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High Quality Factor Graphene-Based Two-Dimensional Heterostructure Mechanical Resonator
Nano Letters ( IF 9.6 ) Pub Date : 2017-10-03 00:00:00 , DOI: 10.1021/acs.nanolett.7b01845 M. Will 1 , M. Hamer 2 , M. Müller 1 , A. Noury 3 , P. Weber 3 , A. Bachtold 3 , R. V. Gorbachev 2 , C. Stampfer 1, 4 , J. Güttinger 1
Nano Letters ( IF 9.6 ) Pub Date : 2017-10-03 00:00:00 , DOI: 10.1021/acs.nanolett.7b01845 M. Will 1 , M. Hamer 2 , M. Müller 1 , A. Noury 3 , P. Weber 3 , A. Bachtold 3 , R. V. Gorbachev 2 , C. Stampfer 1, 4 , J. Güttinger 1
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Ultralight mechanical resonators based on low-dimensional materials are well suited as exceptional transducers of minuscule forces or mass changes. However, the low dimensionality also provides a challenge to minimize resistive losses and heating. Here, we report on a novel approach that aims to combine different two-dimensional (2D) materials to tackle this challenge. We fabricated a heterostructure mechanical resonator consisting of few layers of niobium diselenide (NbSe2) encapsulated by two graphene sheets. The hybrid membrane shows high quality factors up to 245,000 at low temperatures, comparable to the best few-layer graphene mechanical resonators. In contrast to few-layer graphene resonators, the device shows reduced electrical losses attributed to the lower resistivity of the NbSe2 layer. The peculiar low-temperature dependence of the intrinsic quality factor points to dissipation over two-level systems which in turn relax over the electronic system. Our high sensitivity readout is enabled by coupling the membrane to a superconducting cavity which allows for the integration of the hybrid mechanical resonator as a sensitive and low loss transducer in future quantum circuits.
中文翻译：
高质量因子石墨烯基二维异质结构机械谐振器
基于低维材料的超轻机械谐振器非常适合作为微小力或质量变化的出色传感器。然而，低尺寸也带来了使电阻损耗和发热最小化的挑战。在这里，我们报告了一种新颖的方法，旨在结合不同的二维（2D）材料来应对这一挑战。我们制造了一种异质结构机械谐振器，该谐振器由几层二硒化铌（NbSe 2）包裹，并被两个石墨烯片包裹。杂化膜在低温下显示出高达245,000的高质量因子，可与最佳的几层石墨烯机械谐振器相媲美。与多层石墨烯谐振器相比，该器件显示出归因于NbSe 2电阻率较低的电损耗降低层。本征品质因数的特殊低温依赖性表明，在两级系统中会产生耗散，从而在电子系统中会产生弛豫。我们的高灵敏度读数是通过将膜耦合到超导腔而实现的，该腔允许在未来的量子电路中将混合机械谐振器集成为灵敏且低损耗的换能器。
更新日期：2017-10-03
中文翻译：
高质量因子石墨烯基二维异质结构机械谐振器
基于低维材料的超轻机械谐振器非常适合作为微小力或质量变化的出色传感器。然而，低尺寸也带来了使电阻损耗和发热最小化的挑战。在这里，我们报告了一种新颖的方法，旨在结合不同的二维（2D）材料来应对这一挑战。我们制造了一种异质结构机械谐振器，该谐振器由几层二硒化铌（NbSe 2）包裹，并被两个石墨烯片包裹。杂化膜在低温下显示出高达245,000的高质量因子，可与最佳的几层石墨烯机械谐振器相媲美。与多层石墨烯谐振器相比，该器件显示出归因于NbSe 2电阻率较低的电损耗降低层。本征品质因数的特殊低温依赖性表明，在两级系统中会产生耗散，从而在电子系统中会产生弛豫。我们的高灵敏度读数是通过将膜耦合到超导腔而实现的，该腔允许在未来的量子电路中将混合机械谐振器集成为灵敏且低损耗的换能器。
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