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Cited by 458

The DOI matches its Crossref record; 26 of the 26 references it cites were found in a registry or an index.

Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+δ

Open access
Gomes, Kenjiro K., Pasupathy, Abhay N., Pushp, Aakash, Ono, Shimpei, Ando, Yoichi, Yazdani, Ali·2007·Nature
DOI 10.1038/nature05881
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Abstract

Pairing of electrons in conventional superconductors occurs at the superconducting transition temperature Tc, creating an energy gap Δ in the electronic density of states (DOS). In the high-Tc superconductors, a partial gap in the DOS exists for a range of temperatures above Tc (ref. 2). A key question is whether the gap in the DOS above Tc is associated with pairing, and what determines the temperature at which incoherent pairs form. Here we report the first spatially resolved measurements of gap formation in a high-Tc superconductor, measured on Bi2Sr2CaCu2O8+δ samples with different Tc values (hole concentration of 0.12 to 0.22) using scanning tunnelling microscopy. Over a wide range of doping from 0.16 to 0.22 we find that pairing gaps nucleate in nanoscale regions above Tc. These regions proliferate as the temperature is lowered, resulting in a spatial distribution of gap sizes in the superconducting state. Despite the inhomogeneity, we find that every pairing gap develops locally at a temperature Tp, following the relation 2Δ/kBTp = 7.9 ± 0.5. At very low doping (≤0.14), systematic changes in the DOS indicate the presence of another phenomenon, which is unrelated and perhaps competes with electron pairing. Our observation of nanometre-sized pairing regions provides the missing microscopic basis for understanding recent reports of fluctuating superconducting response above Tc in hole-doped high-Tc copper oxide superconductors.

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Metadata

Authors
Gomes, K. K., Pasupathy, A. N., Pushp, A., Ono, S., Ando, Y., & Yazdani, A.
Venue
Nature
Publisher
Springer Science and Business Media LLC
Published
2007-05
Volume
447
Issue
7144
Pages
569-572
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
DOI
10.1038/nature05881
OpenAlex
W2054860087
Cited by
458
References
26
FWCI
43.54
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+δ. https://app.cochat.ai/papers/10.1038/nature05881
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Gomes, K. K., Pasupathy, A. N., Pushp, A., Ono, S., Ando, Y., & Yazdani, A. (2007). Visualizing pair formation on the atomic scale in the high-Tc superconductor Bi2Sr2CaCu2O8+δ. Nature. https://doi.org/10.1038/nature05881

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