High-Pressure Studies of Doped-Type Organic Superconductors
High-Pressure Studies of Doped-Type Organic Superconductors
复制标题
DOI：
10.1143/jpsjs.76sa.188
复制
发表时间：
2007
影响因子：
1.7
通讯作者：
T. Okuhata;T. Nagai;H. Taniguchi;K. Satoh;M. Hedo;Y. Uwatoko
中科院分区：
文献类型：
--
作者：
T. Okuhata;T. Nagai;H. Taniguchi;K. Satoh;M. Hedo;Y. Uwatoko
κ-(BEDT-TTF) 4 Hg 2.89 Br 8 is an ambient-pressure superconductor with a transition temperature ( T c ) value of 4.3 K. This salt can be considered as an electron system that is naturally carrier doped into a Mott insulator by a slight excalation of the Hg ions. In order to obtain information about the nature of the metallic and superconducting states in this doping system, we performed electrical resistivity measurements as functions of temperature and pressure. We revealed that T c showed an anomalous two-peak structure along the pressure axis. In addition, we found that the power of the temperature in the low-temperature normal-state resistivity correlated with the T c diagram. We concluded that an observable critical boundary existed between the non-Fermi-liquid and Fermi-liquid states in this system.
