The optical properties of the doped holes in Bi2Sr2(Ca,Nd)Cu2O8+δ and (Nd,Sr)CoO3

✍ Scribed by I. Terasaki; T. Nakahashi; S. Takebayashi; A. Maeda; K. Uchinokura

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 390 KB
• Volume: 165-166
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/s0921-4526(09)80211-1

✦ Synopsis

The optical reflectivity spectra of Bi2Sr2(Ca,Nd)Cu208+5 and (Nd,Sr)CoOa were measured in the range from 0.03 to 3 eV, and transformed to the optical conductivity through the Kramers-Kronig relation. The obtained conductivity spectra for doped samples have a broad absorption in the mid-infrared region for both systems. The broad absorption shifts to 0 eV with doping in Bi-based cuprates, while it stays constant near 0.3 eV in (Nd,Sr)CoOa. The electronic states of high-To cup rates and Co oxides are discussed by comparing the obtained spectra of the two materials.