论文标题
从IRTE2纳米片的条纹充电顺序出现的超导率
Superconductivity emerging from a stripe charge order in IrTe2 nanoflakes
论文作者
论文摘要
竞争电子顺序附近的超导性通常以一个超导圆顶表现出来，以相位图中的假定量子临界点为中心。在许多非常规的超导体中发现的这种共同特征支持了一种普遍的情况，即父级的波动或部分熔化对于诱导或增强超导性至关重要。在这里，我们提出了一个相反的例子，在IRTE2纳米片中发现，在该纳米片中，在厚度依赖性相图中，在父条纹充电顺序阶段很好地鉴定了超导圆顶。与掺杂的散装散装IRTE2相比，IRTE2纳米片的共存条纹电荷顺序显着增加了平面外相干长度和超导性的耦合强度。这些发现阐明了父条纹的固有不稳定性，足以在IRTE2中诱导超导性，而无需完全或部分熔化。我们的研究强调了厚度控制是揭示相关VDW材料固有相图的有效手段。
Superconductivity in the vicinity of a competing electronic order often manifests itself with a superconducting dome, centred at a presumed quantum critical point in the phase diagram. This common feature, found in many unconventional superconductors, has supported a prevalent scenario that fluctuations or partial melting of a parent order are essential for inducing or enhancing superconductivity. Here we present a contrary example, found in IrTe2 nanoflakes of which the superconducting dome is identified well inside the parent stripe charge ordering phase in the thickness-dependent phase diagram. The coexisting stripe charge order in IrTe2 nanoflakes significantly increases the out-of-plane coherence length and the coupling strength of superconductivity, in contrast to the doped bulk IrTe2. These findings clarify that the inherent instabilities of the parent stripe phaseare sufficient to induce superconductivity in IrTe2 without its complete or partial melting. Our study highlights the thickness control as an effective means to unveil intrinsic phase diagrams of correlated vdW materials.
