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research
Magnetic excitations and phonons simultaneously studied by resonant inelastic x-ray scattering in optimally doped Bi
1.5
_{1.5}
1.5
​
Pb
0.55
_{0.55}
0.55
​
Sr
1.6
_{1.6}
1.6
​
La
0.4
_{0.4}
0.4
​
CuO
6
+
δ
_{6+\delta}
6
+
δ
​
Authors
A. Amorese
L. Braicovich
+14Â more
N. B. Brookes
G. Dellea
T. P. Devereaux
H. Eisaki
G. Ghiringhelli
M. Hashimoto
W. -S. Lee
M. Minola
Y. Y. Peng
M. Moretti Sala
T. Schmitt
Z. -X. Shen
Y. Yoshida
K. -J. Zhou
Publication date
1 January 2015
Publisher
'American Physical Society (APS)'
Doi
Cite
View
on
arXiv
Abstract
Magnetic excitations in the optimally doped high-
T
c
T_\mathrm{c}
T
c
​
superconductor Bi
1.5
_{1.5}
1.5
​
Pb
0.55
_{0.55}
0.55
​
Sr
1.6
_{1.6}
1.6
​
La
0.4
_{0.4}
0.4
​
CuO
6
+
δ
_{6+\delta}
6
+
δ
​
(OP-Bi2201,
T
c
≃
34
T_\mathrm{c}\simeq 34
T
c
​
≃
34
K) are investigated by Cu
L
3
L_3
L
3
​
edge resonant inelastic x-ray scattering (RIXS), below and above the pseudogap opening temperature. At both temperatures the broad spectral distribution disperses along the (1,0) direction up to
∼
\sim
∼
350~meV at zone boundary, similarly to other hole-doped cuprates. However, above
∼
\sim
∼
0.22 reciprocal lattice units, we observe a concurrent intensity decrease for magnetic excitations and quasi-elastic signals with weak temperature dependence. This anomaly seems to indicate a coupling between magnetic, lattice and charge modes in this compound. We also compare the magnetic excitation spectra near the anti-nodal zone boundary in the single layer OP-Bi2201 and in the bi-layer optimally doped Bi
1.5
_{1.5}
1.5
​
Pb
0.6
_{0.6}
0.6
​
Sr
1.54
_{1.54}
1.54
​
CaCu
2
_2
2
​
O
8
+
δ
_{8+\delta}
8
+
δ
​
(OP-Bi2212,
T
c
≃
96
T_\mathrm{c}\simeq96
T
c
​
≃
96
K). The strong similarities in the paramagnon dispersion and in their energy at zone boundary indicate that the strength of the super-exchange interaction and the short-range magnetic correlation cannot be directly related to
T
c
T_\mathrm{c}
T
c
​
, not even within the same family of cuprates
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Archivio istituzionale della ricerca - Politecnico di Milano
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oai:re.public.polimi.it:11311/...
Last time updated on 12/11/2016
Crossref
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info:doi/10.1103%2Fphysrevb.92...
Last time updated on 16/02/2019