Spectral evolution in an insulator exhibiting linear specific heat

Details Spectral evolution in an insulator exhibiting linear specific heat Spectral evolution in an insulator exhibiting linear specific heat

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010njph...12c3026b&link_type=abstract

New Journal of Physics, Volume 12, Issue 3, pp. 033026 (2010).

Physics

3

Scientific paper

In this work, we investigate, using state-of-the-art high-resolution photoemission spectroscopy, the spectral evolution of an antiferromagnetic insulator, La0.2Sr0.8MnO3, exhibiting linear specific heat. Experimental spectral functions exhibited Fermi liquid-like energy dependence at all the temperatures studied. Room temperature spectra possess finite density of states at the Fermi level that vanishes, generating a soft gap at about 265 K (the magnetic transition temperature). High-resolution spectra reveal a hard gap in the magnetically ordered phase (C-type antiferromagnet). These results indicate the signature of an amorphous phase, presumably magnetic in nature, coexisting with the long-range ordered phase in these materials.

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