Temperature dependence of the magnetic penetration depth in the high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Y</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>9</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>: Evidence for conventional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>s</mml:mi></mml:math>-wave pairing

Dale R. Harshman; G. Aeppli; E. J. Ansaldo; B. Batlogg; J. H. Brewer; J. F. Carolan; R. J. Cava; M. Celio; A.C.D. Chaklader; W. N. Hardy; S. R. Kreitzman; G. M. Luke; D. R. Noakes; M. Senba

doi:10.1103/physrevb.36.2386

Temperature dependence of the magnetic penetration depth in the high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>T</mml:mi></mml:mrow><mml:mrow><mml:mi>c</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>superconductor<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ba</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant="normal">Y</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">O</mml:mi></mml:mrow><mml:mrow><mml:mn>9</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>: Evidence for conventional<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>s</mml:mi></mml:math>-wave pairing

Dale R. Harshman(AT&T (United States)), G. Aeppli(AT&T (United States)), E. J. Ansaldo(AT&T (United States)), B. Batlogg(AT&T (United States)), J. H. Brewer(University of British Columbia), J. F. Carolan(University of British Columbia), R. J. Cava(AT&T (United States)), M. Celio(TRIUMF), A.C.D. Chaklader(University of British Columbia), W. N. Hardy(University of British Columbia), S. R. Kreitzman(AT&T (United States)), G. M. Luke(University of British Columbia), D. R. Noakes(University of British Columbia), M. Senba(AT&T (United States))

Physical review. B, Condensed matter

August 1, 1987

10.1103/physrevb.36.2386

Cited by 266

Abstract

Transverse-field muon-spin-relaxation ($\ensuremath{\mu}\mathrm{SR}$) measurements have been performed on ${\mathrm{Ba}}_{2}\mathrm{Y}{\mathrm{Cu}}_{3}{\mathrm{O}}_{9\ensuremath{-}\ensuremath{\delta}}$ ($\ensuremath{\delta}=2.1\ifmmode\pm\else\textpm\fi{}0.05$) above and below its superconducting transition temperature. The temperature dependence of the magnetic penetration depth, deduced from the $\ensuremath{\mu}\mathrm{SR}$ data, is that of an ordinary $s$-wave (not $d$-wave with nodes in the gap function) superconductor. The data at 6 K indicate a magnetic penetration depth of $\ensuremath{\lambda}\ensuremath{\approx}1400$ \AA{} which, in the limit of extreme anisotropy, reduces to $\ensuremath{\lambda}\ensuremath{\approx}1065$ \AA{}.

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