scholarly journals Quasiparticle band gaps and optical spectra of strained monolayer transition-metal dichalcogenides

2017 ◽  
Vol 96 (23) ◽  
Author(s):  
Wenshen Song ◽  
Li Yang
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Optical Spectra ◽  
Band Gaps ◽  
Metal Dichalcogenides ◽  
Quasiparticle Band

scholarly journals Strain dependence of band gaps and exciton energies in pure and mixed transition-metal dichalcogenides

2016 ◽  
Vol 94 (15) ◽  
Author(s):  
Rodrick Kuate Defo ◽  
Shiang Fang ◽  
Sharmila N. Shirodkar ◽  
Georgios A. Tritsaris ◽  
Athanasios Dimoulas ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Band Gaps ◽  
Strain Dependence ◽  
Metal Dichalcogenides ◽  
Mixed Transition

Tuning Band Gaps of Transition Metal Dichalcogenides WX2 (X = S, Se) Nanoribbons by External Strain

2016 ◽  
Vol 16 (8) ◽  
pp. 8090-8095 ◽  
Author(s):  
Zhixiang Zhang ◽  
Jiqing Wang ◽  
Changsheng Song ◽  
Huibing Mao ◽  
Qiang Zhao
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Band Gaps ◽  
Metal Dichalcogenides ◽  
External Strain

scholarly journals Intrinsic lifetime of higher excitonic states in tungsten diselenide monolayers

Nanoscale ◽  
2019 ◽  
Vol 11 (25) ◽  
pp. 12381-12387 ◽  
Author(s):  
Samuel Brem ◽  
Jonas Zipfel ◽  
Malte Selig ◽  
Archana Raja ◽  
Lutz Waldecker ◽  
...  
Keyword(s):  
Transition Metal ◽  
Room Temperature ◽  
Transition Metal Dichalcogenides ◽  
Optical Spectra ◽  
Tungsten Diselenide ◽  
Dielectric Screening ◽  
Metal Dichalcogenides ◽  
Excitonic States

The reduced dielectric screening in atomically thin transition metal dichalcogenides allows to study the hydrogen-like series of higher exciton states in optical spectra even at room temperature.

scholarly journals Ultrafast evolution of the complex dielectric function of monolayer WS2 after photoexcitation

2021 ◽  
Author(s):  
Stefano Calati ◽  
Qiuyang Li ◽  
Xiaoyang Zhu ◽  
Julia Stähler
Keyword(s):  
Transition Metal ◽  
Time Evolution ◽  
Dielectric Function ◽  
Transition Metal Dichalcogenides ◽  
Optical Spectra ◽  
Complex Dielectric Function ◽  
Metal Dichalcogenides

Transition metal dichalcogenides emerged as ideal materials for the investigation of exciton physics. Retrieving the excitonic signature in optical spectra, and tracking their time evolution upon photoexcitation requires appropriate analysis...

Magneto-optical spectra of transition metal dichalcogenides: A comparative study

2014 ◽  
Vol 105 (22) ◽  
pp. 222411 ◽  
Author(s):  
Yen-Hung Ho ◽  
Chih-Wei Chiu ◽  
Wu-Pei Su ◽  
Ming-Fa Lin
Keyword(s):  
Transition Metal ◽  
Comparative Study ◽  
Transition Metal Dichalcogenides ◽  
Optical Spectra ◽  
Metal Dichalcogenides

2-Dimensional Transition Metal Dichalcogenides with Tunable Direct Band Gaps: MoS2(1-x)Se2xMonolayers

2013 ◽  
Vol 26 (9) ◽  
pp. 1399-1404 ◽  
Author(s):  
John Mann ◽  
Quan Ma ◽  
Patrick M. Odenthal ◽  
Miguel Isarraraz ◽  
Duy Le ◽  
...  
Keyword(s):  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Band Gaps ◽  
Metal Dichalcogenides ◽  
Direct Band

Structural, Electronic and Optical Properties of Transition Metal Dichalcogenides Layer PtS2 (Se2) for Nano Devices Applications

2021 ◽  
Vol 886 ◽  
pp. 48-56
Author(s):  
Rusul A. Ghazi ◽  
Dhay Ali Sabur ◽  
Ruaa S. Al-Hasnawy ◽  
Haider O. Muhsen ◽  
Bahjat B. Kadhim ◽  
...  
Keyword(s):  
Optical Properties ◽  
Transition Metal ◽  
Transition Metal Dichalcogenides ◽  
Band Gaps ◽  
Two Dimensional ◽  
Electronic And Optical Properties ◽  
New Class ◽  
Metal Dichalcogenides ◽  
Direct Band ◽  
Indirect Band Gap

Monolayer materials are promising material in applications, such as possess some layers with sturdy in-plane bonds. These materials represents two-dimensional (2D) materials which are possess a vertical weak Van der Waals (VdW) interactions sandwiched among the neighboring sheets. These structures of layers offer the chance to be split to free atomic layers. So new class material with two dimensional transition metal dichalcogenides which includes PtS2 (Se2) have unique geometric structural, electronic and optical properties are studied. It has attracted the attention of many researchers for its extensive applications in (catalysis, sensing, electronics, and optoelectronics devices). It has been disclosed from the outcomes that these monolayers are dynamically stable according to the phonon calculations. Also, the direct band gaps located at K point for MoS2 and MoSe2 are 1.67 eV and 1.484 eV and for PtS2 and PtSe2 located between Γ-M points are 1.887 and 1.66, respectively. Also, the PtS2 have indirect band gap of about 1.775 eV situated at KΓ- ΓM and for PtSe2 is 1.401 eV at Γ- ΓM path. The results show that the maximum absorption coefficients are between 14×104 and 16.4×104 cm-1 for PtS2 and MoSe2, respectively. Besides, the maximum conductivities are between 2.09×101 and 3.65×1015 1/s for PtSe2 and MoS2, and the major values Likewise, the optical properties determined over rang energy 0.30 eV. The work function is equal 6.197eV for PtS2 and 5.628eV for PtSe2. It has been shown by studying photon dispersion of both monolayers that it is stable because it does not contain imaginary frequencies.

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