INVESTIGATION OF THE CHARGE DENSITY WAVES IN IT-VSe<sub>2</sub> BY RAMAN SCATTERING

Sugai, S.; Murase, K.; Uchida, S.; Tanaka, Shōji

doi:10.1051/jphyscol:19816217

Cited by 15 publications

(24 citation statements)

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“…In recent years, temperature-dependent Raman spectra of 1T-VSe 2 [71], 1T-TaS 2 [72], 1T-TaSe 2 [28], 2H-TaSe 2 [31,73], 1T-TiSe 2 [11] and 2H-NbSe 2 [10] have been reported. In addition, Raman spectroscopy has been used vastly to investigate stacking order [74,75], number of layers [76], molecular doping [77], edge orientations [78,79], strain effects [80,81] and other properties of 2D materials.…”

Section: Raman Spectroscopic Characterizationmentioning

confidence: 99%

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

et al. 2017

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Abstract:Recently, two-dimensional (2D) charge density wave (CDW) materials have attracted extensive interest due to potential applications as high performance functional nanomaterials. As other 2D materials, 2D CDW materials are layered materials with strong in-plane bonding and weak out-of-plane interactions enabling exfoliation into layers of single unit cell thickness. Although bulk CDW materials have been studied for decades, recent developments in nanoscale characterization and device fabrication have opened up new opportunities allowing applications such as oscillators, electrodes in supercapacitors, energy storage and conversion, sensors and spinelectronic devices. In this review, we first outline the synthesis techniques of 2D CDW materials including mechanical exfoliation, liquid exfoliation, chemical vapor transport (CVT), chemical vapor deposition (CVD), molecular beam epitaxy (MBE) and electrochemical exfoliation. Then, the characterization procedure of the 2D CDW materials such as temperature-dependent Raman spectroscopy, temperature-dependent resistivity, magnetic susceptibility and scanning tunneling microscopy (STM) are reviewed. Finally, applications of 2D CDW materials are reviewed.

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Section: Raman Spectroscopic Characterizationmentioning

confidence: 99%

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

et al. 2017

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“…These positions coincide with the Raman lines observed by us and by other authors. 12,19 In addition, the intensity of the lowenergy PCS peaks is considerably enhanced. This can be explained by a decrease of the relative intensity of the highfrequency peaks consecutive to the influence of the pointcontact form factor K. This form factor depends on the geometry and the purity of the contact.…”

mentioning

confidence: 99%

“…In particular, the Raman modes are more or less smeared out and weaker than those of 2H-TaSe 2 by at least one order of magnitude. 12 Therefore, in this paper, we focus primarily at investigating the phonon subsystem in 1T-VSe 2 and the interaction of quasiparticle excitations with current carriers. This will allow for the determination of the EPI function in the CDW state and other quantities.…”

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confidence: 99%

Direct determination of Debye temperature and electron-phonon interaction in1T−VSe2

et al. 2001

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Crystals of the layered two-dimensional transition-metal dichalcogenide 1T-VSe 2 are investigated by pointcontact spectroscopy in the charge-density wave state. Relevant characteristics such as mean, root-meansquare, and Debye phonon frequencies are obtained. The Debye temperature is ⌰ D ϭ220Ϯ5 K, close to that of 2H-NbSe 2 . The point-contact function g pc () of the electron-phonon interaction reveals a moderate coupling constant pc ϭ0.27. Consequently, the Coulomb potential, the density of states at the Fermi level, and the deformation potential are estimated to be of order 0.22 eV, 2.5 states/eV, and 0.22 eV/Å , respectively.

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“…Raman spectroscopy is a powerful tool to understand the vibrational properties of two-dimensional (2D) materials; it's also based on temperature-dependent. Recently, Raman spectra (temperature-dependent) of 1T-VSe 2 [84], 1T-TaS 2 [85], 1T-TaSe 2 [86], 2H-TaSe 2 [87,88], 1T-TiSe 2 [89] and 2H-NbSe 2 [90] have been reported. In addition, Raman spectroscopy has been used vastly to investigate stacking order [91,92], number of layers [93], molecular doping [94], edge orientations [95,96], strain effects [97,98] and other properties of two-dimensional (2D) materials.…”

Section: Raman Spectroscopic Techniquementioning

confidence: 99%

A Review of Two-Dimensional Materials in Electrocatalysis and Their Potential Applications

Muhammad¹

2019

AJMSP

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Two-dimensional materials are crystalline materials consist of a single layer of atoms and sometimes referred to as single layer materials. Electrocatalytic energy conversion using renewable power sources is one of the most promising ways for energy storage and energy utilization in the new century. Over the past years, a great number of two-dimensional (2D) materials have been explored for various electrocatalytic reactions, such as the hydrogen evolution reaction, Carbon (IV) oxide (CO 2) reduction reaction and Oxygen (O 2) reduction reaction. This research provides an overview on the synthesis techniques of materials including bottom up approaches such as chemical vapor deposition (CVD) and physical vapor deposition (PVD) and top-down approaches like mechanical exfoliation, chemical exfoliation. Then, the characterization techniques of the two-dimensional (2D) materials such as Raman spectroscopy, X-ray diffraction, temperature-dependent resistivity and magnetic susceptibility and scanning tunneling microscopy (STM) are reviewed. Finally, potential applications of two-dimensional (2D) materials and conclusion, challenges and future work are discussed.

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INVESTIGATION OF THE CHARGE DENSITY WAVES IN IT-VSe₂ BY RAMAN SCATTERING

Cited by 15 publications

References 0 publications

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

Direct determination of Debye temperature and electron-phonon interaction in1T−VSe2

A Review of Two-Dimensional Materials in Electrocatalysis and Their Potential Applications

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INVESTIGATION OF THE CHARGE DENSITY WAVES IN IT-VSe2 BY RAMAN SCATTERING

Cited by 15 publications

References 0 publications

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

Recent Advances in Two-Dimensional Materials with Charge Density Waves: Synthesis, Characterization and Applications

Direct determination of Debye temperature and electron-phonon interaction in1T−VSe2

A Review of Two-Dimensional Materials in Electrocatalysis and Their Potential Applications

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Product

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INVESTIGATION OF THE CHARGE DENSITY WAVES IN IT-VSe₂ BY RAMAN SCATTERING