SrTiO3/云母异质界面上范德华相互作用和离子相互作用的竞争

IF 3.6 2区 物理与天体物理 Q2 PHYSICS, APPLIED
Renhong Liang, Shanming Ke
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引用次数: 0

摘要

在2D衬底上生长3D薄膜,通常被称为准范德华(vdW)外延的过程,通常被认为涉及界面上的化学和vdW相互作用。迄今为止,化学和vdW在界面上的相互作用之间的竞争尚未建立。在这项工作中,我们证明了沉积物种的化学活性对于确定3D/2D异质界面的结构至关重要。在脉冲激光沉积过程中,可以通过控制氧分压来调节SrTiO3 (STO)的化学活性。因此,可以调整STO/云母界面上化学和vdW相互作用的相对贡献。这一发现最终解释了云母上STO外延中[111]和[001]取向的共存。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The competition between van der Waals and ionic interactions at the SrTiO3/mica heterointerface
Growing a 3D film on a 2D substrate, a process often referred to as quasi-van der Waals (vdW) epitaxy, is generally believed to involve both chemical and vdW interactions at the interface. To date, the competition between chemical and vdW interactions at the interface has yet to be established. In this work, we demonstrate that the chemical activity of deposited species is crucial for determining the structure of the 3D/2D heterointerface. During pulsed laser deposition, the chemical activity of SrTiO3 (STO) can be adjusted by controlling the oxygen partial pressure. Therefore, the relative contributions of chemical and vdW interactions at the STO/mica interface can be tuned. This finding ultimately explains the coexistence of [111] and [001] orientations in STO epitaxy on mica.
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来源期刊
Applied Physics Letters
Applied Physics Letters 物理-物理:应用
CiteScore
6.40
自引率
10.00%
发文量
1821
审稿时长
1.6 months
期刊介绍: Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.
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