期刊
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
卷 78, 期 2, 页码 -出版社
PHYSICAL SOC JAPAN
DOI: 10.1143/JPSJ.78.023706
关键词
BaRh2P2; BaIr2P2; superconductivity; pnictide
Bulk Superconductivity was discovered in BaRh2P2 (T-c = 1.0 K) and BaIr2P2 (T-c = 2.1 K), which are isostructural to (Ba,K)Fe2As2, indicative of the appearance of superconductivity over a wide variety of layered transition metal pnictides, The electronic specific heat coefficient gamma in the normal state, 9.75 and 6.86 mJ/(mol K) for BaRh2P2 and BaIr2P2 respectively, indicate that the electronic density of states of these two compounds are moderately large but smaller than those of Fe pnictide superconductors. The Wilson ration R-W = chi/gamma x pi(2) kB(2)/3 mu B-2 Close to I indeed implies the absence of strong electron correlations and magnetic fluctuations unlike Fe pnictides.
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