Critical test for Altshuler-Aronov theory: Evolution of the density of states singularity in double perovskite Sr${}_2$FeMoO${}_6$ with controlled disorder

Abstract

With high-resolution photoemission spectroscopy measurements, the density of states (DOS) near the Fermi level ($E_{\mathrm{F}}$) of double perovskite Sr${}_2$FeMoO${}_6$ having different degrees of Fe/Mo antisite disorder has been investigated with varying temperature. The DOS near $E_{\mathrm{F}}$ showed a systematic depletion with increasing degree of disorder, and recovered with increasing temperature. Altshuler-Aronov (AA) theory of disordered metals well explains the dependences of the experimental results. Scaling analysis of the spectra provides experimental indication for the functional form of the AA DOS singularity.

arXiv comment5 pages, 4 figures

References in corpus (4)

• Magnetoresistance in ordered and disordered double perovskite oxide, Sr${}_2$FeMoO${}_6$
• Disorder effects in electronic structure of substituted transition metal compounds
• Bulk-sensitive photoemission spectroscopy of A_2FeMoO_6 double perovskites (A=Sr, Ba)
• Origin of charge density wave formation in insulators from a high resolution photoemission study of BaIrO3

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