Magneto-optical transport properties of monolayer transition metal dichalcogenides

Hien, Nguyen Dinh; Nguyen, Chuong V.; Hieu, Nguyen N.; Kubakaddi, S. S.; Duque, C.A.; Mora-Ramos, M.E.; Đình, Lê; Bich, Tran N.; Phuc, Huynh V.

doi:10.1103/physrevb.101.045424

Cited by 78 publications

(42 citation statements)

References 69 publications

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“…The impurity scattering is considered in the short-ranged potential case [44] and is demonstrated to play a substantial role, especially in the low-temperature regime. As for the phonon scattering, all three acoustic [outof-plane (ZA), transverse (TA), and longitudinal (LA)] and optical (ZO, TO, LO) phonon modes of silicene [32,42,45] are included and discussed meticulously, making the present work's results much more fulfilled than our previous works [29,31]. The full-width at half-maximum (FWHM) of the resonant peaks is obtained by the computational method and discussed in detail.…”

Section: Introductionmentioning

confidence: 84%

“…Note that the effective Hamiltonian Eq. (1) has the same form of that in TMDCs systems [31] because both TMDCs and silicene as well as germanene are the 2D systems. The main differences between them come from the energy gap and the SOC terms.…”

Section: Basic Formulationmentioning

confidence: 95%

“…While in TMDCs the large natural band gap is the cause of their large energy gap term (for example, = 0.83 eV in MoS 2 , see Table I of Ref. [31]), there is a complete lack of this term, i.e., = 0, in silicene and germanene as shown in Eq. (1).…”

Section: Basic Formulationmentioning

confidence: 99%

“…The magneto-optical absorption is one of the important properties studied in the literature in bulk semiconductors [24], low-dimensional systems [25][26][27], and more recently in monolayers of graphene [28] and transition-metal dichalcogenides (TMDCs) [29][30][31]. In this phenomenon, in quantizing magnetic field, optical absorption takes place by absorbing a photon and making inter-Landau level transition with/without the assistance of impurity or phonons scattering.…”

Section: Introductionmentioning

confidence: 99%

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Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

et al. 2020

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We study the optical absorption properties of silicene and germanene in the presence of the perpendicular magnetic and electric fields. Their low-energy Landau level (LL) spectra are controllable by an external electric field, where the spin-and valley-degeneracy of the LLs are strongly influenced by the electric and Zeeman fields. The electric field has removed spin-degeneracy at a given valley. Analytical expressions for the magneto-optical absorption coefficient (MOAC) are expressed in the presence of the interaction between carriers and random impurities and the intrinsic phonons including the spin and valley effects. The results evaluated for the topological insulator and valley-spin-polarized metal phases showed that when the electric field is included, the MOAC peaks are separated for opposite spin cases where the splitting in germanene is stronger than that in silicene. The peak's intensity caused by the carrier-photon-impurity scattering is the highest, the next is the carrier-photon scattering, while the carrier-photon-phonon scattering shows the lowest in both materials. Among the different phonon modes, the out-of-plane (ZA) mode in silicene dominates the others, being attributed to its buckled atomic structure, which does not exist in graphene. When the ZA mode is taken into account, the estimated resultant mobility from the full-width at half-maximum is significantly supported by the experimental result in silicene.

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Section: Introductionmentioning

confidence: 84%

Section: Basic Formulationmentioning

confidence: 95%

Section: Basic Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

et al. 2020

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“…Transition metal dichalcogenides (TMDCs) have attracted unprecedented attention in the last few years. As layered thin-film materials, two-dimensional (2D) TMDCs have massive advantages of the adjustable band gap, high carrier mobility, and excellent mechanical properties [ 1 , 2 , 3 , 4 ]. Molybdenum disulfide (MoS 2 ) is one of the most popular 2D TMDCs materials.…”

Section: Introductionmentioning

confidence: 99%

An In Situ Reflectance Spectroscopic Investigation to Monitor Two-Dimensional MoS2 Flakes on a Sapphire Substrate

et al. 2020

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In this work, we demonstrate the application of differential reflectance spectroscopy (DRS) to monitor the growth of molybdenum disulfide (MoS2) using chemical vapor deposition (CVD). The growth process, optical properties, and structure evolution of MoS2 were recorded by in-situ DRS. Indeed, blue shifts of the characteristic peak B were discussed with the decrease of temperature. We also obtained the imaginary part of the MoS2 dielectric constant according to reflectance spectra. This method provides an approach for studying the change of two-dimensional (2D) materials’ dielectric constant with temperature. More importantly, our work emphasizes that the DRS technique is a non-destructive and effective method for in-situ monitoring the growth of 2D materials, which is helpful in guiding the preparation of 2D materials.

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Growth and Characterizations of Rhenium Disulfide (ReS₂) Single Crystals

Ghetiya

Chaki

Khimani

et al. 2021

Physica Status Solidi (a)

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Rhenium disulfide (ReS2) single crystals are grown by chemical vapor transport technique. Powder X‐ray diffraction analysis of the single crystals shows them to possess ReS2 phase with triclinic unit cell structure. Energy dispersive analysis of X‐rays shows the crystals to be slightly rich in sulfur and deficient in rhenium. The optical bandgap obtained of the as‐grown single crystals is 1.35 eV. The surface morphology study done by scanning electron microscopy shows that the crystal surface to be flat with layer edges, such observation states that the growth mechanism of crystal have happened by mechanism of sheet spreading. The transmission and diffraction mode electron microscopy shows the single crystals to be layered and crystalline, respectively. The Raman peaks are well assigned to the ReS2. Thermogravimetric and differential thermogravimetric analysis shows the single crystals to disintegrate by two steps. The differential thermal analysis shows that the ReS2 possesses initial endothermic followed by exothermic nature for fast heating rates. In case of a slow heating rate of 10 K min−1, other than endothermic followed by exothermic, the end temperature range shows endothermic nature. The kinetic parameters determined by Kissinger relation shows the single‐crystal samples to disintegrate at a higher temperature range.

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Magneto-optical transport properties of monolayer transition metal dichalcogenides

Cited by 78 publications

References 69 publications

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

An In Situ Reflectance Spectroscopic Investigation to Monitor Two-Dimensional MoS2 Flakes on a Sapphire Substrate

Growth and Characterizations of Rhenium Disulfide (ReS₂) Single Crystals

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Magneto-optical transport properties of monolayer transition metal dichalcogenides

Cited by 78 publications

References 69 publications

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

Magneto-optical absorption in silicene and germanene induced by electric and Zeeman fields

An In Situ Reflectance Spectroscopic Investigation to Monitor Two-Dimensional MoS2 Flakes on a Sapphire Substrate

Growth and Characterizations of Rhenium Disulfide (ReS2) Single Crystals

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Growth and Characterizations of Rhenium Disulfide (ReS₂) Single Crystals