Origin of charge density wave formation in insulators from a high resolution photoemission study of BaIrO3

Maiti, Kalobaran ; Singh, Ravi Shankar ; Medicherla, V. R. R. ; Rayaprol, S. ; Sampathkumaran, E. V. (2005) Origin of charge density wave formation in insulators from a high resolution photoemission study of BaIrO3 Physical Review Letters, 95 (1). 016404_1-016404_4. ISSN 0031-9007

[img]
Preview
PDF - Author Version
309kB

Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.95.016...

Related URL: http://dx.doi.org/10.1103/PhysRevLett.95.016404

Abstract

We investigate the origin of charge density wave (CDW) formation in insulators by studying BaIrO3 using high-resolution (1.4 meV) photoemission spectroscopy. The spectra reveal the existence of localized density of states at the Fermi level, EF, in the vicinity of room temperature. These localized states are found to vanish as the temperature is lowered, thereby, opening a soft gap at EF, as a consequence of CDW transition. In addition, the energy dependence of the spectral density of states reveals the importance of magnetic interactions, rather than well-known Coulomb repulsion effect, in determining the electronic structure thereby implying a close relationship between ferromagnetism and CDW observed in this compound. Also, Ba core level spectra surprisingly exhibit an unusual behavior prior to CDW transition.

Item Type:Article
Source:Copyright of this article belongs to The American Physical Society.
ID Code:45640
Deposited On:29 Jun 2011 03:31
Last Modified:18 May 2016 01:51

Repository Staff Only: item control page