Low-temperature magnetothermal transport investigation of a Ni-based superconductor BaNi2As2: evidence for fully gapped superconductivity

Low-temperature magnetothermal transport investigation of a Ni-based superconductor BaNi2As2: evidence for fully gapped superconductivity

We have performed low-temperature specific heat and thermal conductivity measurements of the Ni-based superconductor BaNi2As2 (T{c}=0.7 K) in a magnetic field. In a zero field, thermal conductivity shows T-linear behavior in the normal state and exhibits a BCS-like exponential decrease below T{c}. T...

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Veröffentlicht in:Physical review letters 2009-04, Vol.102 (14), p.147004-147004
Hauptverfasser: Kurita, N, Ronning, F, Tokiwa, Y, Bauer, E D, Subedi, A, Singh, D J, Thompson, J D, Movshovich, R
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container_end_page 147004
container_issue 14
container_start_page 147004
container_title Physical review letters
container_volume 102
creator Kurita, N
Ronning, F
Tokiwa, Y
Bauer, E D
Subedi, A
Singh, D J
Thompson, J D
Movshovich, R
description We have performed low-temperature specific heat and thermal conductivity measurements of the Ni-based superconductor BaNi2As2 (T{c}=0.7 K) in a magnetic field. In a zero field, thermal conductivity shows T-linear behavior in the normal state and exhibits a BCS-like exponential decrease below T{c}. The field dependence of the residual thermal conductivity extrapolated to zero temperature is indicative of a fully gapped superconductor. This conclusion is supported by the analysis of the specific heat data, which are well fit by the BCS temperature dependence from T{c} down to the lowest temperature of 0.1 K.
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title Low-temperature magnetothermal transport investigation of a Ni-based superconductor BaNi2As2: evidence for fully gapped superconductivity
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