Ordre et desordre de repartition des cations metalliques dans le nouveau systeme ; comportement verre de spin

LeBlanc, Annie; Ouili, Z.; Colombet, P.

doi:10.1016/0025-5408(85)90078-9

Materials Research Bulletin

1985

DOI: 10.1016/0025-5408(85)90078-9

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Ordre et desordre de repartition des cations metalliques dans le nouveau systeme ; comportement verre de spin

Annie LeBlanc

Z. Ouili

P. Colombet

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Cited by 6 publications

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“…For example, besides the traditional X elements in M I M III P 2 X 6 , we can make the doping in the M I position as compound Ag 0.1 Cu 0.9 InP 2 S 6 or M III position as compounds Ag 1/2 Cr (1/2Àx) In x PS 3 . 18,19 This would greatly improve the functionality of 2D materials with additional properties, including tunable bandgap, magnetism, and ferroelectricity in the MPTs. 20,21 Furthermore, the crystal structure and symmetry may be different among MPTs in both the bulk and monolayer form.…”

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confidence: 99%

Second-harmonic generation in quaternary atomically thin layered AgInP2S6 crystals

Wang

Liu

et al. 2016

Applied Physics Letters

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Nonlinear effects in two-dimensional (2D) atomic layered materials have attracted increasing interest. Here, we report the observation of optical second-harmonic generation (SHG) in two-dimensional atomically thin silver indium phosphorus sulfide (AgInP2S6) crystals, with odd layer thickness. The nonlinear signal facilitates the use of thickness-dependent SHG intensity to investigate the stacking type of this material, while the crystal-orientation dependent SHG intensity of the monolayer sample reveals the rotational symmetry of the AgInP2S6 lattice in plane. Our studies expand the 2D crystal family in nonlinear effect field, which opened considerable promise to the functionalities and potential applications of 2D materials.

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confidence: 99%

Second-harmonic generation in quaternary atomically thin layered AgInP2S6 crystals

Wang

Liu

et al. 2016

Applied Physics Letters

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Metal Thio‐ and Selenophosphates as Multifunctional van der Waals Layered Materials

et al. 2017

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Since the discovery of Dirac physics in graphene, research in 2D materials has exploded with the aim of finding new materials and harnessing their unique and tunable electronic and optical properties. The follow-on work on 2D dielectrics and semiconductors has led to the emergence and development of hexagonal boron nitride, black phosphorus, and transition metal disulfides. However, the spectrum of good insulating materials is still very narrow. Likewise, 2D materials exhibiting correlated phenomena such as superconductivity, magnetism, and ferroelectricity have yet to be developed or discovered. These properties will significantly enrich the spectrum of functional 2D materials, particularly in the case of high phase-transition temperatures. They will also advance a fascinating fundamental frontier of size and proximity effects on correlated ground states. Here, a broad family of layered metal thio(seleno)phosphate materials that are moderate- to wide-bandgap semiconductors with incipient ionic conductivity and a host of ferroic properties are reviewed. It is argued that this material class has the potential to merge the sought-after properties of complex oxides with electronic functions of 2D and quasi-2D electronic materials, as well as to create new avenues for both applied and fundamental materials research in structural and magnetic correlations.

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Potential 2D Materials with Phase Transitions: Structure, Synthesis, and Device Applications

et al. 2018

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bandgap can overcome the short channel effect, and then can scale down transistors to sub-10 nm [13,14] and even sub-5 nm [10,[15][16][17][18] to extend the Moore's law. Over last decades, typical 2D semiconductors, such as MoS 2 and WSe 2 , have been intensively studied. [19][20][21][22] On the other hand, 2D materials with versatile phase-transition properties offer new opportunities in both fundamental research and future device applications. In the last few years, a lot of exciting experiments have been conducted on this subfamily of 2D materials in the monolayer limit, such as charge density wave (CDW) 1T-TaS 2 , [23][24][25][26] superconducting (SC) 2H-NbSe 2 , [27][28][29] ferromagnetic (FM) CrI 3 , [12,30,31] and Cr 2 Ge 2 Te 6 . [11,32] CDW is a phenomenon of forming a standing-wave-like electron density usually accompanied with a lattice distortion and a bandgap opening due to electronphonon interaction. [33] SC is a phenomenon of zero electrical resistance and expulsion of magnetic flux fields also originated from electron-phonon interaction. [34] Magnetism and electric polarization stem from spontaneous spin/dipole ordering, respectively. [35,36] Parallel and antiparallel spins constitute long-range ferromagnetic (FM) and antiferromagnetic (AFM) ordering, respectively. Similarly, parallel and antiparallel dipoles form ferroelectric (FE) and antiferroelectric (AFE) ordering, respectively. Van der Waals layered materials can show a lot of novel properties, especially in the atomic thickness limit. This includes the follow ing terms: (1) The odd/even layer effect may emerge due to weak interlayer coupling. For example, FM or FE ordering may appear in the odd layers, while AFM or AFE ordering may appear in the even layers; (2) Due to confinement effect in the out-of-plane direction, new ordering structures may appear;(3) The properties can be easily tuned by strain, external fields, interface interaction, and so on. Toward fundamental property measurement and device applications, the challenge remains, such as predicting/discovering new 2D phase-transition materials, controlling the chemical synthesis, overcoming the poor air stability, and so on. Here, a literature survey has been carried out to search possible 2D phase-transition materials. Recent progress on the chemical synthesis and property investigation of some obtained monolayers has been reviewed, including CDW 1T-TaS 2 monolayers, FM CrI 3 mono layers, and so on.Layered materials with phase transitions, such as charge density wave (CDW) and magnetic and dipole ordering, have potential to be exfoliated into monolayers and few-layers and then become a large and important subfamily of two-dimensional (2D) materials. Benefitting from enriched physical properties from the collective interactions, long-range ordering, and related phase transitions, as well as the atomic thickness yet having nondangling bonds on the surface, 2D phase-transition materials have vast potential for use in new-concept and functional devices. Here, potential 2D phase-transit...

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Ordre et desordre de repartition des cations metalliques dans le nouveau systeme ; comportement verre de spin

Cited by 6 publications

References 8 publications

Second-harmonic generation in quaternary atomically thin layered AgInP2S6 crystals

Second-harmonic generation in quaternary atomically thin layered AgInP2S6 crystals

Metal Thio‐ and Selenophosphates as Multifunctional van der Waals Layered Materials

Potential 2D Materials with Phase Transitions: Structure, Synthesis, and Device Applications

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