DOI: 10.1126/science.1134742. The Ground State of the Pseudogap in Cuprate Superconductors

The Ground State of the Pseudogap in Cuprate Superconductors

10.1126/science.1134742

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

We present studies of the electronic structure of La 2–x Ba x CuO 4 , a system where the superconductivity is strongly suppressed as static spin and charge orders or “stripes” develop near the doping level of x = ⅛. Using angle-resolved photoemission and scanning tunneling microscopy, we detect an energy gap at the Fermi surface with magnitude consistent with d -wave symmetry and with linear density of states, vanishing only at four nodal points, even when superconductivity disappears at x = ⅛. Thus, the nonsuperconducting, striped state at x = ⅛ is consistent with a phase-incoherent d -wave superconductor whose Cooper pairs form spin-charge–ordered structures instead of becoming superconducting.

Bibliography

Valla, T., Fedorov, A. V., Lee, J., Davis, J. C., & Gu, G. D. (2006). The Ground State of the Pseudogap in Cuprate Superconductors. Science, 314(5807), 1914â1916.

Authors 5

T. Valla (first)
A. V. Fedorov (additional)
Jinho Lee (additional)
J. C. Davis (additional)
G. D. Gu (additional)

References 33 Referenced 228

10.1088/0034-4885/62/1/002
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E. W. Carlson V. J. Emery S. A. Kivelson D. Orgad The Physics of Superconductivity: Conventional and Unconventional vol. 2 K. H. Benneman J. B. Ketterson Eds. (Springer Berlin 2003).
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The authors thank P. Anderson A. Chubukov E. Fradkin C. Homes P. Johnson S. Kivelson W. Ku A. Millis Z. Tešanović A. Tsvelik and J. Tranquada for useful discussions and Z-H. Pan for technical help. T.V. A.V.F. and G.D.G. are supported by the Office of Science U.S. Department of Energy (DOE). J.C.D and J.L. are supported by the Office of Science DOE the Office of Naval Research and by Cornell University.

Dates

Type	When
Created	18 years, 9 months ago (Nov. 16, 2006, 8:59 p.m.)
Deposited	1 year, 7 months ago (Jan. 10, 2024, 5:02 a.m.)
Indexed	2 weeks, 1 day ago (Aug. 7, 2025, 4:29 p.m.)
Issued	18 years, 8 months ago (Dec. 22, 2006)
Published	18 years, 8 months ago (Dec. 22, 2006)
Published Print	18 years, 8 months ago (Dec. 22, 2006)

Funders 0

None

BibTeX

@article{Valla_2006, title={The Ground State of the Pseudogap in Cuprate Superconductors}, volume={314}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1134742}, DOI={10.1126/science.1134742}, number={5807}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Valla, T. and Fedorov, A. V. and Lee, Jinho and Davis, J. C. and Gu, G. D.}, year={2006}, month=dec, pages={1914–1916} }

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