5 papers
Magnetic correlations in subsystems of the misfit [CaCoO][CoO] cobaltate
Abdul Ahad, K. Gautam, K. Dey +7
[CaCoO][CoO], a two dimensional misfit metallic compound, is famous for its rich phases accessed by temperature, high temperature spin-state transition,…
Origin of the high Seebeck coefficient of the misfit [CaCoO][CoO] cobaltate from site-specific valency and spin-state determinations
Abdul Ahad, K. Gautam, S. S. Majid +4
Layered misfit cobaltate [CaCoO][CoO], which emerged as an important thermoelectric material~[A. C. Masset et al. Phys. Rev. B, 62, 166 (2000)], has been explo…
Non thermal isostructural electrically driven insulator-metal transition and electro-strain in layered cobaltate
Abdul Ahad, R. Rawat, F. Rahman +1
We report here a discovery of electrically driven insulator to metal transition (IMT) and concomitant isostructural volume expansion in the layered cobaltates which otherwise do no…
Role of the V-V dimerization in insulator-metal transition and optical transmittance of pure and doped VO2 thin films
S. S. Majid, S. R. Sahu, A. Ahad +7
Insulator to metal (IMT) transition (T 341 K) in the VO2 accompanies transition from an infrared (IR) transparent to IR opaque phase. Tailoring of the IMT and associated…
Mott-Hubbard insulator-metal transition in the VO2 thin film: A combined XAS and resonant PES study
S. S. Majid, K. Gautam, A. Ahad +4
We have analyzed spectral weight changes in the conduction and the valence band across insulator to metal transition (IMT) in the VO2 thin film using X-ray absorption spectroscopy…