Enhancing and Controlling Valley Magnetic Response in MoS/WS Heterostructures by All-optical Route

Overview

Journal Nat Commun

Specialty Biology

Date 2019 Sep 19

PMID 31530805

Citations 4

Authors

Jing Zhang

Luojun Du

Shun Feng

Run-Wu Zhang

Bingchen Cao

Chenji Zou

Yu Chen

Mengzhou Liao

Baile Zhang

Shengyuan A Yang

Guangyu Zhang

Ting Yu

Affiliations

Soon will be listed here.

Abstract

Van der Waals heterostructures of transition metal dichalcogenides with interlayer coupling offer an exotic platform to realize fascinating phenomena. Due to the type II band alignment of these heterostructures, electrons and holes are separated into different layers. The localized electrons induced doping in one layer, in principle, would lift the Fermi level to cross the spin-polarized upper conduction band and lead to strong manipulation of valley magnetic response. Here, we report the significantly enhanced valley Zeeman splitting and magnetic tuning of polarization for the direct optical transition of MoS in MoS/WS heterostructures. Such strong enhancement of valley magnetic response in MoS stems from the change of the spin-valley degeneracy from 2 to 4 and strong many-body Coulomb interactions induced by ultrafast charge transfer. Moreover, the magnetic splitting can be tuned monotonically by laser power, providing an effective all-optical route towards engineering and manipulating of valleytronic devices and quantum-computation.

Citing Articles

High-Order Harmonics Generation in MoS Transition Metal Dichalcogenides: Effect of Nickel and Carbon Nanotube Dopants.

Venkatesh M, Kim V, Boltaev G, Konda S, Svedlindh P, Li W Int J Mol Sci. 2023; 24(7).

PMID: 37047513 PMC: 10094757. DOI: 10.3390/ijms24076540.

Anomalously polarised emission from a MoS/WS heterostructure.

Mol P, Barman P, Sarma P, Kumar A, Sahu S, Shaijumon M Nanoscale Adv. 2022; 3(19):5676-5682.

PMID: 36133269 PMC: 9417150. DOI: 10.1039/d1na00462j.

Emergent Multifunctional Magnetic Proximity in van der Waals Layered Heterostructures.

Choi E, Sim K, Burch K, Lee Y Adv Sci (Weinh). 2022; 9(21):e2200186.

PMID: 35596612 PMC: 9313546. DOI: 10.1002/advs.202200186.

Room temperature near unity spin polarization in 2D Van der Waals heterostructures.

Zhang D, Liu Y, He M, Zhang A, Chen S, Tong Q Nat Commun. 2020; 11(1):4442.

PMID: 32895376 PMC: 7477097. DOI: 10.1038/s41467-020-18307-w.

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