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21 papers
Optical and Terahertz Response of Carbon Nanostructures
Arvind Singh, Sunil Kumar
In the last three decades or so, we have witnessed an extraordinary progress in the research and technology of carbon-based nanomaterials. Among the peculiar highlights are the dis…
Photo-Seebeck effect in single-crystalline bismuth telluride topological insulator
Anand Nivedan, Arvind Singh, Sandeep Kumar +1
Bismuth telluride is a low energy bulk band-gap topological system with conducting surface states. Besides its very good thermoelectric properties, it also makes a very good candid…
Broken translational and rotational symmetries in LiMn1.5Ni0.5O4 spinel
Birender Singh, Sunil Kumar, Pradeep Kumar
In condensed matter physics broken symmetries and emergence of quasi-particles are intimately linked to each other. Whenever a symmetry is broken, it leaves its fingerprints, and t…
Prediction and observation of the first antiferromagnetic topological insulator
Mikhail M. Otrokov, Ilya I. Klimovskikh, Hendrik Bentmann +41
Magnetic topological insulators (MTIs) are narrow gap semiconductor materials that combine non-trivial band topology and magnetic order. Unlike their nonmagnetic counterparts, MTIs…
Rare earth size dependence on structural, electronic and magnetic properties of R2NiMnO6 double perovskites
Mohd Nasir, Sunil Kumar, N. Patra +8
Rare earth Manganite Nickelite double perovskites are prepared by solgel assisted combustion route, where, R varies from La, Pr, Nd, Sm, Gd, Tb, Dy, Y, and Ho. The samples have bee…
Structural, dielectric and ferroelectric studies of thermally stable and efficient energy storage ceramic material: (Na0.5-xKxBi0.5-xLax)TiO3
Anita Verma, Arun Kumar Yadav, Nasima Khatun +7
The structural, dielectric and ferroelectric properties of lead-free (Na0.5-xKxBi0.5-xLax)TiO3 powders synthesized by sol-gel self-combustion method were investigated. Rietveld ref…