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research
Underlying Fermi surface of Sr
14
β
x
_{14-x}
14
β
x
β
Ca
x
_x
x
β
Cu
24
_{24}
24
β
O
41
_{41}
41
β
in two-dimensional momentum space observed by angle-resolved photoemission spectroscopy
Authors
H. Eisaki
A. Fujimori
+5Β more
Z. Hussain
Z. -X. Shen
S. Uchida
T. Yoshida
X. J. Zhou
Publication date
17 March 2009
Publisher
'American Physical Society (APS)'
Doi
Cite
View
on
arXiv
Abstract
We have performed an angle-resolved photoemission study of the two-leg ladder system Sr
14
β
x
_{14-x}
14
β
x
β
Ca
x
_x
x
β
Cu
24
_{24}
24
β
O
41
_{41}
41
β
with
x
x
x
= 0 and 11. "Underlying Fermi surfaces" determined from low energy spectral weight mapping indicates the quasi-one dimensional nature of the electronic structure. Energy gap caused by the charge density wave has been observed for
x
x
x
=0 and the gap tends to close with Ca substitution. The absence of a quasi-particle peak even in
x
x
x
=11 is in contrast to the two-dimensional high-
T
c
T_c
T
c
β
cuprates, implying strong carrier localization related to the hole crystalization.Comment: 5 pages, 3 figure
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Last time updated on 02/01/2020