Postdoctoral Fellow (PREP0004167) Full-time

Postdoctoral Fellow

This position is part of the National Institute of Standards and Technology (NIST) Professional Research Experience Program (PREP). NIST recognizes that its research staff may want to collaborate with researchers at academic institutions on specific projects of mutual interest and, therefore, requires those institutions to be recipients of a PREP award. The PREP program involves staff from a wide range of backgrounds conducting scientific research across various fields. Individuals in this position will perform technical work supporting the collaboration's scientific research.

Research Title: Nanofabrication and Metrology Specialist

The work will entail:

• Designing and fabricating van der Waals heterostructure devices, including rhombohedral graphene and twisted graphene multilayers, for investigation with scanning probe microscopy.
• Fabrication of superlattices in 2d materials via e-beam lithography.
• Perform measurements with scanning probe microscopy techniques.
• Presenting results at internal meetings, and occasional meetings with external stakeholders.
• Ensuring that results, protocols, software, and documentation have been archived or otherwise transmitted to the larger organization.

Qualifications:

• A PhD degree in experimental condensed matter physics.
• Five years of experience in fabricating nanoscale patterns at complex oxide interfaces using conductive atomic force microscopy (c-AFM) and ultra-low voltage electron beam lithography (ULV-EBL).
• Three years of experience in nanoscale patterning of ferroelectric materials, using ultra-low voltage electron beam lithography.
• Five years of experience in cleanroom-based nanofabrication of nanoelectronics and quantum devices, including layout design, fume hood, resist-based lithography (photolithography and electron-beam lithography), thin-film deposition and etching.
• Three years of experience in fabricating two-dimensional layered material devices, including graphene and hexagonal boron nitride heterostructures stacking and transferring.
• Five years of experience in electrical transport measurements at ultra-low temperatures.
• Five years of experience in radio frequency (RF) measurements at ultra-low temperatures.
• Five years of experience in the maintenance and operation of a dilution refrigerator.
• Five years of experience in handling cryogens, including liquid helium transfer.
• Experience in operating a multi-modal measurements scanning probe system, including STM, AFM, and electrical transport measurements in a single system operating at ultra-low temperatures and in ultra-high vacuum.
• Experience in the preparation of atomically sharp probe tips for STM and AFM measurements.
• Experience with ultra-high vacuum (UHV) techniques, including assembly, types of UHV pumps, in-situ ion sputtering, and reflection high-energy electron diffraction (RHEED) measurements.
• Experience in dilute atom evaporation in UHV for SPM experiments on single isolated deposited atoms.
• Five years of experience in research of complex oxide physics, including in LaAlO3/SrTiO3 (LAO/STO) heterostructures, with a least three peer-reviewed publications.
• Three years of experience in research of 2D quantum materials, including graphene-based heterostructures and related van der Waals materials.
• Research experience in superconducting materials.
• Research experience with SPM probe-based superconducting Josephson junctions.
• Five years of experience in developing and programming LabVIEW VIs for electrical transport measurements and spectroscopic mapping of STM and AFM measurements on the Nanonis SPM control system platform.
• Five years of experience in developing and programming LabVIEW Vis for general instrument control and transport measurements.