<|begin_of_text|><|start_header_id|>system<|end_header_id|>

You are an expert at identifying data availability statements in scientific text. A data availability statement describes where research data can be found or how it can be accessed.<|eot_id|><|start_header_id|>user<|end_header_id|>

Determine if the following text contains a data availability statement. Answer with 'yes' or 'no'.

Text: Recent studies of the low - temperature electronic specific heat ( γ ) have added important insights . In the BaFe 2 - x Co x As 2 system , a systematic study of the SC portion of γ as a function of x has revealed a lack of any strong doping dependence , signifying no major change in the gap structure through the superconducting range of concentrations ; Gofryk et al . fit their data using a two - gap model , yielding a factor of two ratio between gap amplitudes that does not vary by more than 10 % through several Co concentrations [ 131 ] . The width of the SC transition at T c , however , does show a significant increase away from optimal doping . This may be in line with the conclusions from thermal conductivity measurements of weakened pairing strength away from optimal doping [ Reid ] . A more intriguing find involves measurements of γ in the T=0 limit in Ba(Fe 0.92 Co 0.08 ) 2 As 2 ( T c = 20 K ) [ 131 ] and BaFe 2 ( As 0.7 P 0.3 ) 2 ( T c = 30 K ) [ 132 ] , both of which report a sizeable residual contribution in the SC state that is ~20 % of the estimated normal state electronic contribution . This anomalous residual term is similar in nature to that observed in YBCO [ 133 ] and CeCoIn 5 [ 134 ] , both well - established to have nodal OP symmetry . However , the field dependence of γ in both FeSC systems does not follow the behavior expected to go along with nodal excitations , such as the well - known H 1/2<|eot_id|><|start_header_id|>assistant<|end_header_id|>

no<|eot_id|>