论文标题
蜂窝状晶格在莫特 - 奇数的边缘
Honeycomb lattice iridate on the verge of Mott-collapse
论文作者
论文摘要
一个新的蜂窝晶格偶像（la，na）iro $ _3 $（$ \ $ \ $ lanair $ _2 $ o $ $ _6 $）通过替换与Interlayer na $^+$^$ la $^$^$^$^$^^3+}的旋转轨耦合mott na $ _2 $ _2 $ iro $ _3 $成功合成。 （la，na）IRO $ _3 $显示了有限的sommerfeld术语，其热容量和电阻率的$ - \ ln t $依赖性，表明实现了由莫特倒塌驱动的金属状态。此外，晶体结构分析揭示了具有金属金属键的IR锯齿形链的形成，从而增加了动能，从而导致莫特崩溃。该观察结果是由于$ j {\ mathrm {eff}} = 1/2 $ spin-orbit耦合mott绝缘子与IR Honeycomb lattice通过topochemical Control通过离子配置的topochemical Control中引起的莫特崩溃。
A new honeycomb lattice iridate (La,Na)IrO$_3$ ($\approx$ LaNaIr$_2$O$_6$) is successfully synthesized from the spin-orbit coupled Mott insulator Na$_2$IrO$_3$ by replacing the interlayer Na$^+$ ions with La$^{3+}$ ions. (La,Na)IrO$_3$ shows a finite Sommerfeld term in heat capacity and a $-\ln T$ dependence of resistivity, indicating a realization of a metallic state driven by a Mott collapse. Furthermore, crystal structure analysis reveals the formation of Ir zig-zag chains with metal-metal bonding, increasing kinetic energy resulting in the Mott collapse. This observation would be due to a Mott collapse induced in a $J_{\mathrm{eff}} = 1/2$ spin-orbit coupling Mott insulator with an Ir honeycomb lattice by topochemical control of the ionic configuration.
