-based intrinsic MFTJs. We demonstrate that these
MFTJs manifest a giant electrode-dependent electronic transport characteristic
effect. Comprehensively comparing these electrode pairs, the
Fe_3GaTe_2/Fe_3GeTe_2 electrode combination exhibits optimal transport
properties, the maximum TMR (TER) can reach 10949% (69%) and the minimum
resistance-area product (RA) is 0.45 Ωμm^2, as well as the
perfect spin filtering and negative differential resistance effects. More
intriguingly, TMR (TER) can be further enhanced to 34000% (380%) by applying
an external bias voltage (0.1 V), while RA can be reduced to 0.16
Ωμm^2 under the influence of biaxial stress (-3%). Our proposed
concept of designing vdW-MFTJs using intrinsic multiferroic materials points
towards new avenues in experimental exploration.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要