论文标题
一个小说$ \ sqrt {19} \ times \ sqrt {19} $ superstructure在外延上种植1t-tate $ _2 $
A novel $\sqrt{19}\times\sqrt{19}$ superstructure in epitaxially grown 1T-TaTe$_2$
论文作者
论文摘要
电子订单的自发形成是了解二维材料中复杂的量子状态和工程异质结构的关键要素。我们报告了一个新颖的$ \ sqrt {19} \ times \ sqrt {19} $充电订单，以几层厚的1t-tate $ _2 $过渡金属二色氏元素膜通过分子束外观上的生长，尚未实现。我们的光发射和扫描探针测量表明，单层1T-TATE $ _2 $表现出各种亚稳态的电荷密度波订单，包括$ \ sqrt {19} \ times \ times \ sqrt {19} $ susterpstructure，可以通过控制后的静态温度来选择性地稳定这些稳定。此外，我们发现只有$ \ sqrt {19} \ times \ sqrt {19} $订单在1T-tate $ _2 $胶片中持续使用比单层厚的胶片，最多8层。我们的发现在众所周知的过渡金属二分法中确定了先前未实现的新型电子秩序，并提供了在外延生长过程中控制它的可行途径。
The spontaneous formation of electronic orders is a crucial element for understanding complex quantum states and engineering heterostructures in two-dimensional materials. We report a novel $\sqrt{19}\times\sqrt{19}$ charge order in few-layer thick 1T-TaTe$_2$ transition metal dichalcogenide films grown by molecular beam epitaxy, which has not been realized. Our photoemission and scanning probe measurements demonstrate that monolayer 1T-TaTe$_2$ exhibits a variety of metastable charge density wave orders, including the $\sqrt{19}\times\sqrt{19}$ superstructure, which can be selectively stabilized by controlling the post-growth annealing temperature. Moreover, we find that only the $\sqrt{19}\times\sqrt{19}$ order persists in 1T-TaTe$_2$ films thicker than a monolayer, up to 8 layers. Our findings identify the previously unrealized novel electronic order in a much-studied transition metal dichalcogenide and provide a viable route to control it within the epitaxial growth process.
