Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2011-11-08
Phys. Rev. Lett. 107, 207202 (2011)
Physics
Condensed Matter
Strongly Correlated Electrons
accepted in Physical Review Letters
Scientific paper
10.1103/PhysRevLett.107.207202
We report an inelastic neutron scattering study of acoustic phonons in the charge and orbitally ordered bilayer manganite LaSr$_2$Mn$_2$O$_7$. For excitation energies less than $15\,\rm{meV}$, we observe an abrupt increase (decrease) of the phonon energies (linewidths) of a transverse acoustic phonon branch at $\mathbf{q} = (h, h, 0)$, $h\le0.3$, upon entering the low temperature charge and orbital ordered state ($T_{COO} = 225\,\rm{K}$). This indicates a reduced electron-phonon coupling due to a decrease of electronic states at the Fermi level leading to a partial removal of the Fermi surface below $T_{COO}$ and provides direct experimental evidence for a link between electron-phonon coupling and charge order in manganites.
Castellan John-Paul
Chen Yafeng
Chi Songxue
Lynn Jacob W.
Mitchell John F.
No associations
LandOfFree
Response of acoustic phonons to charge and orbital order in the 50\% doped bilayer manganite LaSr$_2$Mn$_2$O$_7$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Response of acoustic phonons to charge and orbital order in the 50\% doped bilayer manganite LaSr$_2$Mn$_2$O$_7$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Response of acoustic phonons to charge and orbital order in the 50\% doped bilayer manganite LaSr$_2$Mn$_2$O$_7$ will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-53762