Phys. Rev. B 35, 7216–7219 (1987)

Local tunneling measurements of the high-T_c superconductor La_2-xSr_xCuO_4-y

Abstract

References

Citing Articles (55)

Page Images

Download: PDF (167 kB) Buy this article Export: BibTeX or EndNote (RIS)

J. R. Kirtley, C. C. Tsuei, Sung I. Park, C. C. Chi, J. Rozen, and M. W. Shafer
IBM Thomas J. Watson Laboratory, Yorktown Heights, New York 10598

Received 26 February 1987; published in the issue dated 1 May 1987

We have measured the current-voltage (I-V) characteristics for tunneling into the superconducting layered copper oxide La_2-xSr_xCuO_4-y using a low-temperature scanning-tunneling microscope. The I-V curves were highly nonlinear, even at low voltages, with evidence for superconducting energy gaps Δ of several meV. Substantial variation of Δ was observed from measurement to measurement, with the largest being Δ∼7 meV, corresponding to 2Δ/k_BT_c∼4.5. .AE

URL:

http://link.aps.org/doi/10.1103/PhysRevB.35.7216

DOI:

10.1103/PhysRevB.35.7216

PACS:

74.50.+r, 74.70.-b, 74.70.Mq

About | Terms and Conditions | Subscriptions | Search | Help

Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.

Citation Search:

Phys. Rev. B 35, 7216–7219 (1987)

Local tunneling measurements of the high-Tc superconductor La2-xSrxCuO4-y

Local tunneling measurements of the high-T_c superconductor La_2-xSr_xCuO_4-y