2006/03/25 by Myung Whun Kim, Myung Whun KIM, Kim, Myung Whun +14
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0603692
arxiv created 2006/03/25 · openalex publication_date 2006/03/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We have systematically investigated the optical conductivity spectra of La2-2xSr1+2xMn2O7 (0.3 \leqslant x \leqslant 0.5). We find that just above the magnetic ordering temperatures, the optical gap shows an enhancement up to ∼ 0.3 eV near x=0.4. Based on a x-dependent comparison of the nesting vector of the hypothetical Fermi surface and the superlattice wave-vector, we suggest that the peculiar x-dependence of the optical gap can be understood in terms of charge and lattice correlation enhanced by the charge density wave instability in nested Fermi surface.