Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor

R. Khasanov; P. W. Klamut; A. Shengelaya; Z. Bukowski; I. M. Savic; C. Baines; H. Keller

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Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor

机译：Mo_3Sb_7超导体穿透深度的μ自旋旋转测量

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Measurements of the magnetic-field penetration depth λ in superconductor Mo_3Sb_7 (T_c≈ 2.1 K) were carried out by means of muon-spin rotation. The absolute values of λ, the Ginzburg-Landau parameter k, and the first H_(c1) and the second H_(c2) critical fields at T=0 are λ(0)=720(100) nm, κ(0)=55(10), μ_0H_(c1)(0) = 1.8(3) mT, and μ_0H_(c2)(0) = 1.9(2) T. The zero-temperature value of the superconducting energy gap A(0) was found to be 0.35(1) meV, corresponding to the ratio 2△(0)//k_BT_c=3.83(10). At low temperatures λ~(-2)(T) saturates and becomes constant below T approx= 0.3T_c, in agreement with what is expected for s-wave BCS superconductors. Our results suggest that Mo_3Sb_7 is a superconductor with the single isotropic energy gap.

机译：超导体Mo_3Sb_7（T_c≈2.1 K）中的磁场穿透深度λ的测量是通过介子自旋旋转进行的。 λ，Ginzburg-Landau参数k以及T = 0时的第一H_（c1）和第二H_（c2）临界场的绝对值为λ（0）= 720（100）nm，κ（0）= 55（10），μ_0H_（c1）（0）= 1.8（3）mT和μ_0H_（c2）（0）= 1.9（2）T.发现超导能隙A（0）的零温度值为0.35（1）meV，对应于比率2△（0）// k_BT_c = 3.83（10）。在低温下，λ〜（-2）（T）饱和并在T大约= 0.3T_c以下变得恒定，这与s波BCS超导体的预期一致。我们的结果表明，Mo_3Sb_7是具有单个各向同性能隙的超导体。

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《Physical review》 |2008年第1期|671-675|共5页
作者
R. Khasanov; P. W. Klamut; A. Shengelaya; Z. Bukowski; I. M. Savic; C. Baines; H. Keller;
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metals; alloys and binary compounds (including A15, MgB2, etc.); mixed states, critical fields, and surface sheaths; magnetic properties; muon spin rotation and relaxation;

机译：金属;合金和二元化合物（包括A15;MgB2等）;混合态;临界场和表面鞘;磁性介子旋转和松弛;

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Muon-spin rotation measurements of the penetration depth of the Mo_3Sb_7 superconductor

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