Light-Tunable Ferromagnetism in Atomically Thin 
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 Driven by Femtosecond Laser Pulse

Liu, Bo; Liu, Shanshan; Yang, Long; Chen, Zhendong; Zhang, Enze; Li, Zihan; Wu, Jing; Ruan, Xuezhong; Xiu, Faxian; Liu, Wenqing; He, Liang; Zhang, Rong; Xu, Yongbing

doi:10.1103/physrevlett.125.267205

Cited by 69 publications

(47 citation statements)

References 47 publications

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“…In current control scheme 518,557,558 , one usually aims to utilize electrical current to switch magnetization via spin orbit torque. Besides electrical control, many other stimuli have been attempted to control 2D magnetism, including pressure [559][560][561][562][563] , chemical synthesis 545 , light incidence 564 , to name a few. For example, pressure can artificially change the lattice constants of vdW magnets, chemical synthesis 545 can easily modify the elemental concentration and stoichiometry, and optical incidence can cause photo-induced doping in 2D magnets 565 , all of which could lead to the effective control of magnetic properties.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Recent Progress on Two-Dimensional Materials

Chang¹,

Chen²,

Chen³

et al. 2021

Acta Physico Chimica Sinica

295

119

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Research on two-dimensional (2D) materials has been explosively increasing in last seventeen years in varying subjects including condensed matter physics, electronic engineering, materials science, and chemistry since the mechanical exfoliation of graphene in 2004. Starting from graphene, 2D materials now have become a big family with numerous members and diverse categories. The unique structural features and physicochemical properties of 2D materials make them one class of the most appealing candidates for a wide range of potential applications.In particular, we have seen some major breakthroughs made in the field of 2D materials in last five years not only in developing novel synthetic methods and exploring new structures/properties but also in identifying innovative applications and pushing forward commercialisation. In this review, we provide a critical summary on the recent progress made in the field of 2D materials with a particular focus on last five years. After a brief background 物理化学学报 Acta Phys. -Chim. Sin. 2021, 37 (12), 2108017 (3 of 151) introduction, we first discuss the major synthetic methods for 2D materials, including the mechanical exfoliation, liquid exfoliation, vapor phase deposition, and wet-chemical synthesis as well as phase engineering of 2D materials belonging to the field of phase engineering of nanomaterials (PEN). We then introduce the superconducting/optical/magnetic properties and chirality of 2D materials along with newly emerging magic angle 2D superlattices. Following that, the promising applications of 2D materials in electronics, optoelectronics, catalysis, energy storage, solar cells, biomedicine, sensors, environments, etc. are described sequentially. Thereafter, we present the theoretic calculations and simulations of 2D materials. Finally, after concluding the current progress, we provide some personal discussions on the existing challenges and future outlooks in this rapidly developing field.

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Section: Magnetic Propertiesmentioning

confidence: 99%

Recent Progress on Two-Dimensional Materials

Chang¹,

Chen²,

Chen³

et al. 2021

Acta Physico Chimica Sinica

295

119

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“…Notably, charge transfer between Bi 2 Te 3 and FGT is unlikely responsible for the magnetism change we observe. The magnetism of FGT could only be manipulated under heavy electron doping, [ 33,45 ] which cannot be provided by Bi 2 Te 3 . More importantly, different from EuS, [ 46,47 ] RuCl 3 , [ 48,49 ] CrI 3 [ 50 ] which are ferromagnetic insulators, the FGT belongs to 2D ferromagnetic metal, where the high carrier density makes its density of states insensitive to the transferred charges from adjacent Bi 2 Te 3 .…”

Section: Generation and Detection Of Thz Radiation In Fgt|ti Heterost...mentioning

confidence: 99%

Generation and Control of Terahertz Spin Currents in Topology‐Induced 2D Ferromagnetic Fe₃GeTe₂|Bi₂Te₃ Heterostructures

et al. 2022

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Future information technologies for low‐dissipation quantum computation, high‐speed storage, and on‐chip communication applications require the development of atomically thin, ultracompact, and ultrafast spintronic devices in which information is encoded, stored, and processed using electron spin. Exploring low‐dimensional magnetic materials, designing novel heterostructures, and generating and controlling ultrafast electron spin in 2D magnetism at room temperature, preferably in the unprecedented terahertz (THz) regime, is in high demand. Using THz emission spectroscopy driven by femtosecond laser pulses, optical THz spin‐current bursts at room temperature in the 2D van der Waals ferromagnetic Fe3GeTe2 (FGT) integrated with Bi2Te3 as a topological insulator are successfully realized. The symmetry of the THz radiation is effectively controlled by the optical pumping incidence and external magnetic field directions, indicating that the THz generation mechanism is the inverse Edelstein effect contributed spin‐to‐charge conversion. Thickness‐, temperature‐, and structure‐dependent nontrivial THz transients reveal that topology‐enhanced interlayer exchange coupling increases the FGT Curie temperature to room temperature, which provides an effective approach for engineering THz spin‐current pulses. These results contribute to the goal of all‐optical generation, manipulation, and detection of ultrafast THz spin currents in room‐temperature 2D magnetism, accelerating the development of atomically thin high‐speed spintronic devices.

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“…Such a high carrier density is experimentally realizable in the 2D materials through electrostatic gating [72,73] or femtosecond laser pulse. [74] In contrast, the electron doping has a detrimental effect on the ordering as T C gradually decreases. We notice that below a critical carrier density, the magnetism remains out-of-plane and beyond which it switches to the in-plane orientation as A z changes sign.…”

Section: Discussionmentioning

confidence: 99%

Long-range anisotropic Heisenberg ferromagnets and electrically tunable ordering

Singh,

Kabir

2021

Preprint

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Recent realizations of intrinsic magnetic order in truly two-dimensional materials have opened new avenues in the fundamental knowledge and spintronic applications. Here we develop an anisotropic Heisenberg model with relativistic exchange interactions that are obtained from the first-principles calculations. We demonstrate the crucial importance of magnetic interactions beyond the firstneighbour to qualitatively and quantitatively reproduce the experimental results. Once we ascertain the predictive capacity of the model for chromium trihalides and CrGeTe3, we investigate the feasibility of tuning the magnetic ordering by electrical means in these materials. A remarkable five-fold increase in the ferromagnetic Curie temperature is predicted in monolayer CrI3 within experimentally obtainable hole density. The elusive microscopic mechanism behind the doping-dependent Curie temperature is illustrated. Further, in the present context, the effects of biaxial strain and chemical doping are also addressed. The results should trigger further experimental attention to test the present conclusions.

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Light-Tunable Ferromagnetism in Atomically Thin Fe3GeTe2 Driven by Femtosecond Laser Pulse

Cited by 69 publications

References 47 publications

Recent Progress on Two-Dimensional Materials

Recent Progress on Two-Dimensional Materials

Generation and Control of Terahertz Spin Currents in Topology‐Induced 2D Ferromagnetic Fe₃GeTe₂|Bi₂Te₃ Heterostructures

Long-range anisotropic Heisenberg ferromagnets and electrically tunable ordering

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Light-Tunable Ferromagnetism in Atomically Thin Fe3GeTe2 Driven by Femtosecond Laser Pulse

Cited by 69 publications

References 47 publications

Recent Progress on Two-Dimensional Materials

Recent Progress on Two-Dimensional Materials

Generation and Control of Terahertz Spin Currents in Topology‐Induced 2D Ferromagnetic Fe3GeTe2|Bi2Te3 Heterostructures

Long-range anisotropic Heisenberg ferromagnets and electrically tunable ordering

Contact Info

Product

Resources

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Generation and Control of Terahertz Spin Currents in Topology‐Induced 2D Ferromagnetic Fe₃GeTe₂|Bi₂Te₃ Heterostructures