关于CeCoIn5的（p，B）phase diagram中量子临界线的确定
Towards the identification of a quantum critical line in the (p, B) phase diagram of CeCoIn5
摘要：
平行和垂直于磁场B沿c轴方向测量的CeCoIn 5单晶的低温热膨胀产生体积热膨胀系数$β$。$β(T)$与费米液体行为的相当大的偏差已经发生在（B，T）相图的超导区域内，并且在上临界场$B^0_{c2}$处变得最大。然而，$β(T)$和格吕奈森参数$Γ$与$B^0_{c2}$的量子临界点（QCP）不相容，但对于$B < B^0_{c2}$，允许被超导性屏蔽并延伸到负压的QCP。结合文献数据，我们构建了CeCoIn 5的（p，B，T）相图，表明在（p，B）平面上存在量子临界线。
英文摘要：
The low-temperature thermal expansion of CeCoIn5 single crystals measured parallel and perpendicular to magnetic fields B oriented along the c axis yields the volume thermal-expansion coefficient $β$. Considerable deviations of $β(T)$ from Fermi-liquid behavior occur already within the superconducting region of the (B, T) phase diagram and become maximal at the upper critical field $B^0_{c2}$. However, $β(T)$ and the Grüneisen parameter $Γ$ are incompatible with a quantum critical point (QCP) at $B^0_{c2}$, but allow for a QCP shielded by superconductivity and extending to negative pressures for $B < B^0_{c2}$. Together with literature data we construct a tentative (p, B, T) phase diagram of CeCoIn5 suggesting a quantum critical line in the (p, B) plane.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
