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37 papers
Ultrafast Dynamics of Coherent Phonon Modes in Excitonic Insulator TaNiSe
Vikas Arora, Sukanya Pal, Luminita Harnagea +2
The spontaneous condensation of excitons in the excitonic insulating phase has been reported in TaNiSe below 325 K. In this context, we present the temperature-dependent op…
Pressure Dependence of Ultrafast Carrier Dynamics in Excitonic Insulator TaNiSe
Vikas Arora, Victor S Muthu, Arijit Sinha +3
An excitonic insulator (EI) phase is a consequence of collective many-body effects where an optical band gap is formed by the condensation of electron-hole pairs or excitons. We re…
Ultrafast Spectroscopy of Dirac Semimetal Cd3As2 under Pressure
Vikas Arora, D. V. S. Muthu, R Sankar +1
Topological properties of a three-dimensional Dirac semimetal Cd3As2, protected by crystal rotation and time-reversal symmetry, can be tuned with the application of pressure. Ultra…
Strong coupling of lattice and orbital excitations in quantum magnet CaCrO: Anomalous temperature dependence of Raman phonons
Srishti Pal, Arnab Seth, Anzar Ali +4
We report low-temperature Raman signatures of the Heisenberg quantum magnet CaCrO, showing clear anomalies in phonon mode frequencies and linewidths below 1…
Pressure-induced superconductivity in weak topological insulator BiSe
Pallavi Malavi, Arpita Paul, Achintya Bera +6
Quasi-two-dimensional layered BiSe, a natural super-lattice with Bi2Se3-Bi2-Bi2Se3 units, has recently been predicted to be a dual topological insulator, simultaneously weak topolo…
Pressure tuning of structure, magnetic frustration and carrier conduction in Kitaev spin liquid candidate CuIrO: X-ray, Raman, magnetic susceptibility, resistivity and first-principles analysis
Srishti Pal, Pallavi Malavi, Arijit Sinha +8
The layered honeycomb lattice iridate CuIrO is the closest realization of the Kitaev quantum spin liquid, primarily due to the enhanced interlayer separation and nearly ide…