Investigation of the quasi-one-dimensional superconducting state based on high-resolution field-angle-resolved calorimetory

分子导体（TMTSF）_2X作为准一维导体的典型代表，在三个主方向上的电导率都不同，已经被研究了30多年。我们成功地测量了单晶（TMTSF）_2ClO_4的热容量。从所得结果中，我们揭示了超导能隙结构和热力学相图。这些对于理解TMTSF家族的超导性是非常重要的信息，但在这30年里还没有得到实验上的澄清。

The molecular conductor (TMTSF)_2X has been actively studied for more than 30 years as an archetypal quasi-one-dimensional conductor, in which conductivity differs for all three principle directions. We succeeded in measuring the heat capacity of single-crystalline (TMTSF)_2ClO_4 with accurately controlling the field direction. From the obtained results, we revealed the superconducting gap structure and the thermodynamic phase diagram. These are fundamentally important information for understandings of superconductivity of the TMTSF family but have not been experimentally clarified for this 30 years.