Synthesis of single crystals of V2AlC phase by high-temperature solution growth and slow cooling technique

Shi, Lu; Ouisse, T.; Sarigiannidou, E.; Chaix‐Pluchery, Odette; Roussel, Hervé; Chaussende, Didier; Hackens, Benoît

doi:10.1016/j.actamat.2014.10.018

Cited by 41 publications

(40 citation statements)

References 19 publications

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“…We make the case, however, that in some cases, a simple 2D model can be quite useful indeed. This reassessment comes about because of two recent related developments: (i) the availability of relatively large MAX phase single crystals [26][27][28] and more importantly, (ii) the fact that the ρ c /ρ ab ratios for some of these single crystals are as high as 6000 ( Figure 1(b)) [1]. These results are crucial and justify the simple 2D model described in the next section.…”

Section: Introductionmentioning

confidence: 85%

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Ouisse

Barsoum

2017

Materials Research Letters

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Herein, we critically assess magnetotransport in the MAX phases and their 2D derivatives, MXenes. For some MAX phases, a simple, 2D hexagonal metal model describes weak-field magnetotransport of their nearly free electrons reasonably well. For others, experimental and/or theoretical Fermi surfaces need to be mapped-a crucial task required for true understanding. Even less is known about MXenes. The density of apparent mobile carriers in Ti 3 C 2 T x -assuming a single-band model-is ≈ 1 × 10 14 cm −2 (10 28 cm −3 ), which justifies it being sometimes described as a 2D metal. Much work is needed before a clearer picture emerges. IMPACT STATEMENTMagnetotransport in the MAX phases and their 2D derivatives MXene are critically reviewed for the first time. For some, a 2D hexagonal metal can explain magnetotransport; in others not. ARTICLE HISTORY

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Section: Introductionmentioning

confidence: 85%

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Ouisse

Barsoum

2017

Materials Research Letters

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“…We start sample preparation from V 2 AlC single crystals prepared using a method reported previously. 53 and the incident power is kept below 1 mW. A grating of 2400 lines per mm is used in order to achieve a high spectral resolution.…”

Section: Computational Details and Characterization Techniquesmentioning

confidence: 99%

Electronic and vibrational properties ofV2C-based MXenes: From experiments to first-principles modeling

et al. 2018

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In the present work, the electronic and vibrational properties of both pristine V 2 C and fullyterminated V 2 CT 2 (where T = F, O, OH) 2D monolayers are investigated using density functional theory. Firstly, the atomic structures of V 2 C-based MXene phases are optimized and their respective dynamical stabilities are discussed. Secondly, electronic band structures are computed indicating that V 2 C is metallic as well as all the corresponding functionalized systems. Thirdly, the vibrational properties (phonon frequencies and spectra) of V 2 C-based MXenes are computed thanks to density functional perturbation theory and reported for the first time. Both Raman (E g , A 1g ) and infrared active (E u , A 2u ) vibrational modes are predicted ab initio with the aim to correlate the experimental Raman peaks with the calculated vibrational modes and to assign them with specific atomic motions. The effect of the terminal groups on the vibrational properties is emphasized as well as on the presence and position of the corresponding Raman peaks. Our results provide new insights for the identification and characterization of V 2 C-based samples using Raman spectroscopy.

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“…Pure MAX phases were synthesized for the first time in 1996 [3], but the lack of large single crystals has long prohibited a direct assessment of the physical anisotropies expected from their crystal structure (see Figure 1(a,b) for Cr 2 AlC). Macroscopic crystals are now available CONTACT T. Ouisse thierry.ouisse@grenoble-inp.fr Université Grenoble-Alpes, CNRS, Grenoble INP, LMGP, F-38000 Grenoble, France [4][5][6]. They have been used to probe magneto-transport [7,8] and electronic structure [9].…”

Section: Introductionmentioning

confidence: 99%

Phonon dispersion curves in Cr₂AlC single-crystals

Champagne

Bourdarot

Bourges

et al. 2018

Materials Research Letters

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Neutron inelastic scattering is used for the first time to measure phonon dispersion branches in Cr 2 AlC MAX phase single crystals with appreciable size. Phonon spectra are also calculated within the Density Functional Perturbation Theory (DFPT) framework and exhibit a very good match with experimental data, including high energy carbon-related optical branches. Both experiments and ab initio simulations confirm the existence of a substantial phonon gap and discard the presence of any softening mode or possible magnetic effect. IMPACT STATEMENT We synthesized Cr 2 AlC single-crystalline platelets with areas over 10 cm 2. This breakthrough in materials synthesis was a prerequisite for measuring inelastic neutron scattering and phonon anisotropies.

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Synthesis of single crystals of V2AlC phase by high-temperature solution growth and slow cooling technique

Cited by 41 publications

References 19 publications

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Electronic and vibrational properties ofV2C-based MXenes: From experiments to first-principles modeling

Phonon dispersion curves in Cr₂AlC single-crystals

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Synthesis of single crystals of V2AlC phase by high-temperature solution growth and slow cooling technique

Cited by 41 publications

References 19 publications

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Magnetotransport in the MAX phases and their 2D derivatives: MXenes

Electronic and vibrational properties ofV2C-based MXenes: From experiments to first-principles modeling

Phonon dispersion curves in Cr2AlC single-crystals

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Product

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About

Phonon dispersion curves in Cr₂AlC single-crystals