Electronic structure near quantum critical point
Strongly Correlated Electrons
2012-04-04 v1
Abstract
We studied the evolution of the electronic structure across the quantum critical point in V doped Cr employing high resolution photoemission spectroscopy. Experimental results exhibit signatures of pseudogap and orbital Kondo resonance peak at low temperatures for all the compositions studied suggesting a scenario of spin density wave quantum criticality corresponding to orbital Kondo effect. The pseudogap and the Kondo peak gradually reduces with V doping but remains finite at the quantum critical point indicating their relevance in widely discussed quantum phases in correlated electron systems. The spectral lineshape near the Fermi level exhibit (E_F - E)^{0.25} dependence evidencing deviation from Fermi liquid behavior.
Cite
@article{arxiv.1204.0581,
title = {Electronic structure near quantum critical point},
author = {Ganesh Adhikary and R. Bindu and Sudhir K. Pandey and Kalobaran Maiti},
journal= {arXiv preprint arXiv:1204.0581},
year = {2012}
}