Critical magnetic fields in the superconducting state of <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">K</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span><span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">C</mi></mrow><mrow><mn>60</mn></mrow></msub></mrow></math></span>

K. Holczer; O. Klein; G. Grüner; J. D. Thompson; F. Diederich; R. L. Whetten

doi:10.1103/PhysRevLett.67.271

Critical magnetic fields in the superconducting state of $K_{3}$ $C_{60}$

K. Holczer, O. Klein, G. Grüner, J. D. Thompson, F. Diederich, and R. L. Whetten

Phys. Rev. Lett. 67, 271 – Published 8 July 1991

Abstract

We have measured the temperature dependence of the lower and upper critical fields in superconducting $K_{3}$ $C_{60}$ . From the measurements, we have evaluated the penetration depth (λ=2400 Å) and superconducting coherence length (ξ=26 Å). The parameters are in agreement with a superconducting state formed by a narrow band.