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    Browsing Physics (PHY) by Advisor "Muthu, D V S"

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      • Iridates, Black Phosphorus, Weyl and Dirac Semimetals Under Extreme Conditions : Raman Study 

        Gupta, Satyendra Nath
        This thesis presents Raman studies of Sodium iridates (Na2IrO3 and Na4Ir3O8), VO2, black phosphorus, Weyl (TaAs, TaP, NbP and NbAs) and Dirac (Cd3As2) semimetals under ex-treme conditions like low temperature (upto 4K), ...
      • Linear and Nonlinear Ultrafast Time Resolved Spectroscopy of Topological Insulators, Weyl Semimetals and Semiconducting Nanowires 

        Mithun, K P
        Ultrafast time resolved spectroscopy has recently gained immense significance due to its potential capability to explore the dynamics of photoexcited carriers in condensed matter systems. The technique has proved to be a ...
      • Non-Equilibrium Phenomena in Sheared Soft Matter and Active Granular System 

        Bera, Pradip Kumar
        In this thesis, we have studied non-equilibrium phenomena in sheared soft matter systems and in granular active matter. The surfactant systems are driven out of thermal equilibrium by applying external forcing at the ...
      • Novel spin, charge, and lattice dynamics in pyrochlore iridates : Raman and X-ray diffraction studies at low temperatures and high pressure 

        Rosalin, M
        This thesis investigates phonon dynamics, electronic, and spin excitations along with structural instabilities and phase transitions in rare earth pyrochlore iridates, A2Ir2O7 (A = Pr, Gd, Dy, and Er) and Bi-doped Sm2Ir2O7 ...
      • Phonon anomalies in pyrochlores and 2D materials under extreme conditions: Insights from Raman spectroscopic studies 

        Thomas, Anoop
        In solids, electrons do not behave as separate particles but instead interact intensely to form quasiparticles, which couple with other quasiparticles such as phonon, plasmon, and exciton to generate emergent quantum ...
      • Raman Spectroscopy Of Graphene And Graphene Analogue MoS2 Transistors 

        Chakraborty, Biswanath (2016-06-18)
        The thesis presents experimental studies of device characteristics and vibrational properties of atomic layer thin graphene and molybdenum disulphide (MoS2). We carried out Raman spectroscopic studies on field effect ...
      • Raman Studies of Topological Crystalline Insulator, Natural Heterostructures, Excitonic Insulator and Layered Oxide Under Pressure 

        Pal, Sukanya
        The theme of this thesis is Raman spectroscopic study of a variety of exotic states of matter under extreme conditions, such as, hydrostatic pressure as high as 25 GPa and a wide temperature range from 77 K to 390 K. Raman ...
      • Raman Study of gated devices in two-dimensional materials and pressure effects 

        Das, Subhadip
        This thesis presents Raman study of 2D materials of contemporary interests: 2H-MoTe_2, type-II Weyl semimetal (T_d-MoTe_2), structurally anisotropic semiconductors (1T'-ReX_2 (X=S, Se)) and Mott insulator (FePS_3) under ...
      • Spectroscopic and Diffraction Signatures of Quantum Spin Liquids, Skyrmion Lattices and Transition Metal Dichalcogenides at Low Temperatures and High Pressures 

        Pal, Srishti
        This thesis presents experimental as well as theoretical studies on several contemporary systems like quantum spin liquids (QSLs), skyrmion lattices, and transition metal dichalcogenides (TMDs) under extreme conditions ...
      • Structural signatures of relaxation mechanisms in glass forming and devitrifying colloidal suspensions 

        Divya, G
        Connecting macroscopic behavior of matter to the microscopic interactions is the central goal of condensed matter physics. Yet, achieving such a challenging goal in atomic and molecular systems would require tracking all ...
      • Topological Insulators and Transition Metal Dichalcogenides Under Extreme Conditions : Optical Studies 

        Bera, Achintya
        This thesis presents experimental as well as theoretical studies of three dimensional topological in-sulators (TIs) and transition metal dichalcogenides (TMDs). Raman spectroscopic measurements of these systems have been ...
      • Ultrafast Photoexcited Carrier Dynamics in Low Dimensional Systems Probed by Time Resolved Terahertz Spectroscopy 

        Kar, Srabani
        The key aspect of this thesis is to understand the photoinduced carrier dynamics in low dimensional systems by employing time resolved optical pump-terahertz probe (OPTP) spectroscopy. Ultrafast pulsed laser (Ti: Sapphire ...
      • Ultrafast Spectroscopy of Quantum Materials at High Pressure and Low Temperatures 

        Arora, Vikas
        The photo-induced carrier dynamics using ultrafast spectroscopy provides insights into understanding of electron-electron interactions, electron-phonon interactions, quasiparticle formation, carriers recombination, trapping ...

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