论文标题
在Tomonaga-Luttinger液体中有吸引力相互作用的方向上的超导性
Superconductivity in the regime of attractive interactions in the Tomonaga-Luttinger liquid
论文作者
论文摘要
虽然tomonaga-luttinger液体（TLL）的绝大多数已知物理实现都具有由无量纲的相互作用参数$ k _ {\ rm c} <1 $定义的排斥相互作用，但我们在这里报告说rb $ _2 $ _2 $ mo $ _3 $ as $ _3 $ as $ _3 $是相反的tll tll Incement tll的互动式的。这是从$^{87} $ rb旋转静止放松率的$^{87} $ rb旋转温度范围内的tll-thracteristic幂律温度依赖性得出的结论，从而产生了电荷集体模式的TLL相互作用参数$ k _ {\ rm c} = 1.4 $。一维频段的tll几乎可以追溯到$ t _ {\ rm c} = 10.4 $ 〜k，其中散装超导状态通过存在三维频段而稳定，其特征是$^{87} $ rb温度独立的骑士独立的转移和缺乏史无前及的峰值率，而不断下降。在高磁场中测得的小超导间隙反映了涡流核心松弛的重要性，或者是由定义前体TLL的有吸引力的相互作用而引起的超导状态的独特性。
While the vast majority of known physical realizations of the Tomonaga-Luttinger liquid (TLL) have repulsive interactions defined with the dimensionless interaction parameter $K_{\rm c}<1$, we here report that Rb$_2$Mo$_3$As$_3$ is in the opposite TLL regime of attractive interactions. This is concluded from a TLL-characteristic power-law temperature dependence of the $^{87}$Rb spin-lattice relaxation rates over broad temperature range yielding the TLL interaction parameter for charge collective modes $K_{\rm c}=1.4$. The TLL of the one-dimensional band can be traced almost down to $T_{\rm c} = 10.4 $~K, where the bulk superconducting state is stabilized by the presence of a three-dimensional band and characterized by the $^{87}$Rb temperature independent Knight shift and the absence of Hebel-Slichter coherence peak in the relaxation rates. The small superconducting gap measured in high magnetic fields reflects either the importance of the vortex core relaxation or the uniqueness of the superconducting state stemming from the attractive interactions defining the precursor TLL.
