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3 results on '"Dulguun, T."'

1. Unconventional multiband superconductivity with nodes in single-crystalline SrFe2(As_0.65P_0.35)2 as seen via 31P-NMR and specific heat

Author

Dulguun, T., Mukuda, H., Kobayashi, T., Engetsu, F., Kinouchi, H., Yashima, M., Kitaoka, Y., Miyasaka, S., and Tajima, S.

Subjects
Condensed Matter - Superconductivity
Abstract

We report 31P-NMR and specific heat measurements on an iron (Fe)-based superconductor SrFe2(As0.65P0.35)2 with Tc=26 K, which have revealed the development of antiferromagnetic correlations in the normal state and the unconventional superconductivity(SC) with nodal gap dominated by the gapless low-lying quasiparticle excitations. The results are consistently argued with an unconventional multiband SC state with the gap-size ratio of different bands being significantly large; the large full gaps in s\pm-wave state keep Tc high, whereas a small gap with a nodal-structure causes gapless feature under magnetic field. The present results will develop an insight into the strong material dependence of SC-gap structure in Fe-based superconductors., Comment: 6 pages, 5 figures, 1 table

Published
2011
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3. Unconventional multiband superconductivity with nodes in single-crystalline SrFe2(As0.65P0.35)2 as seen via 31P NMR and specific heat.

Author

Dulguun, T., Mukuda, H., Kobayashi, T., Engetsu, F., Kinouchi, H., Yashima, M., Kitaoka, Y., Miyasaka, S., and Tajima, S.

Subjects
*SUPERCONDUCTIVITY, *SINGLE crystals, *NUCLEAR magnetic resonance, *SPECIFIC heat, *ANTIFERROMAGNETISM, *QUASIPARTICLES
Abstract

We report 31P-NMR and specific-heat measurements on an iron (Fe) based superconductor SrFe2(As0.65P0.35)2 with Tc = 26 K, which have revealed the development of antiferromagnetic correlations in the normal state and unconventional superconductivity (SC) with the nodal gap dominated by the gapless low-lying quasiparticle excitations. The results are consistently argued with an unconventional multiband SC state with the gap-size ratio of different bands being significantly large; the large full gaps in the s±-wave state keep Tc high, whereas a small gap with a nodal structure causes a gapless feature under magnetic field. The present results will help develop insight into the strong material dependence of the SC gap structure in Fe-based superconductors. [ABSTRACT FROM AUTHOR]

Published
2012
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