Oxygen hole pairing in CuO2 planes : a quasi-one dimensional case
作者： D. Feinberg , M. Avignon , M. Boiron , B.K. Chakraverty
DOI: 10.1051/ANPHYS:01988001305044700
关键词: Density of states 、 Physics 、 Coupling constant 、 BCS theory 、 Condensed matter physics 、 Cooper pair 、 Pairing 、 Doping 、 Electronic band structure 、 Transition temperature 、 General Physics and Astronomy
摘要: A possible mechanism of pairing oxygen holes produced on doping is investigated. These are formed due to strong correlation energy copper sites. In a simplified CuO2-sheet band structure, they showed take place in narrow p-oxygen originating from the broadening non-bonding level by direct O-O transfer. Such shows quasi-one-dimensional density states N (E) ∼ E- 1/2, which strongly enhances BCS-type pairing. Tc evaluated for both s and d varies as tλ 2 where λ coupling constant t transfer integral.
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