Nodeless superconductivity and the peak effect in the quasiskutterudites Lu3Os4Ge13 and Y3Ru4Ge13
| Autor: | Yuntian Chen, Z. F. Weng, Om Prakash, Huiqiu Yuan, Yong-Ju Zhang, S. Ramakrishnan, G. M. Pang, Michael Smidman |
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| Rok vydání: | 2017 |
| Předmět: |
Physics
Superconductivity Condensed matter physics London penetration depth 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Superfluidity Electrical resistivity and conductivity Condensed Matter::Superconductivity 0103 physical sciences Stannide Isostructural 010306 general physics 0210 nano-technology Penetration depth Phase diagram |
| Zdroj: | Physical Review B. 95 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.95.184501 |
| Popis: | We report an investigation of the superconducting states of ${\mathrm{Lu}}_{3}{\mathrm{Os}}_{4}{\mathrm{Ge}}_{13}$ and ${\mathrm{Y}}_{3}{\mathrm{Ru}}_{4}{\mathrm{Ge}}_{13}$ single crystals by measurements of the electrical resistivity, ac susceptibility, and London penetration depth. The analysis of the penetration depth and the derived superfluid density indicates the presence of nodeless superconductivity and suggests that there are multiple superconducting gaps in both materials. Furthermore, ac susceptibility measurements of both compounds display the peak effect in the low-temperature region of the $H\text{\ensuremath{-}}T$ phase diagram. This anomalous increase of the critical current with field gives an indication of a change of the arrangement of flux lines in the mixed state, as found in some of the isostructural stannide materials. |
| Databáze: | OpenAIRE |
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