QLC: Goblet-Shaped, Lanthanide-Based Molecular Spin Valves

该项目由化学部的化学结构，动力学机制B计划资助，其目标是展示量子信息在沉积在表面上的单个高脚杯形磁性分子中的存储和/或处理，并进行电气控制。 量子信息处理可能导致量子计算机，它可能比目前的计算机更强大。 量子信息处理在安全通信和精确测量中也很重要。 从这项研究中得到的样品将被广泛分发给自旋电子学社区，以支持分子自旋电子学和基于分子的量子计算领域的扩展。 来自不同背景的学生，从高中到博士候选人水平，将参与该项目，使他们有机会获得不仅在化学，而且在材料科学和物理能力。 他们将为进入量子计算领域做好充分准备。 特别地，具有强磁各向异性的f区元素是优秀的自旋量子比特候选者。为该项目设计的分子呈高脚杯形状，具有容纳镧系元素离子的三环戊二烯基碗，可调节长度和刚度的茎和确保与金属表面强烈相互作用的芳香足。利用这种模块化的架构，从体相到单分子水平的结构-性质关系将进行广泛的调查。磁中心与下面的表面的解耦预计将保护其磁特性，并使它们可接近顶部电极或扫描隧道显微镜的尖端。这种类型的设置打开了实现单分子自旋过滤器或在铁磁表面上实现分子自旋阀的大门，为构建电寻址单分子自旋量子比特铺平了道路。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

The goal of this project, funded by the Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division, is to demonstrate the storage and/or processing of quantum information in a single goblet-shaped magnetic molecule deposited on a surface and controlled electrically. Quantum information processing could lead to quantum computers, which could be more powerful than the current computers. Quantum information processing is also important in secure communication and precision measurement. Samples resulting from this research will be widely distributed to the spintronics community to support the expansion of the fields of molecular spintronics and molecule-based quantum computing. Students from diverse backgrounds, from high-school to PhD candidate level, will be involved in the project, giving them the opportunity to acquire competences not only in chemistry but also in material science and physics. They will be well prepared to enter the workforce on quantum computing. Specifically, f-block elements, with their strong magnetic anisotropy, are excellent spin quantum bit candidates. The molecules designed for this project take the shape of a goblet, with a tricyclopentadienyl bowl holding a lanthanoid ion, a stem of tunable length and rigidity and an aromatic foot ensuring a strong interaction with a metallic surface. Taking advantage of this modular architecture, an extensive investigation of the structure-properties relationship will be conducted from the bulk state down to the single molecule level. The decoupling of the magnetic center from the underlying surface is expected to protect its magnetic characteristics and make them accessible to a top electrode or the tip of a scanning tunneling microscope. This type of setup opens the door to the realization of a single molecule spin filter or, on a ferromagnetic surface, a molecular spin valve, which paves the way to the construction of electrically addressable single molecule spin quantum bits.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.