CeCoIn $_5$中超导性、反铁磁性和泡利亏损的相互作用
Interplay of Superconductivity, Antiferromagnetism, and Pauli Depairing in CeCoIn$_5$
摘要：
通过CeCoIn_5的超导上临界场H_c_2，在磁场H平行于晶体c轴的情况下，进行了低至70~mK的低温磁化强度M测量。通过上临界场H_c2（0）的穿越由M（T）的温度依赖性的符号变化来标记。在超导相中，磁化强度服从费米液体定律，而在高于H_c2的顺磁态，磁化强度服从准线性温度关系。因此，低于H_c2的比热由比热的线性项γ（H）的增加所支配，并由H_{c2}（0）处的奇异性所标记。在H_c2以下没有观察到所谓的Q相的指示（与在基面中施加H的情况相反）。
英文摘要：
Low temperature magnetization M measurements down to 70~mK have been performed through the superconducting upper critical field H_c2 of CeCoIn5 with the field H parallel to the c axis of the tetragonal crystal. The crossing through the upper critical field H_c2(0) is marked by a sign change in the temperature dependence of M(T). A Fermi liquid law of the magnetization is observed in the superconducting phase while in the paramagnetic state above H_c2 a quasi-linear temperature dependence is obeyed. The specific heat below H_c2 is therefor dominated by the increase of γ(H), the linear term of the specific heat, and is marked by a singularity at H_{c2} (0). No indication of the so called Q-phase was observed below H_c2 (in contrast to the case with H applied in the basal plane).
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