Magnon Interference Tunneling Spectroscopy as a Probe of 2D Magnetism

Asimpunya, Mitra,; Corticelli, Alberto; Ribeiro, Pedro; McClarty, Paul A.

doi:10.1103/physrevlett.130.066701

Cited by 8 publications

(2 citation statements)

References 32 publications

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“…Two-dimensional (2D) semiconductors show great prospects for future-oriented nanophotonics applications [1][2][3][4][5][6][7]. However, conventional 2D materials, such as MoS 2 (183 cm 2 V −1 s −1 ), MoTe 2 (41 cm 2 V −1 s −1 ), Sb (50 cm 2 V −1 s −1 ), SnS 2 (5.7 cm 2 V −1 s −1 ), and GaSe (39 cm 2 V −1 s −1 ) are of intrinsic low electron mobility at room temperature, which significantly limits their applications [8].…”

Section: Introductionmentioning

confidence: 99%

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain

Zeng,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

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Two-dimensional (2D) semiconductors have shown great prospect in future-oriented optoelectronic applications, whereas the applications of conventional 2D materials are significantly impeded by the low electron mobility (≤ 200 cm2V1s1). In this work, strain mediated fluorine and hydrogen passivated 2D Ga2O3 systems (FGa2O3H) have been explored via using first-principles calculations with the Heyd-Scuseria-Ernzerh (HSE) and Perdew-Burke-Ernzerhof (PBE) functional. Our results reveal a considerable high electron mobility of FGa2O3H up to 4863.05 cm2V1s1 as the uniaxial tensile strain reaches 6%, which can be attributed to the enhanced overlapping of wave functions and bonding features. Overall, applying the uniaxial strain monotonously along a(b) direction from compressive to tensile cases, the bandgaps of 2D FGa2O3H increase initially and then decrease, which is originated from the changes of σ* anti-bonding in the CBM and π bonding states in the VBM accompanying with the lengthening Ga-O bonds. Additionally, when the tensile strain is larger than 8%, the stronger π bonding at G point leads to an indirect-to-direct transition. Besides the highest electron mobility of n-type doped 2D FGa2O3H with 6% tensile strain, the electrical conductivity is enhanced and further elevated with the temperature increase from 300K to 800K. The variations of the absorption coefficient in the ultraviolet region is negligible with the increasing tensile strain from 0% to 6%, shed light on its applications in high-power optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain

Zeng,

Wu,

et al. 2024

J. Phys. D: Appl. Phys.

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“…The recent discovery of two-dimensional van der Waals (vdW) monolayer magnetic materials has opened new avenues for scalable, defect-free samples for spintronic applications and artificial designer materials. − It provides an exciting opportunity to control and manipulate magnetism in two-dimensions − and create new emergent states in vdW heterostructures. − A common feature of two-dimensional materials is the appearance of moiré patterns due to the lattice mismatch or twist between the monolayer and the substrate. Using the twist degree of freedom has emerged as a powerful strategy to design new quantum states. − Paradigmatic examples are the emergent correlated and topological states in graphene moiré multilayers, , ferroelectricity in hexagonal boron nitride moiré bilayers, moiré excitons in twisted MoSe 2 /WSe 2 , and moiré magnetism in CrI 3 moiré bilayers .…”

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confidence: 99%

Visualization of Moiré Magnons in Monolayer Ferromagnet

et al. 2023

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Two-dimensional magnetic materials provide an ideal platform to explore collective many-body excitations associated with spin fluctuations. In particular, it should be feasible to explore, manipulate, and ultimately design magnonic excitations in two-dimensional van der Waals magnets in a controllable way. Here we demonstrate the emergence of moiré magnon excitations, stemming from the interplay of spin-excitations in monolayer CrBr3 and the moiré pattern arising from the lattice mismatch with the underlying substrate. The existence of moiré magnons is further confirmed via inelastic quasiparticle interference, showing the appearance of a dispersion pattern correlated with the moiré length scale. Our results provide a direct visualization in real-space of the dispersion of moiré magnons, demonstrating the versatility of moiré patterns in creating emergent many-body excitations.

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Role of topology in compensated magnetic systems

Reichlova,

Kriegner,

Mook

et al. 2024

APL Materials

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Topology plays a crucial and multifaceted role in solid state physics, leading to a remarkable array of newly investigated materials and phenomena. In this Perspective, we provide a brief summary of well-established model materials with a particular focus on compensated magnets and highlight key phenomena that emerge due to the influence of topology in these systems. The overview covers various magneto-transport phenomena, with a particular focus on the extensively investigated anomalous magneto-transport effects. Furthermore, we look into the significance of topology in understanding elementary magnetic excitations, namely magnons, where the role of topology gained considerable attention from both theoretical and experimental perspectives. Since electrons and magnons carry energy, we explore the implications of topology in combined heat and spin transport experiments in compensated magnetic systems. At the end of each section, we highlight intriguing unanswered questions in this research direction. To finally conclude, we offer our perspective on what could be the next advancements regarding the interaction between compensated magnetism and topology.

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Magnon Interference Tunneling Spectroscopy as a Probe of 2D Magnetism

Cited by 8 publications

References 32 publications

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain

Visualization of Moiré Magnons in Monolayer Ferromagnet

Role of topology in compensated magnetic systems

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Magnon Interference Tunneling Spectroscopy as a Probe of 2D Magnetism

Cited by 8 publications

References 32 publications

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga2O3 by uniaxial strain

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga2O3 by uniaxial strain

Visualization of Moiré Magnons in Monolayer Ferromagnet

Role of topology in compensated magnetic systems

Contact Info

Product

Resources

About

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain

Tunable electronic, transport, and optical properties of fluorine- and hydrogen-passivated two-dimensional Ga₂O₃ by uniaxial strain