Electronic band structure of YBa2Cu4O8

✍ Scribed by Tamio Oguchi; Taizo Sasaki; Kiyoyuki Terakura

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 319 KB
• Volume: 172
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(90)90617-n

✦ Synopsis

We have performed local-density-functional band-structure calculations for a new high-To superconducting phase, YBa2Cu4Oa. General characteristics in the energy band are quite similar to those of YBa2CusOT. We have found a noticeable energy-level lowering of oxygen p-states at the chain and apex sites, which may explain the relative stability of the oxygen ions in YBa2Cu4Os. It is also suggested that, related to the energy-level lowering, a certain distinct difference in the Fermi surfaces should be observed for this new phase.