论文标题
不连贯玻色子的奇怪金属
Strange metal from incoherent bosons
论文作者
论文摘要
在奇怪的金属阶段，著名的费米液体理论的崩溃是相关量子物质的中心谜。通过最近报告短寿命载体的实验，以及对丘比特相相图中调制激发的无处不在观察，我们为此阶段提出了一个模型。我们引入了从奇怪的金属相中的额外电流载体中从残留物中出现的玻色子。这些骨气激发是有限的动量库珀对，因此带有两倍的电子电荷，其净旋转可以为零，也可以是由两个旋转$ 1/2 $电子产生的。我们表明，这样的模型可以捕获电阻率与温度的著名线性关系，并以普兰克耗散率的形式表现出Acductivity的Drude形式。此外，这样的玻色子是不连贯的，因此没有助长霍尔电导率。从自旋三个对称对称的电子对中出现的玻色子也繁殖了最近观察到的线性现场磁场[P. P. Giraldo-Gallo等人，Science 361，479（2018）; J. Ayres等，Arxiv：2012.01208（2020）]。
The breakdown of the celebrated Fermi liquid theory in the strange metal phase is the central enigma of correlated quantum matter. Motivated by recent experiments reporting short-lived carriers, along with the ubiquitous observations of modulated excitations in the phase diagram of cuprates, we propose a model for this phase. We introduce bosons emerging from the remnants of a pair density wave as additional current carriers in the strange metal phase. These bosonic excitations are finite momentum Cooper pairs and thus carry twice the electronic charge, and its net spin can either be zero or one arising from the two spin-$1/2$ electrons. We show that such a model can capture the famous linear relationship of resistivity with temperature and manifests the Drude form of ac-conductivity with a Planckian dissipation rate. Furthermore, such bosons are incoherent and hence do not contribute to the Hall conductivity. The bosons emerging from the electron pairs of spin-triplet symmetry also reproduce the recently observed linear in-field magnetoresistance [P. Giraldo-Gallo et al., Science 361, 479 (2018); J. Ayres et al., arXiv: 2012.01208 (2020)].
