Magnetic penetration depth and condensate density of cuprate high-Tc superconductors determined by muon-spin-rotation experiments

C. Bernhard; Ch. Niedermayer; U. Binninger; A. Hofer; Ch. Wenger; J. L. Tallon; G. V. M. Williams; E. J. Ansaldo; J. I. Budnick; C. E. Stronach; D. R. Noakes; M. A. Blankson-Mills

doi:10.1103/PhysRevB.52.10488

Magnetic penetration depth and condensate density of cuprate high-Tc superconductors determined by muon-spin-rotation experiments

C. Bernhard, Ch. Niedermayer, U. Binninger, A. Hofer, Ch. Wenger, J. L. Tallon, G. V. M. Williams, E. J. Ansaldo, J. I. Budnick, C. E. Stronach, D. R. Noakes, M. A. Blankson-Mills

DOI 10.1103/PhysRevB.52.10488 · Physical Review B

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Abstract

We summarize our results of transverse-field muon-spin-relaxation (TF-μSR) experiments on a variety of polycrystalline cuprate high-Tc superconducting systems. In this paper we present the conditions under which the μSR depolarization rate at low temperatures σ0∝λab−2(0)∝ns(0)/mab* is determined in a unique way by the doping state of CuO2 planes and the consequent critical temperature Tc. Disorder and pinning effects due to various sorts and amounts of dopant atoms do not affect σ0. From our results on YBa2Cu3O7−δ, YBa2Cu4O8, and Y2Ba4Cu7O15−δ (systems having both planes and chains) we conclude that a superconducting condensate is not only formed in the CuO2 planes but is induced additionally in the CuO chains. This chain condensate is rapidly suppressed by any disorder in the chains and depends strongly on the oxygen ordering.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YBa2Cu4O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y2Ba4Cu7O15-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Tl2Ba2CuO6+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
(Y,Yb)1-xCaxBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Y0.8Ca0.2Ba2Cu3O6.96 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	51	Pressure not reported	unknown