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Science 28 September 2001:
Vol. 293. no. 5539, pp. 2430 - 2432
DOI: 10.1126/science.1064204
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Reports
Field-Induced Superconductivity in a Spin-Ladder Cuprate
J. H. Schön,12*
M. Dorget,34
F. C. Beuran,4
X. Z. Xu,4
E. Arushanov,45
M. Laguës,4
C. Deville Cavellin34
We report on the modulation of the transport properties
of thin films, grown by molecular beam epitaxy, of the spin-ladder compound [CaCu2O3]4, using the
field effect in a gated structure. At high hole-doping levels,
superconductivity is induced in the nominally insulating ladder
material without the use of high-pressure or chemical substitution. The
observation of superconductivity is in agreement with the theoretical
prediction that holes doped into spin ladders could pair and possibly
superconduct.
1 Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974-0636, USA.
2 University of Konstanz, Department of Physics,
Post Office Box X916, D-78457 Konstanz, Germany.
3 Groupe de Physique des Milieux Denses,
Université Paris XII, 61 Avenue du Général de Gaulle,
94010 Créteil Cedex, France.
4 Surfaces et
Supraconducteurs CNRS UPR5-ESPCI, 10 Rue Vauquelin, 75005 Paris,
France.
5 Institute of Applied Physics, Academy of
Sciences of the Moldova Republic, Academiei str. 5, Kishinev 277028, Moldova.
*
To whom correspondence should be addressed. E-mail:
j.hendrix{at}ratskrone.de
Read the Full Text
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
- Superconductivity in a Spin-Ladder Cuprate.
- N. J. C. Ingle, M. R. Beasley, T. H. Geballe, J. H. Schon, M. Dorget, F. C. Beuran, X. Z. Xu, E. Arushanov, M. Lagues, and C. D. Cavellin (2002)
Science
295, 1967a
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