This title appears in the Scientific Report :
2011
Please use the identifier:
http://dx.doi.org/10.1063/1.3660321 in citations.
Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe(0.926)Co(0.074))(2)As(2) single crystal
Millimeter-wave study of London penetration depth temperature dependence in Ba(Fe(0.926)Co(0.074))(2)As(2) single crystal
In-plane surface Ka-band microwave impedance of optimally doped single crystals of the Fe-based superconductor Ba(Fe0.926Co0.074)(2)As-2 (T-c = 22.8 K) was measured. Sensitive sapphire disk quasi-optical resonator with high-T-c cuprate conducting endplates was developed specially for Fe-pnictide sup...
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Personal Name(s): | Barannik, A.A. |
---|---|
Cherpark, N.T. / Ni, N. / Tanatar, M.A. / Vitusevich, S.A. / Skesanov, V.N. / Canfield, P.C. / Prozorov, R. / Glamazdin, V.V. / Torokhtii, K.I. | |
Contributing Institute: |
Bioelektronik; PGI-8 JARA-FIT; JARA-FIT |
Published in: | Low temperature physics, 37 (2011) S. 725 - 728 |
Imprint: |
College Park, Md.
Inst.
2011
|
Physical Description: |
725 - 728 |
DOI: |
10.1063/1.3660321 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Low Temperature Physics
37 |
Subject (ZB): | |
Publikationsportal JuSER |
In-plane surface Ka-band microwave impedance of optimally doped single crystals of the Fe-based superconductor Ba(Fe0.926Co0.074)(2)As-2 (T-c = 22.8 K) was measured. Sensitive sapphire disk quasi-optical resonator with high-T-c cuprate conducting endplates was developed specially for Fe-pnictide superconductors. It allowed finding temperature variation of London penetration depth in a form of power law, namely Delta lambda(T) similar to T-n with n = 2.8 from low temperatures up to at least 0.6T(c) consisted with radio-frequency measurements. This exponent points towards nodeless state with pairbreaking scattering, which can support one of the extended s-pairing symmetries. The dependence lambda(T) at low temperatures is well described by one superconducting small-gap (Delta congruent to 0.75 in kT(c) units, where k is Boltzmann coefficient) exponential dependence. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3660321] |