Decoherence in molecular nanomagnets

分子纳米磁体的退相干

• 批准号: 1508661
• 负责人: Susumu Takahashi
• 金额: $ 30.46万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1508661&HistoricalAwards=false
• 关键词: Decoherence; molecular; nanomagnets

Nontechnical Abstract:Molecular nanomagnets are nanometer scale magnets that produce a large magnetic field. Because of the quantum nature in their magnetism and capability to tune their magnetic properties, molecular nanomagnets are promising materials for future applications of nano-scale magnetic storage and quantum information processing devices. This project entails a research plan that integrates the investigation and control of quantum memory time, known as quantum decoherence time, in molecular nanomagnets with innovative inter-disciplinary educational and outreach activities centered at the University of Southern California (USC). The research activities focus on revealing the origin of quantum decoherence in molecular nanomagnets using unique magnetic resonance techniques to significantly improve quantum coherence. Furthermore, the project incorporates educational activities including research training and curriculum developments for USC graduate and undergraduate students as well as science experiences and outreach activities for high school and elementary school students in the neighborhood community of USC with a high concentration of under-represented population in STEM fields.Technical Abstract:This project aims to investigate and control quantum coherence in molecular nanomagnets. Quantum decoherence has become one of the most pressing problems in many solid-state spin systems. Among the solid-state systems, molecular nanomagnets are excellent testbed for understanding nanomagnetism and for applications to dense magnetic storage and quantum spintronics devices because of their nanoscale size, quantum nature in the magnetism, physical and chemical stability, and capability to tune the magnetic properties and couplings to surrounding environments. In this research project, the principle investigator plans to investigates the nature of quantum decoherence in molecular magnets using novel magnetic resonance techniques to demonstrate long quantum coherence. Success in the proposed work will provide a promising pathway for developing molecular nanomagnets with desired coherent properties and setting a general platform for future science on molecular nanomagnet-based spin devices. Furthermore, the project incorporates educational activities including research training and curriculum developments for USC graduate and undergraduate students as well as science experiences and outreach activities for high school and elementary school students in the neighbourhood community of USC with a high concentration of under-represented population in STEM fields.

非技术摘要：分子纳米磁铁是产生大磁场的纳米尺度磁铁。由于其磁性和调整磁性特性的能力的量子性质，分子纳米磁铁是纳米级磁性存储和量子信息处理设备的未来应用的有希望的材料。该项目需要一项研究计划，该计划将分子纳米磁体中的量子记忆时间的调查和控制与以南加州大学（USC）为中心的创新学科跨学科的教育和外展活动相结合。研究活动着重于揭示使用独特的磁共振技术来显着提高量子相干性的分子纳米磁体中量子反应的起源。 Furthermore, the project incorporates educational activities including research training and curriculum developments for USC graduate and undergraduate students as well as science experiences and outreach activities for high school and elementary school students in the neighborhood community of USC with a high concentration of under-represented population in STEM fields.Technical Abstract:This project aims to investigate and control quantum coherence in molecular nanomagnets.在许多固态旋转系统中，量子变质已成为最紧迫的问题之一。在固态系统中，分子纳米磁铁是理解纳米磁化的出色测试床，以及用于密集的磁性储存和量子旋转型设备的应用。在该研究项目中，原理研究者计划使用新型的磁共振技术研究分子磁体中量子反应的性质，以证明长量子相干性。在拟议的工作中的成功将为开发具有所需相干特性的分子纳米磁体提供有希望的途径，并为基于分子纳米磁体的旋转器件的未来科学设定了一个通用平台。此外，该项目纳入了教育活动，包括研究培训和课程发展，为USC毕业生和本科生以及在USC附近的高中和小学生的科学经验和外展活动，在STEM领域中人口不足的人口不足。

项目成果

DNP-NMR of surface hydrogen on silicon microparticles

硅微粒表面氢的 DNP-NMR

• DOI: 10.1016/j.ssnmr.2019.04.008
• 发表时间: 2019
• 期刊: Solid State Nuclear Magnetic Resonance
• 影响因子: 3.2
• 作者: Shimon, Daphna;van Schooten, Kipp J.;Paul, Subhradip;Peng, Zaili;Takahashi, Susumu;Köckenberger, Walter;Ramanathan, Chandrasekhar
• 通讯作者: Ramanathan, Chandrasekhar

Electron spin resonance spectroscopy of small ensemble paramagnetic spins using a single nitrogen-vacancy center in diamond

• DOI: 10.1063/1.4963717
• 发表时间: 2015-07
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: C. Abeywardana;V. Stepanov;F. Cho;Susumu Takahashi

Reduction of surface spin-induced electron spin relaxations in nanodiamonds

• DOI: 10.1063/5.0007599
• 发表时间: 2020-08
• 期刊: arXiv: Mesoscale and Nanoscale Physics
• 作者: Zaili Peng;Jax Dallas;Susumu Takahashi

Investigation of near-surface defects of nanodiamonds by high-frequency EPR and DFT calculation

• DOI: 10.1063/1.5085351
• 发表时间: 2019-04-07
• 期刊: JOURNAL OF CHEMICAL PHYSICS
• 影响因子: 4.4
• 作者: Peng, Z.;Biktagirov, T.;Takahashi, S.
• 通讯作者: Takahashi, S.

Spin coherence in a Mn 3 single-molecule magnet

Mn 3 单分子磁体中的自旋相干性

• DOI: 10.1063/1.4940437
• 发表时间: 2016
• 期刊: Applied Physics Letters
• 影响因子: 4
• 作者: Abeywardana, Chathuranga;Mowson, Andrew M.;Christou, George;Takahashi, Susumu
• 通讯作者: Takahashi, Susumu