论文标题
竞争费用/自旋条纹和三层镍中的相关金属阶段（pr $ _ {1-x} $ la $ _x $）$ _ 4 $ ni $ _3 $ _3 $ o $ $ _8 $
Competing Charge/Spin-Stripe and Correlated Metal Phases in Trilayer Nickelates (Pr$_{1-x}$La$_x$)$_4$Ni$_3$O$_8$
论文作者
论文摘要
Low-valent nickelates R$_{n+1}$Ni$_n$O$_{2n+2}$ (R = rare earth) containing Ni$^{1+}$ (d$^{9}$) with a quasi-two-dimensional (quasi-2D) square planar coordination geometry possess structural and electronic properties that are similar to those of high-Tc铜层，包括超导性本身在掺杂的无限层中（$ n = \ infty $）rnio $ _2 $系统。在此r $ _ {n+1} $ ni $ _n $ o $ _ {2n+2} $镍族家庭，晶体学同位pr $ _4 $ ni $ ni $ _3 $ _3 $ _3 $ _8 $和la $ _4 $ _4 $ ni $ ni $ _3 $ _3 $ _8 $ $ _8 $ $ $ $ $ $ $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ ni $ 10金属和la $ _4 $ ni $ _3 $ o $ _8 $是充电和自旋条纹订购的绝缘子。要探索和了解金属pr $ _4 $ ni $ _3 $ o $ $ _8 $的基础状态进化，以使条纹订购的la $ _4 $ _4 $ _3 $ _3 $ _3 $ _8 $ _8 $ _4 $ _4 $ ni $ ni $ _3 $ _3 $ _3 $ $ _8 $，我们已经成长为一系列Isovalent sings usborted单晶体， （pr $ _ {1-x} $ la $ _x $）$ _ 4 $ ni $ _3 $ o $ $ _8 $。结合了热力学，传输，磁性和同步加速器X射线单晶衍射测量值，我们揭示了金属和条纹 - 构造器相位区域之间的过渡，并在x = 0.4处进行推定的量子相变。我们为（pr $ _ {1-x} $ la $ _x $）提出了两个可能的模型，$ _ 4 $ ni $ _3 $ o $ $ _8 $：一种电子不均匀的系统，可以探索量子格里夫斯阶段物理学和具有较大量子的量子量的量子阶段的候选阶段的候选。
Low-valent nickelates R$_{n+1}$Ni$_n$O$_{2n+2}$ (R = rare earth) containing Ni$^{1+}$ (d$^{9}$) with a quasi-two-dimensional (quasi-2D) square planar coordination geometry possess structural and electronic properties that are similar to those of high-Tc cuprates, including superconductivity itself in the doped infinite layer ($n = \infty$) RNiO$_2$ system. Within this R$_{n+1}$Ni$_n$O$_{2n+2}$ nickelate family, the crystallographic isomorphs Pr$_4$Ni$_3$O$_8$ and La$_4$Ni$_3$O$_8$ exhibit singularly different ground states: Pr$_4$Ni$_3$O$_8$ is metallic and La$_4$Ni$_3$O$_8$ is a charge- and spin-stripe ordered insulator. To explore and understand the ground state evolution from metallic Pr$_4$Ni$_3$O$_8$ to stripe-ordered La$_4$Ni$_3$O$_8$ in the R$_4$Ni$_3$O$_8$ family, we have grown a series of isovalent-substituted single crystals (Pr$_{1-x}$La$_x$)$_4$Ni$_3$O$_8$. Combining thermodynamic, transport, magnetic, and synchrotron X-ray single crystal diffraction measurements, we reveal a transition between metallic and stripe-insulator phase regions, with a putative quantum phase transition at x = 0.4. We propose two possible models for (Pr$_{1-x}$La$_x$)$_4$Ni$_3$O$_8$: an electronically inhomogeneous system that could serve as a candidate for exploring quantum Griffiths phase physics and a homogeneous system with a putative quantum critical point at the phase boundary.
