Giant Nonvolatile Multistate Resistance with Fully Magnetically Controlled van der Waals Multiferroic Tunnel Junctions

Abstract

Ferroelectric polarization switching in electrically controlled van der Waals multiferroic tunnel junctions (vdW-MFTJs) causes atomic migration, compromising device stability and fatigue resistance. Here we propose a fully magnetically controlled vdW-MFTJ based on a \(\mathrm{CrBr_3/MnPSe_3/CrBr_3}\) vertical heterostructure, which achieves ferroelectric polarization reversal without relying on atomic migration driven by inversion symmetry breaking. Using first-principles calculations, we investigate the spin-polarized quantum transport properties of the proposed structure. By integrating asymmetric PtTe${}_2$/alkali-metal (Li/Na/K)-doped/intercalated CrBr${}_3$ electrodes, the device demonstrates exceptional performance, with a maximum tunneling magnetoresistance (TMR) exceeding $8.1\times 10^5$\% and tunneling electroresistance (TER) reaching 2499\%, while the spin-filtering channels can be flexibly controlled by the magnetization direction of the magnetic free layer, achieving perfect spin-filtering over a broad bias voltage range. Applying an external bias voltage further enhances these metrics, increasing TMR to $3.6\times 10^7$\% and TER to 9990\%. Notably, a pronounced negative differential resistance (NDR) effect is observed, yielding an unprecedented peak-to-valley ratio (PVR) of $9.55\times 10^9$\%, representing the highest value reported for vertical tunnel junctions. These extraordinary characteristics highlight the potential of vdW-MFTJs for ultra-efficient electronic switching, a key feature for next-generation spintronic devices. Our findings provide a solid theoretical foundation for designing and developing high-performance magnetic storage and logic technologies.

7 pages, 4 figures

References in corpus (13)

• Spintronics: Fundamentals and applications
• Van der Waals heterostructures
• 2D materials and van der Waals heterostructures
• Strain-tunable magnetic anisotropy in monolayer CrCl${}_3$, CrBr${}_3$, and CrI${}_3$
• Evolution of interlayer and intralayer magnetism in three atomically thin chromium trihalides
• Magnon-assisted tunnelling in van der Waals heterostructures based on CrBr3
• Spin-flop transition in atomically thin MnPS${}_3$ crystals
• Micromagnetometry of two-dimensional ferromagnets
• Van der Waals Multiferroic Tunnel Junctions
• Voltage-tunable giant nonvolatile multiple-state resistance in sliding-interlayer ferroelectric h-BN van der Waals multiferroic tunnel junction
• Giant electrode effect on tunneling magnetoresistance and electroresistance in van der Waals intrinsic multiferroic tunnel junctions using VS2
• Electrically Controllable van der Waals Antiferromagnetic Spin Valve
• Magnetic order-dependent giant tunneling magnetoresistance and electroresistance in van der Waals antiferromagnetic-multiferroic tunnel junctions

Cited by in corpus (1)

• Momentum-Resolved Tunneling Modulation Induced Giant Multistate Resistance in Antiferroelectric Multiferroic Junction