Experimental Electronic Structure Studies of the High-Temperature Superconductors $La_{2-x}Sr_{x}CuO_{4}$ and $Ba_{2}GdCu_{3}O_{7-y}$

Content Provider	Scilit
Author	Nücker, N. Fink, J. Renker, B. Ewert, D. Weijs, P. J. W. Fuggle, J. C.
Copyright Year	1987
Description	Journal: Japanese Journal of Applied Physics X-ray induced photoelectron spectroscopy (XPS), bremsstrahlung-isochromat spectroscopy (BIS), and electron energy-loss spectroscopy (EELS) were used to investigate the electronic structure of $La_{2-x}Sr_{x}CuO_{4}$. The samples with x=0 show near the Fermi energy a smeared out gap or very low density of states in a region of ∼2 eV. Upon replacement of La by Sr, this gap is filled with defect states, the intensity of which is proportional to x. Similar spectra were observed for $Ba_{2}GdCu_{3}O_{7-y}$ $(T_{C}$=94K). This may indicate, that the density of states near $E_{F}$ in this compound may be related to defects on the O sites too.
Related Links	http://iopscience.iop.org/article/10.7567/JJAPS.26S3.1015/pdf
ISSN	00214922
e-ISSN	13474065
DOI	10.7567/jjaps.26s3.1015
Journal	Japanese Journal of Applied Physics
Issue Number	S3-2
Volume Number	26
Language	English
Publisher	IOP Publishing
Publisher Date	1987-01-01
Access Restriction	Open
Subject Keyword	Journal: Japanese Journal of Applied Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering