Infrared absorption from Charge Density Waves in magnetic manganites

Details Infrared absorption from Charge Density Waves in magnetic manganites Infrared absorption from Charge Density Waves in magnetic manganites

1998-10-09

arxiv.org/abs/cond-mat/9810121v1

Phys. Rev. Lett., 81 (1998) 4504

Physics

Condensed Matter

Strongly Correlated Electrons

File revtex + 3 figs. in epsf. To appear on Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.4504

The infrared absorption of charge density waves coupled to a magnetic background is first observed in two manganites La{1-x}Ca{x}MnO{3} with x = 0.5 and x = 0.67. In both cases a BCS-like gap 2 Delta (T), which for x=0.5 follows the hysteretic ferro-antiferromagnetic transition, fully opens at a finite T{0} < T{Neel}, with 2 Delta(T{0})/kT{c} close to 5. These results may also explain the unusual coexistence of charge ordering and ferromagnetism in La{0.5}Ca{0.5}MnO{3}.

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