Superconducting Contacts to a Monolayer Semiconductor.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 34161104.
- Also identified by DOI 10.1021/acs.nanolett.1c00615 and PMC identifier 8283752.
- Licence recorded as CC BY-NC-ND.
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Abstract
We demonstrate superconducting vertical interconnect access (VIA) contacts to a monolayer of molybdenum disulfide (MoS<sub>2</sub>), a layered semiconductor with highly relevant electronic and optical properties. As a contact material we use MoRe, a superconductor with a high critical magnetic field and high critical temperature. The electron transport is mostly dominated by a single superconductor/normal conductor junction with a clear superconductor gap. In addition, we find MoS<sub>2</sub> regions that are strongly coupled to the superconductor, resulting in resonant Andreev tunneling and junction-dependent gap characteristics, suggesting a superconducting proximity effect. Magnetoresistance measurements show that the bandstructure and the high intrinsic carrier mobility remain intact in the bulk of the MoS<sub>2</sub>. This type of VIA contact is applicable to a large variety of layered materials and superconducting contacts, opening up a path to monolayer semiconductors as a platform for superconducting hybrid devices.