Nanoelectronics Group

STATE OF THE ART TECHNIQUES

Our expertise lies in the unique combination of advanced experimental techniques, combining cutting-edge cryogenics, high sensitivity electronics, and nanotechnology.This allows us to access and manipulate new states of light and matter in quantum circuits.

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CRYOGENICS

We cool down our devices to extremely low temperatures, in the milikelvin range, to exacerbate the influence of quantum physics on electronic transport. We use both dry and wet dilution refrigerators to attain these temperatures, in conjunction with large static magnetic fields, up to 20 T. We benefit greatly from the expertise of SPEC's own cryogenics group.

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low noise measurements

We use state-of-the-art electronics to access the quantum transport properties of our devices down to the lowest temperatures, below 10 mK. This involves carefully filtered and thermalized circuits where extremely low signals are detected. We specialize in electronic noise measurements, from dc to the microwave range, using home-made cryogenic circuits and amplifiers.

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MICROWAVES

Our group has developped a strong expertise in radiofrequency and microwave techniques dedicated to sub-Kelvin environments allowing us to send fast microwave pulses to the samples, perform precise admittance measurements or efficiently collect low power microwave radiation emitted from the circuits we investigate.

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Nanofabrication

From quantum point contacts to superconducting microwave quantum circuits, most of our devices are fabricated in SPEC's nanofabrication facility. We strive to ever increase the quality of our samples by using the latest nanofabrication techniques. We also rely on ongoing collaborations with CNRS-C2N (France), the Cavendish Laboratory (UK) and CEA LETI (France) for high-quality gallium arsenide heterostructures and silicon MOSFET devices.

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van der waals heterostructures

We work with ultra-high quality graphene samples obtained in van der Waals heterostructures, where graphene flakes are encapsulated between ultra-flat, clean boron nitride crystals. This allows us to investigate exotic phenomena where coherence effects and electronic interactions become dominant. The highest quality boron nitride crystals are obtained through our collaboration with NIMS (Japan).

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