The reflectivity R(ω) of both the ab plane and the c axis of two single crystals of La1.875Ba0.125−ySryCuO4 has been measured down to 5cm−1, using coherent synchrotron radiation below 30cm−1. For y=0.085, a Josephson plasma resonance is detected at T⪡Tc=31K in the out-of-plane Rc(ω), and a far-infrared peak (FIP) appears in the in-plane optical conductivity σab(ω) below 50K, where nonstatic charge ordering (CO) is reported by x-ray scattering. For y=0.05 (Tc=10K), 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.

Effects of superconductivity and charge order on the subterahertz reflectivity of La1.875Ba0.125−ySryCuO4 / Ortolani, Michele; Calvani, Paolo; Lupi, Stefano; Schade, U.; Perla, A.; Fujita, M.; Yamada, K.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 73:(2006), pp. 184508-1-184508-8. [10.1103/PhysRevB.73.184508]

Effects of superconductivity and charge order on the subterahertz reflectivity of La1.875Ba0.125−ySryCuO4

ORTOLANI, MICHELE
Primo
Investigation
;
CALVANI, Paolo;LUPI, Stefano;
2006

Abstract

The reflectivity R(ω) of both the ab plane and the c axis of two single crystals of La1.875Ba0.125−ySryCuO4 has been measured down to 5cm−1, using coherent synchrotron radiation below 30cm−1. For y=0.085, a Josephson plasma resonance is detected at T⪡Tc=31K in the out-of-plane Rc(ω), and a far-infrared peak (FIP) appears in the in-plane optical conductivity σab(ω) below 50K, where nonstatic charge ordering (CO) is reported by x-ray scattering. For y=0.05 (Tc=10K), 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.
2006
Charge ordering
01 Pubblicazione su rivista::01a Articolo in rivista
Effects of superconductivity and charge order on the subterahertz reflectivity of La1.875Ba0.125−ySryCuO4 / Ortolani, Michele; Calvani, Paolo; Lupi, Stefano; Schade, U.; Perla, A.; Fujita, M.; Yamada, K.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 73:(2006), pp. 184508-1-184508-8. [10.1103/PhysRevB.73.184508]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/32340
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