Journal Article

PUBDB-2015-01172

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Low Temperature Anharmonicity and Superconductivity in Cuprates

Menushenkov, A. (Corresponding Author)>Extern* ; Kuznetsov, A. V. ; Chernikov, R.DESY* ; Ivanov, A. ; Sidorov, V.>Extern* ; Klementiev, K.>Extern*

2014
Springer New York, NY

This record in other databases:    

Please use a persistent id in citations: doi:10.1007/s10948-013-2411-1

Abstract: Temperature-dependent X-ray absorption spectra of the hole-doped $La_{2−x}Sr_{x} CuO_{4}$ and electron-doped $Nd_{2−x} Ce _{x} CuO_{4−\delta}$ high-temperature superconductors were investigated above the Cu K absorption edge. We observed strong anharmonicity in the superconductive $CuO_{2}$ plane. For x=0.15 it was shown that part of oxygen ions oscillate in a double-well potential and their vibrations are correlated with the local electron (hole) pair transfer. We suppose that at a low temperature the phase coherence of the local pair movement is determined by the peculiarities of the perovskite-like structure which includes the stiff $CuO_{n}$ (n = 4,6) complexes combined by collective rotational and breathing modes.

Note: (c) Springer Science+Business Media New York. Post referee full text in progress.

---

Contributing Institute(s):

1. DOOR-User (DOOR)
2. PETRA III Extension (FS-PEX)

Research Program(s):

1. DORIS Beamline C (POF2-54G13) (POF2-54G13)
2. DORIS Beamline E4 (POF2-54G13) (POF2-54G13)

Experiment(s):

1. DORIS Beamline C (DORIS III)
2. DORIS Beamline E4 (DORIS III)

Appears in the scientific report 2014

---

Database coverage:
Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---