TY - JOUR
T1 - Effects of superconductivity and charge order on the subterahertz reflectivity of La1.875 Ba0.125-y Sry Cu O4
AU - Ortolani, M.
AU - Calvani, P.
AU - Lupi, S.
AU - Schade, U.
AU - Perla, A.
AU - Fujita, M.
AU - Yamada, K.
PY - 2006
Y1 - 2006
N2 - The reflectivity R (ω) of both the ab plane and the c axis of two single crystals of La1.875 Ba0.125-y Sry Cu O4 has been measured down to 5 cm-1, using coherent synchrotron radiation below 30 cm-1. For y=0.085, a Josephson plasma resonance is detected at T Tc =31 K in the out-of-plane Rc (ω), and a far-infrared peak (FIP) appears in the in-plane optical conductivity σab (ω) below 50 K, where nonstatic charge ordering (CO) is reported by x-ray scattering. For y=0.05 (Tc =10 K), below the ordering temperature TCO, a FIP is again observed in σab (ω). The FIP then appears to be an infrared signature of CO, either static or fluctuating, as reported in previous work on the La-Sr cuprates.
AB - The reflectivity R (ω) of both the ab plane and the c axis of two single crystals of La1.875 Ba0.125-y Sry Cu O4 has been measured down to 5 cm-1, using coherent synchrotron radiation below 30 cm-1. For y=0.085, a Josephson plasma resonance is detected at T Tc =31 K in the out-of-plane Rc (ω), and a far-infrared peak (FIP) appears in the in-plane optical conductivity σab (ω) below 50 K, where nonstatic charge ordering (CO) is reported by x-ray scattering. For y=0.05 (Tc =10 K), below the ordering temperature TCO, a FIP is again observed in σab (ω). The FIP then appears to be an infrared signature of CO, either static or fluctuating, as reported in previous work on the La-Sr cuprates.
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U2 - 10.1103/PhysRevB.73.184508
DO - 10.1103/PhysRevB.73.184508
M3 - Article
AN - SCOPUS:33646423811
SN - 0163-1829
VL - 73
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 18
M1 - 184508
ER -