标题： 在去离子水制备的原子级平坦基底上进行 LaAlO3/SrTiO3 异质界面的研究 显示英文标题

标题： Conducting LaAlO3/SrTiO3 heterointerfaces on atomically flat substrates prepared by deionized-water

摘要： 我们研究了最近开发的用于原子平坦SrTiO3 (STO)衬底的水浸方法对LaAlO3 (LAO)和STO异质界面输运特性的影响。 在相同的生长条件下，使用脉冲激光沉积法，我们在两种不同的STO衬底上合成了外延LAO薄膜，这两种衬底分别通过水浸和缓冲氢氟酸（BHF）蚀刻方法制备。 在水浸衬底上生长的LAO/STO异质结构的结构、输运和光学特性与在BHF蚀刻衬底上生长的样品具有相同的高质量。 这些结果表明，水浸方法可以在没有安全问题的情况下用于生长具有原子级定义异质界面的复杂氧化物异质结构。 显示英文摘要

摘要： We have investigated how the recently-developed water-leaching method for atomically-flat SrTiO3 (STO) substrates affects the transport properties of LaAlO3 (LAO) and STO heterointerfaces. Using pulsed laser deposition at identical growth conditions, we have synthesized epitaxial LAO thin-films on two different STO substrates, which are prepared by water-leaching and buffered hydrofluoric acid (BHF) etching methods. The structural, transport, and optical properties of LAO/STO heterostructures grown on water-leached substrates show the same high-quality as the samples grown on BHF-etched substrates. These results indicate that the water-leaching method can be used to grow complex oxide heterostructures with atomically well-defined heterointerfaces without safety concerns.