Tailoring Dzyaloshinskii\u2013Moriya interaction in a transition metal dichalcogenide by dual-intercalation

Guolin Zheng,Nuriyah Aloufi,Min Wu,Xiangde Zhu,Sultan Albarakati,Lan Wang,Jianhui Zhou,Meri Algarni,Cheng Tan,Jie Wang,Lawrence Farrar,Maoyuan Wang,Mingliang Tian,Yugui Yao

doi:10.1038/s41467-021-23658-z

Abstract

Dzyaloshinskii–Moriya interaction (DMI) is vital to form various chiral spin textures, novel behaviors of magnons and permits their potential applications in energy-efficient spintronic devices. Here, we realize a sizable bulk DMI in a transition metal dichalcogenide (TMD) 2H-TaS2 by intercalating Fe atoms, which form the chiral supercells with broken spatial inversion symmetry and also act as the source of magnetic orderings. Using a newly developed protonic gate technology, gate-controlled protons intercalation could further change the carrier density and intensely tune DMI via the Ruderman–Kittel–Kasuya–Yosida mechanism. The resultant giant topological Hall resistivity {rho }_{{xy}}^{T} of 1.41{mathrm{mu}} Omega cdot {{mathrm{cm}}} at {V}_{g}=-5.2{mathrm{V}} (about 424 % larger than the zero-bias value) is larger than most known chiral magnets. Theoretical analysis indicates that such a large topological Hall effect originates from the two-dimensional Bloch-type chiral spin textures stabilized by DMI, while the large anomalous Hall effect comes from the gapped Dirac nodal lines by spin–orbit interaction. Dual-intercalation in 2H-TaS2 provides a model system to reveal the nature of DMI in the large family of TMDs and a promising way of gate tuning of DMI, which further enables an electrical control of the chiral spin textures and related electromagnetic phenomena.

Highlights

Dzyaloshinskii–Moriya interaction (DMI) is vital to form various chiral spin textures, novel behaviors of magnons and permits their potential applications in energy-efficient spintronic devices
The intercalation of magnetic atoms (V, Cr, Mn, Fe, Co, Ni) in transition metal dichalcogenides (TMDs) 2H-TaS2 and -NbS2 leads to various magnetic ground states (including easy axis/plane ferromagnetism (FM) and antiferromagnetism (AFM))[16,17] and novel strongly correlated states[18], providing a leading-edge field searching for DMI and potential chiral magnetic structures
DMI in itinerate intercalated TMDs is usually dominated by the Ruderman–Kittel–Kasuya–Yosida (RKKY) interaction as the FM interactions[22] and can in principle be controlled by tuning the carrier density

Summary

Introduction

Dzyaloshinskii–Moriya interaction (DMI) is vital to form various chiral spin textures, novel behaviors of magnons and permits their potential applications in energy-efficient spintronic devices. We realize a sizable bulk DMI in a transition metal dichalcogenide (TMD) 2HTaS2 by intercalating Fe atoms, which form the chiral supercells with broken spatial inversion symmetry and act as the source of magnetic orderings. Dual-intercalation in 2H-TaS2 provides a model system to reveal the nature of DMI in the large family of TMDs and a promising way of gate tuning of DMI, which further enables an electrical control of the chiral spin textures and related electromagnetic phenomena. Proton intercalation induced by electrical gating could further change the carrier density largely tune DMI via the RKKY mechanism, resulting in a huge topological Hall resistivity of 1:4μΩ Á cm at Vg 1⁄4 À5:2V. Tailoring DMI in 2H-TaS2 by dual-intercalation may reveal the universality of DMI and open up the opportunity of more investigations of chiral spin textures in a large family of TMDs

Methods

Results

Conclusion