In-plane anisotropy of the electronic structure for the charge- and orbital-ordered state in half-doped manganite with layered structure.
We report on the in-plane anisotropy of the electronic response in the spin-, charge-, and orbital-ordered phase of a half-doped layered-structure manganite. The optical conductivity spectra for a single domain of Eu1/2Ca3/2MnO4 unambiguously show the anisotropic charge dynamics which well corresponds to the theoretical calculation: the optical conductivity with the polarization along the zigzag ferromagnetic chain direction exhibits a smaller gap and a larger intensity at lower energies than that of the perpendicular polarization mostly due to the charge and orbital ordering and the associated quantum interference effect.
Lee
Y S
YS
Spin Superstructure Project, ERATO, Japan Science and Technology Agency, Tsukuba 305-8562, Japan.
Onoda
S
S
Arima
T
T
Tokunaga
Y
Y
He
J P
JP
Kaneko
Y
Y
Nagaosa
N
N
Tokura
Y
Y