R. S. Singh

Importance of conduction electron correlation in a Kondo lattice, Ce2CoSi3

Kondo systems are usually described by the interaction of the correlation induced local moments with the highly itinerant conduction electrons. Here, we study the role of electron correlations among conduction electrons in the electronic structure of a Kondo lattice compound, Ce₂CoSi₃, using high resolution photoemission spectroscopy and ab initio band structure calculations, where Co 3d electrons contribute in the conduction band. High energy resolution employed in the measurements helped to reveal the signatures of Ce 4f states derived Kondo resonance features at the Fermi level and the dominance of Co 3d contributions at higher binding energies in the conduction band. The lineshape of the experimental Co 3d band is found to be significantly different from that obtained from the band structure calculations within the local density approximations, LDA. Consideration of electron-electron Coulomb repulsion, U, among Co 3d electrons within the LDA + U method leads to a better representation of experimental results. The signature of an electron correlation induced satellite feature is also observed in the Co 2p core level spectrum. These results clearly demonstrate the importance of the electron correlation among conduction electrons in deriving the microscopic description of such Kondo systems.

Electronic structure of Pr Co O 3 and its temperature evolution

We investigate the detailed electronic structure of

Observation of pseudogap in MgB2

\mathrm{Pr}\mathrm{Co}{\mathrm{O}}_{3}

Electronic structure of PrCoO 3 and its temperature evolution

and its temperature evolution by using high-resolution photoemission spectroscopy and ab initio band structure calculations. We observe that, in addition to the correlation effect, spin-orbit interaction plays an important role in determining the electronic properties of this system.

Electronic structure ofPrCoO3and its temperature evolution

\mathrm{Pr}\phantom{\rule{0.2em}{0ex}}4f

Investigation of the spin state of Co in La Co O 3 at room temperature: Ab initio calculations and high-resolution photoemission spectroscopy of single crystals

states are found to be strongly hybridized with the

Evidence for strong 5d electron correlations in the pyrochlore Y 2 Ir 2 O 7 studied using high-resolution photoemission spectroscopy

\mathrm{O}\phantom{\rule{0.2em}{0ex}}2p

Kondo resonance in a magnetically ordered compound Ce2RhSi3: Photoemission spectroscopy and ab initio band structure calculations

and

Evidence of active role played by the nonmagnetic element Sr in magnetostructural coupling in SrRuO3

\mathrm{Co}\phantom{\rule{0.2em}{0ex}}3d

Genetic variability and relationship analysis of Bipolaris sorokiniana isolates causing spot blotch disease in wheat using random amplified polymorphic DNA (RAPD) markers

valence electronic states and appear in the vicinity of the Fermi level. The calculated results corresponding to the intermediate spin state of Co provide a good representation of the experimental spectra at