Infrared absorption from Charge Density Waves in magnetic manganites
P. Calvani, G. De Marzi, P. Dore, S. Lupi, P. Maselli, F. D'Amore, S., Gagliardi (INFM - Dip. di Fisica, Universita' La Sapienza, Roma, Italy), and, S-W. Cheong (Lucent Technologies, Bell Labs., Murray Hill, U.S.A., and Dept., of Physics, Rutgers University, Piscataway, U.S.A.)
TL;DR
This study reports the first observation of infrared absorption from charge density waves in magnetic manganites, revealing a BCS-like gap that correlates with magnetic transitions and explains coexistence of charge order and ferromagnetism.
Contribution
It provides the first experimental evidence of infrared absorption from charge density waves in magnetic manganites, linking electronic and magnetic properties.
Findings
Observation of a BCS-like gap in infrared spectra
Gap fully opens below a finite temperature T0
Results explain coexistence of charge order and ferromagnetism
Abstract
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}.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.