Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-04-28
Europhys. Lett. 78 (2007) 17002
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages including 3 figures
Scientific paper
10.1209/0295-5075/78/17002
We investigate the temperature evolution of the electronic states in the vicinity of the Fermi level of a non-Fermi liquid (NFL) system, CaRuO3 using ultra high-resolution photoemission spectroscopy; isostructural SrRuO3 exhibiting Fermi liquid behavior despite similar electron interaction parameters as that of CaRuO3, is used as a reference. High-energy resolution in this study helps to reveal particle-hole asymmetry in the excitation spectra of CaRuO3 in contrast to that in SrRuO3. In addition, we observe signature of phonon excitations in the photoemission spectra of CaRuO3 at finite temperatures while these are weak in SrRuO3.
Maiti Kalobaran
Medicherla V. R. R.
Singh Ravi Shankar
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