Transferable two-dimensional correlated oxide layers

可转移的二维相关氧化物层

• 批准号: 436610738
• 负责人: Professorin Dr. Regina Dittmann
• 金额: --
• 依托单位: Max-Planck-Institut für Festkörperforschung (MPI-FKF)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/436610738?language=en
• 关键词: Transferable; two; dimensional; correlated; oxide

To2Dox aims at fabricating and characterizing a new class of freestanding 2D layers based on correlated transition metal oxides, and their combination in multifunctional heterostructures with conventional 2D van der Waals (vdW) materials. 2D-oxide freestanding layers will harbor novel spontaneous and externally switchable collective states driven by electronic correlations which will tremendously expand the functional capabilities of current vdW materials and generate synergies with the Graphene Flagship. The new type of freestanding correlated oxide 2D layers will be synthesized from epitaxial ultrathin oxide layers grown on sacrificial layers with atomic level control of their chemistry and structure. 2D oxide layers will be transferred and manipulated using deterministic placement methods developed for 2D vdW materials. A strong effort will be dedicated to the characterization of the unique surface reconstructions and defect structure of these oxide layers and their functional response. The atomic, electronic, magnetic and vibrational properties of defects in 2D oxide layers will be calculated using the state-of-the-art first principles methods based on hybrid functionals. Heterostructures combining freestanding layers of correlated oxides with vdW 2D layers will inspire a completely new generation of proximity phenomena. These will be exploited to engineer electronic groundstates with tunable responses, absent in the current vdW materials including electrically controlled topological states, spin-orbit induced spin textures or topological superconductivity.Our project will realize the hybridization of two emerging fields: oxide interfaces and 2D vdW materials. It will synergize a very large palette of complementary expertise covering all the research methods to achieve project objectives. The consortium includes experts in the epitaxial growth of oxides with atomic control of the interfaces and in their functional characterization, in oxides defects characterization and manipulation, in the fabrication of planar perpendicular devices including proximity interactions and in the synthesis, manipulation and characterization of 2D vdW materials.Regarding the expected impact of To2Dox, the project relies on a transformative effort for expanding functionalities of 2D materials by incorporating the robust collective states of a completely new family of layered freestanding materials: the 2D oxide materials. On the other hand, it is committed to the study and realization of a novel technological platform based on the oxide nanotechnology for exploiting novel quantum states in correlated oxides. Furthermore, from the applied perspective, collective orders switchable by an external field could inspire new strategies for new device concepts towards future atto-Joule low voltage logic surpassing the (energy) limitations of the current CMOS semiconductor technology.

To2Dox旨在制造和表征一类基于相关过渡金属氧化物的新型独立二维层，并将其与传统的二维范德华（vdW）材料结合在多功能异质结构中。2d -氧化物独立层将拥有由电子相关驱动的新颖的自发和外部可切换的集体状态，这将极大地扩展当前vdW材料的功能，并与石墨烯旗舰产生协同效应。在牺牲层上生长外延超薄氧化物层，并对其化学和结构进行原子水平控制，从而合成新型独立相关氧化物二维层。二维氧化层将被转移和操纵使用确定性放置方法开发的二维vdW材料。我们将致力于表征这些氧化层独特的表面重建和缺陷结构及其功能响应。二维氧化层中缺陷的原子、电子、磁性和振动特性将使用最先进的基于混合泛函的第一性原理方法进行计算。结合独立的相关氧化物层和vdW二维层的异质结构将激发全新一代的接近现象。这些将被用于设计具有可调谐响应的电子基态，这在当前的vdW材料中是不存在的，包括电气控制的拓扑态、自旋轨道诱导的自旋织构或拓扑超导性。我们的项目将实现两个新兴领域的杂交：氧化物界面和二维vdW材料。它将协同一个非常大的调色板互补的专业知识，涵盖所有的研究方法，以实现项目目标。该联盟包括氧化物的外延生长与界面的原子控制及其功能表征，氧化物缺陷表征和操作，平面垂直器件的制造（包括接近相互作用）以及二维vdW材料的合成，操作和表征方面的专家。关于To2Dox的预期影响，该项目依赖于一种变革性的努力，通过结合一种全新的层状独立材料的强大集体状态来扩展2D材料的功能：2D氧化物材料。另一方面，致力于研究和实现基于氧化物纳米技术的新型技术平台，以开发相关氧化物中的新型量子态。此外，从应用的角度来看，通过外场可切换的集体顺序可以激发新器件概念的新策略，以实现超越当前CMOS半导体技术（能量）限制的未来阿焦耳低压逻辑。