Magnetooptics of layered two-dimensional semiconductors and heterostructures: progress and prospects

Abstract

Beginning with the 'conventional' two-dimensional (2D) quantum wells (QWs) based on III-V and II-VI semiconductors in the 1970s, to the recent atomically-thin sheets of van der Waals materials such as 2D semiconducting transition metal dichalcogenides (TMDCs) and 2D magnets, the research in 2D materials is continuously evolving and providing new challenges. Magnetooptical spectroscopy has played a significant role in this area of research, both from fundamental physics and technological perspectives. A major challenge in 2D semiconductors such as TMDCs is to understand their spin-valley-resolved physics, and their implications in quantum computation and information research. Since the discovery of valley Zeeman effects, deep insights into the spin-valley physics of TMDCs and their heterostructures has emerged through magnetooptical spectroscopy. In this perspective, we highlight the role of magnetooptics in many milestones such as the discovery of interlayer excitons, phase control between coherently-excited valleys, determination of exciton-reduced masses, Bohr radii and binding energies, physics of the optically-bright and dark excitons, trions, other many-body species such as biexcitons and their phonon replicas in TMDC monolayers. The discussion accompanies open questions, challenges and future prospects in the field including comments on the magnetooptics of van der Waals heterostructures involving TMDCs and 2D magnets.

arXiv comment24 pages, 19 figures, 301 references

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Cited by in corpus (15)

• Highly Tunable Ground and Excited State Excitonic Dipoles in Multilayer 2H-MoSe${}_2$
• Substrate influence on transition metal dichalcogenide monolayer exciton absorption linewidth broadening
• Interlayer exciton valley polarization dynamics in large magnetic fields
• Tunable magneto-optical properties in MoS${}_2$ via defect-induced exciton transitions
• Nano-optics of transition metal dichalcogenides and their van der Waals heterostructures with electron spectroscopies
• High-performance broadband Faraday rotation spectroscopy of 2D materials and thin magnetic films
• Tensile strain induced brightening of momentum forbidden dark exciton in WS${}_2$
• Retrieval of material properties of monolayer transition-metal dichalcogenides from magnetoexciton energy spectra
• Dynamic Valley Polarization in Moire Quantum Dots
• Rydberg excitons and polaritons in monolayer transition metal dichalcogenides in a magnetic field
• Engineering Purcell factor anisotropy for dark and bright excitons in two dimensional semiconductors
• Spin relaxation of localized electrons in monolayer MoSe${}_2$: importance of random effective magnetic fields
• Interplay between local moment and itinerant magnetism in the layered metallic antiferromagnet TaFe${}_{1.14}$Te${}_3$
• Analytical exciton energies in monolayer transition-metal dichalcogenides
• Pump-driven opto-magnetic properties in semiconducting transition-metal dichalcogenides: an analytical model