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Pressure-induced 1T to 3R structural phase transition in metallic VSe2: X-ray diffraction and first-principles theory
Srishti Pal, Koyendrila Debnath, Satyendra Nath Gupta +4
We study pressure-induced structural evolution of vanadium diselenide (VSe2), a 1T polymorphic member of the transition metal di-chalcogenide (TMD) family using synchrotron-based p…
Pressure-induced Lifshitz transition in NbP: Raman, x-ray diffraction, electrical transport and density functional theory
Satyendra Nath Gupta, Anjali Singh, Koushik Pal +8
We report high pressure Raman, synchrotron x-ray diffraction and electrical transport studies on Weyl semimetals NbP and TaP along with first-principles density functional theoreti…
Enhanced Raman and photoluminescence response in monolayer MoS due to laser healing of defects
Achintya Bera, D V S Muthu, A K Sood
Bound quasiparticles, negatively charged trions and neutral excitons, are associated with the direct optical transitions at the K-points of the Brillouin zone for monolayer MoS…
Pressure-dependent Semiconductor to Semimetal and Lifshitz transitions in 2H-MoTe: Raman and First-principles studies
Achintya Bera, Anjali Singh, D V S Muthu +2
High pressure Raman spectroscopy of bulk 2H-MoTe upto 29 GPa is shown to reveal two phase transitions (at 6 and 16.5 GPa), which are analyzed using first-principl…
Temperature dependent magnetic, dielectric and Raman studies of partially disordered La2NiMnO6
Pradeep Kumar, S. Ghara, B. Rajeswaran +3
We report a detailed magnetic, dielectric and Raman studies on partially disordered and biphasic double perovskite La2NiMnO6. DC and AC magnetic susceptibility measurements show tw…
Raman evidence for coupling of superconducting quasi-particles with a phonon and crystal field excitation in superconductor Ce0.6Y0.4FeAsO0.8F0.2
Pradeep Kumar, D. V. S. Muthu, J. Prakash +2
We report inelastic light scattering experiments on superconductor Ce0.6Y0.4FeAsO0.8F0.2 from 4K to 300K covering the superconducting transition temperature Tc ~ 48.6K. A strong ev…