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24 April 2024 |
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Compositional Evolution of the Anti-phase Stripe Superstructure in Bi2Sr2-xLaxCuO6 (0<x<=1.1) Revealed by Transmission Electron Microscopy | | Z. Chen
; Y. Y. Peng
; Z. Wang
; Y. J. Song
; J. Q. Meng
; X. J. Zhou
; J. Q. Li
; | | Date: |
1 Mar 2013 | | Abstract: | The detailed structural properties of La-doped Bi2Sr2-xLaxCuO6 (La-Bi2201,
0<=x<=1.1) have been studied by transmission electron microscopy (TEM). The
well-known incommensurate supermodulation q1 in the Bi-based cuprates evolves
from a monoclinic superstructure in the pristine Bi2201 phase to an orthogonal
one in La-Bi2201(x=0.73) phase. The b-component of the modulation vector (q1)
for x=0.25 sample is about 0.24b* and increases slightly to 0.246b* in x=0.84
sample, while it increases significantly to 0.286b* for x=1.10 sample. We have
revealed a new anti-phase stripe superstructure in all the La-doped Bi2201
samples, giving rise to a new modulation with a vector q2. This q2 modulation
is directly evolved from the orthogonal modulation q1 through an addition of
the anti-phase structure so that its vector q2 equals to q1b/2. We also
discussed the implication of these structural studies on the electronic
structure by angle-resolved photoemission spectroscopy (ARPES) experiments in
La-Bi2201. | | Source: | arXiv, 1303.0111 | | Services: | Forum | Review | PDF | Favorites | |
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