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- Title
PHASE DIAGRAM AND ELECTRONIC PROPERTIES OF HIGH-T[subc].
- Authors
Pavuna, Davor
- Abstract
We firstly briefly summarize some of the most relevant recent results and open questions across rather complex electronic phase diagram of cuprates. We continue with a discussion of results on thin superconducting oxide films grown by laser ablation. Systematic studies show that BSCCO-phases and LSCO-214 exhibit conductor-like Fermi edge, whereas materials containing "chains" (like YBCO-123) are prone to very rapid surface degradation, most likely related to critical oxygen loss at the outermost layers. Recently, direct ARPES dispersion measurements on in-situ grown, strained 10UC thin LSCO-214 films (T[sub c] = 44 K) have shown the band crossing of Fermi level well before the Brillouin zone boundary. This is in contrast to the flat band observed in unstrained single crystals — and to the band flattening predicted by band calculations for in-plane compressive strain. In spite of density of states reduction near the Fermi level, the critical temperature increases in strained films with respect to unstrained crystals; this poses further challenge to HTSC theory.
- Subjects
PHASE diagrams; SUPERCONDUCTORS; TEMPERATURE; LASER ablation
- Publication
Modern Physics Letters B, 2003, Vol 17, Issue 10-12, p393
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S021798490300541X