Microscopic study of the superconducting state of the iron pnictide RbFe&lt;sub&gt;2&lt;/sub&gt;As&lt;sub&gt;2&lt;/sub&gt; via muon spin rotation

Shermadini, Z.; Kanter, J.; Baines, C.; Bendele, M.; Bukowski, Z.; Khasanov, R.; Klauss, H.-H.; Luetkens, H.; Maeter, H.; Pascua, G.; Batlogg, B.; Amato, A.

doi:10.1103/PhysRevB.82.144527

Microscopic study of the superconducting state of the iron pnictide RbFe₂As₂ via muon spin rotation

Shermadini Z, Kanter J, Baines C, Bendele M, Bukowski Z, Khasanov R, Klauss H-H, Luetkens H, Maeter H, Pascua G, Batlogg B & Amato A

Citation

Shermadini, Z., Kanter, J., Baines, C., Bendele, M., Bukowski, Z., Khasanov, R., … Amato, A. (2010). Microscopic study of the superconducting state of the iron pnictide RbFe₂As₂ via muon spin rotation. Physical Review B, 82(14), 144527 (5 pp.). https://doi.org/10.1103/PhysRevB.82.144527

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:15842

A study of the temperature and field dependence of the penetration depth λ of the superconductor RbFe₂As₂(T_c=2.52 K) was carried out by means of muon-spin rotation measurements. In addition to the zero-temperature value of the penetration depth λ(0)=267(5) nm, a determination of the upper critical field B_c2(0)=2.6(2) T was obtained. The temperature dependence of the superconducting carrier concentration is discussed within the framework of a multigap scenario. Compared to the other "122" systems which exhibit much higher Fermi level, a strong reduction in the large gap BCS ratio 2Δ/k_BT_c is observed. This is interpreted as a consequence of the absence of interband processes. Indications of possible pair-breaking effect are also discussed.