Pressure-induced metallization in MoSe₂ under different pressure conditions

Abstract

Our experimental results clearly indicate that the metallization behavior of MoSe2 exhibits significant dependence on the pressure environments.

Molybdenum Dichalcogenide Cathodes for Aluminum-Ion Batteries

“…Yang et al and Sharma et al have reported that E 1 2g and A 1 g are the most intense vibrational modes for molybdenum dichalcogenides. [21][22][23] Peaks corresponding to E 1 2g and A 1 g modes for MoS 2 (Figure 9a) are prominent at 384.6 and 410.2 cm À1 , respectively. A 1 g indicates an out-of-plane symmetric displacement of S atoms, whereas E 1 2g suggests an in-layer displacement.…”

Structural Phase Transition and Metallization of Nanocrystalline Rutile Investigated by High-Pressure Raman Spectroscopy and Electrical Conductivity

“…This was possibly related to the different grain size, which may have resulted in a discrepancy of the pressure point of phase transition and the width of the phase coexistence regime reported by Olsen et al and us. To check the high-pressure metallization of nanocrystalline rutile, we performed temperaturedependent electrical conductivity measurements up to 25.0 GPa at 120-240 K. As usual, the electrical conductivity of sample increased with increasing temperature for semiconductor, whereas the metal To check the high-pressure metallization of nanocrystalline rutile, we performed temperaturedependent electrical conductivity measurements up to 25.0 GPa at 120-240 K. As usual, the electrical conductivity of sample increased with increasing temperature for semiconductor, whereas the metal exhibited a negative relation between the temperature and electrical conductivity [15][16][17][18]. The temperature-dependent electrical conductivity measurements of nanocrystalline rutile at selected pressures are plotted in Figure 5.…”

“…Therefore, the metallization of nanocrystalline rutile is attributed to the enhancement of defect concentration rather than the closure of bandgap. exhibited a negative relation between the temperature and electrical conductivity [15][16][17][18]. The temperature-dependent electrical conductivity measurements of nanocrystalline rutile at selected pressures are plotted in Figure 5.…”

“…The plate electrode was integrated into both diamond anvils. A low temperature was obtained by liquid nitrogen and an experimental temperature was measured by a k-type thermocouple with an estimated accuracy of 5 K. Detailed descriptions of the high-pressure experimental procedures and measurement methods can be found elsewhere [14][15][16][17][18].…”

“…As usual, the pressure-induced structural phase transition, metallization, and amorphization are accompanied by the variation of electrical transport characteristics for some engineering materials [14][15][16][17][18]. To the best of our knowledge, only one high-pressure electrical resistivity experiment on the synthetic rutile with various Ni-doped concentrations was reported under a limited pressure range by using a Bridgman opposed anvil setup [19].…”