Determining the origin and consequences of novel phase transitions is a key task in condensed matter physics research. Recently, Lu(Pt_1−xPd_x)₂In was discovered to present a very rare case of strongly enhanced superconductivity at a charge density wave (CDW) quantum critical point (QCP). Unlike in most other systems, the CDW transition here is of second-order. By tuning it continuously to absolute zero temperature with variation of an external non-thermal control parameter, for instance chemical composition x or pressure p, a CDW QCP is approached. We present how we succeeded in synthesising large high-quality single crystals of the new Lu(Pt_1−xPd_x)₂In series with a large number of intermediate concentrations x. We briefly provide information about the challenges in growing phase-pure single crystals. Furthermore, different anomalies in the temperature dependences of magnetic susceptibility χ(T) and electrical resistivity ρ(T) are presented and discussed. The availability of excellent crystals allowed us to investigate the effect of applied hydrostatic pressure p on the CDW and the superconducting state in Lu(Pt_0.5Pd_0.5)₂In by ρ(T)|_p measurements.

中文翻译：

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电荷密度波量子临界Lu（Pt1-xPdx）2In的单晶生长和静水压研究

确定新型相变的起源和后果是凝聚态物理研究的关键任务。最近，发现Lu（Pt _{1- x} Pd _x）₂ In在电荷密度波（CDW）量子临界点（QCP）上呈现出非常罕见的强烈增强的超导性的情况。与大多数其他系统不同，此处的CDW转换是二阶的。通过在外部非热控制参数（例如化学成分x或压力p）变化的情况下将其连续调节至绝对零温度，可达到CDW QCP。我们介绍了如何成功合成新型Lu（Pt _{1− x} Pd的大型高质量单晶_x） ₂与大量中间浓度x串联。我们简要提供了有关生长相纯单晶的挑战的信息。此外，提出并讨论了磁化率χ（ T）和电阻率ρ（ T）随温度变化的不同异常。优秀晶体的可用性使我们能够通过ρ（ T）|来研究施加的静水压力p对CDW和Lu（Pt _0.5 Pd _0.5） ₂ In中的超导状态的影响。_p 测量。