Low energy excitations in half-doped manganite Eu0.5Sr0.5MnO3

Abstract

We have explored the low-energy dynamics in the half-doped Eu0.5Sr0.5MnO3 using terahertz time domain (TDS) spectroscopy. Observation of a finite frequency peak structure in optical conductivity at around ∼4meV suggests low-energy excitation, presumably the charge-density waves.