- Tytuł:
- "Ridge" Fermi Surface Study in Metallic (R)Ba$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ (R = Y, Dy) and in Oxygen Deficient YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ by Positron Annihilation
- Autorzy:
-
Hoffmann, L.
Manuel, Α. A.
Barbiellini, B.
Peter, Μ.
Shukla, A.
Walker, E. - Powiązania:
- https://bibliotekanauki.pl/articles/1933509.pdf
- Data publikacji:
- 1995-07
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
74.72.Jt
74.72.Βk
71.25.Ηc
78.70.Bj - Opis:
- We present a detailed positron 2D-ACAR measurements study of the "ridge" Fermi surface of (R)Ba$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$ (R = Y, Dy) compared to full-potential linearized augmented plane wave and linear muffin-tin orbital calculations. From different 2D-ACAR projections measured in DyBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$, a 3D model of the momentum density of the ridge was established and is in good agreement with LMTO calculations of YΒa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$, confirming the description of the ridge Fermi surface by local density approximation calculations. The ridge is also studied in oxygen deficient YΒa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7-δ}$. With growing δ, the ridge disappears without changing in width. This is consistent with full-potential linearized augmented plane wave calculations of YΒa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{6.5}$, and supports the phase separation model of Mesot et al.
- Źródło:
-
Acta Physica Polonica A; 1995, 88, 1; 147-161
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł