Prefer a chat interface with context about you and your work?
Calorimetric evidence of multiband superconductivity in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mtext>Ba</mml:mtext><mml:msub><mml:mrow><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:msub><mml:mrow><mml:mtext>Fe</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.925</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mtext>Co</mml:mtext></mml:mrow><mml:mrow><mml:mn>0.075</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mo>)</mml:mo></mml:mrow></mml:mrow><mml:…
We report on the determination of the electronic heat capacity of a slightly overdoped $(x=0.075)$ $\text{Ba}{({\text{Fe}}_{1\ensuremath{-}x}{\text{Co}}_{x})}_{2}{\text{As}}_{2}$ single crystal with a ${T}_{c}$ of 21.4 K. Our analysis of the temperature dependence of the superconducting-state specific heat provides strong evidence for a two-band $s$-wave order parameter with gap amplitudes $2{\ensuremath{\Delta}}_{1}(0)/{\text{k}}_{B}{\text{T}}_{c}=1.9$ and $2{\ensuremath{\Delta}}_{2}(0)/{\text{k}}_{B}{\text{T}}_{c}=4.4$.