Journal
NANO LETTERS
Volume 17, Issue 10, Pages 5950-5955Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b01845
Keywords
Mechanical resonator; graphene; NbSe2; 2D heterostructures; NEMS; cavity readout
Categories
Funding
- Helmholtz Nano Facility (HNF)47 at the Forschungszentrum Julich
- Excellence Initiative (RWTH)
- ERC-carbonNEMS
- ERC-GQEMS [280140]
- ERC [692876]
- Foundation Cellex, Severo Ochoa [SEV-2015-0522]
- MINECO [FIS2015-69831-P]
- Fondo Europeo de Desarrollo Regional (FEDER)
- European Research Council (ERC) [692876] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available