Abstract
We present a magnetic-penetration-depth study on polycrystalline and granular samples of SrPtAs, a pnictide superconductor with a hexagonal structure containing PtAs layers that individually break inversion symmetry (local noncentrosymmetry). Compact samples show a clear-cut s-wave-type BCS behavior, which we consider to be the intrinsic penetration depth of SrPtAs. Granular samples display a sample-dependent second diamagnetic drop, attributed to the intergrain coupling. Our experimental results point to a nodeless isotropic superconducting energy gap in SrPtAs, which puts strong constraints on the driven mechanism for superconductivity and the order parameter symmetry of this compound.
| Original language | English |
|---|---|
| Article number | 064504 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 93 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Feb 2 2016 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
High-resolution magnetic penetration depth and inhomogeneities in locally noncentrosymmetric SrPtAs. / Landaeta, J. F.; Taylor, S. V.; Bonalde, I.; Rojas, C.; Nishikubo, Y.; Kudo, Kazutaka; Nohara, Minoru.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 93, No. 6, 064504, 02.02.2016.Research output: Contribution to journal › Article
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TY - JOUR
T1 - High-resolution magnetic penetration depth and inhomogeneities in locally noncentrosymmetric SrPtAs
AU - Landaeta, J. F.
AU - Taylor, S. V.
AU - Bonalde, I.
AU - Rojas, C.
AU - Nishikubo, Y.
AU - Kudo, Kazutaka
AU - Nohara, Minoru
PY - 2016/2/2
Y1 - 2016/2/2
N2 - We present a magnetic-penetration-depth study on polycrystalline and granular samples of SrPtAs, a pnictide superconductor with a hexagonal structure containing PtAs layers that individually break inversion symmetry (local noncentrosymmetry). Compact samples show a clear-cut s-wave-type BCS behavior, which we consider to be the intrinsic penetration depth of SrPtAs. Granular samples display a sample-dependent second diamagnetic drop, attributed to the intergrain coupling. Our experimental results point to a nodeless isotropic superconducting energy gap in SrPtAs, which puts strong constraints on the driven mechanism for superconductivity and the order parameter symmetry of this compound.
AB - We present a magnetic-penetration-depth study on polycrystalline and granular samples of SrPtAs, a pnictide superconductor with a hexagonal structure containing PtAs layers that individually break inversion symmetry (local noncentrosymmetry). Compact samples show a clear-cut s-wave-type BCS behavior, which we consider to be the intrinsic penetration depth of SrPtAs. Granular samples display a sample-dependent second diamagnetic drop, attributed to the intergrain coupling. Our experimental results point to a nodeless isotropic superconducting energy gap in SrPtAs, which puts strong constraints on the driven mechanism for superconductivity and the order parameter symmetry of this compound.
UR - http://www.scopus.com/inward/record.url?scp=84958214483&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84958214483&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.93.064504
DO - 10.1103/PhysRevB.93.064504
M3 - Article
AN - SCOPUS:84958214483
VL - 93
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 6
M1 - 064504
ER -