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Discovery of intrinsic ferromagnetism in two-dimensional van der Waals crystals

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TLDR
In this paper, the authors reported the experimental discovery of intrinsic ferromagnetism in Cr 2 Ge 2 Te 6 atomic layers by scanning magneto-optic Kerr microscopy.
Abstract
We report the experimental discovery of intrinsic ferromagnetism in Cr 2 Ge 2 Te 6 atomic layers by scanning magneto-optic Kerr microscopy. In this 2D van der Waals ferromagnet, unprecedented control of transition temperature is realized via small magnetic fields.

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Two-Dimensional Multiferroic Semiconductors with Coexisting Ferroelectricity and Ferromagnetism

TL;DR: Using first-principles density functional theory, this paper showed that ferromagnetism and ferroelectricity can coexist in monolayer transition metal phosphorus chalcogenides (TMPCs) -CuMP$_2$X$_6$ (M=Cr, V; X=S, Se).
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Magnetic and Electrocatalytic Properties of Transition Metal Doped MoS 2 Nanocrystals

TL;DR: In this article, the magnetic and electrocatalytic properties of 2D transition metal doped 2H-MoS2 nanocrystals with a particle size 25-30nm are reported.
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Giant enhancement of perpendicular magnetic anisotropy and induced quantum anomalous Hall effect in graphene/ NiI 2 heterostructures via tuning the van der Waals interlayer distance

TL;DR: In this paper, the authors showed that the magnetic anisotropy of two-dimensional ferromagnetic materials can be improved by decreasing the interlayer distance of the substrate of the monolayer.
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Two-dimensional ferromagnetism in few-layer van der Waals crystals: Renormalized spin-wave theory and calculations

TL;DR: In this paper, a renormalized spin-wave theory was used to study the ferromagnetic behavior in Heisenberg-type 2D ferromagnets, and applied to few-layer Cr2Ge2Te6 crystals.
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Physical origin of giant excitonic and magneto-optical responses in two-dimensional ferromagnetic insulators

TL;DR: The authors show that the large optical and MO responses in ferromagnetic monolayer CrI3 arise from strongly bound excitons, extending over several atoms, providing physical understanding of the phenomena as well as potential design principles for engineering magneto-optical and optoelectronic devices using two-dimensional magnets.
References
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Journal ArticleDOI

The rise of graphene

TL;DR: Owing to its unusual electronic spectrum, graphene has led to the emergence of a new paradigm of 'relativistic' condensed-matter physics, where quantum relativistic phenomena can now be mimicked and tested in table-top experiments.
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QUANTUM ESPRESSO: a modular and open-source software project for quantum simulations of materials

TL;DR: QUANTUM ESPRESSO as discussed by the authors is an integrated suite of computer codes for electronic-structure calculations and materials modeling, based on density functional theory, plane waves, and pseudopotentials (norm-conserving, ultrasoft, and projector-augmented wave).
Journal ArticleDOI

Absence of Ferromagnetism or Antiferromagnetism in One- or Two-Dimensional Isotropic Heisenberg Models

TL;DR: In this paper, it is rigorously proved that at any nonzero temperature, a one- or two-dimensional isotropic spin-S$ Heisenberg model with finite-range exchange interaction can be neither ferromagnetic nor antiferromagnetic.
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Half-metallic graphene nanoribbons

TL;DR: In this article, it was shown that if in-plane homogeneous electric fields are applied across the zigzag-shaped edges of the graphene nanoribbons, their magnetic properties can be controlled by the external electric fields.
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