PhD scholarship in Moiré and Patterned 2D Materials for Bandgap Engineering - DTU Physics

DTU - Technical University of Denmark; Kongens Lyngby; In loco; DKK 420.000 - 520.000; Tempo pieno

Descrizione del lavoro

DTU Physics and DTU Nanolab seek a PhD candidate to design and realize artificial superlattices in graphene and related 2D materials. You will leverage the cleanroom and microscopy facilities to imprint patterns and study the resulting electronic band structures.

You will work on assembling van der Waals heterostructures, performing nanofabrication, and analyzing data to connect structure with electronic properties, in a highly collaborative METRIQS project with national and international

Competenze

• Background in physics, nanotechnology, materials science, electrical engineering or related field
• Hands-on experience with micro- or nanofabrication or comparable lab work
• Experience with 2D materials, layout/CAD design, electron microscopy or electronic transport is an advantage

Mansioni

• Design superlattice geometries and device layouts using modelling and simulation.
• Assemble hybrid van der Waals heterostructures from graphene, hBN, TMDs with controlled twist and alignment.
• Imprint periodic patterns into 2D materials using nanofabrication techniques.
• Fabricate devices with contacts, gates and measurement capabilities.
• Characterise structure and electronic properties with microscopy, Raman and spectroscopy.
• Connect measured electronic response to the designed superlattice and iterate design.
• Establish reproducible fabrication and measurement protocols and publish results.

Conoscenze

Physics background

Nanofabrication

2D materials

CAD design

Electron microscopy

Electronic transport

Data analysis

Formazione

Master's degree (2-year) or equivalent

Descrizione del lavoro

Job Description

If you want to design the electronic properties of a material rather than simply measure them, this PhD puts the tools in your hands. When two-dimensional crystals are stacked with a controlled twist, or when a periodic pattern is imprinted into them, an artificial superlattice emerges in which the band structure can be reshaped and bandgaps opened by design, using a novel combination of 2D materials and freestanding oxide membranes.

Job Description

If you want to design the electronic properties of a material rather than simply measure them, this PhD puts the tools in your hands. When two-dimensional crystals are stacked with a controlled twist, or when a periodic pattern is imprinted into them, an artificial superlattice emerges in which the band structure can be reshaped and bandgaps opened by design, using a novel combination of 2D materials and freestanding oxide membranes.

You will create such materials yourself in a group that has worked with 2D materials for two decades and with full access to the cleanroom and microscopy infrastructure at DTU Nanolab. The project is part of METRIQS and is carried out together with national and international partners.

Responsibilities And Qualifications
Your overall focus will be to create and control superlattices in graphene and other 2D materials, and to establish how the engineered structure translates into an engineered electronic band structure. You will pursue two complementary routes: assembling hybrid van der Waals heterostructures in which the moiré periodicity is set by twist angle and lattice mismatch and imprinting periodic patterns directly into the 2D material or its supporting layers by nanofabrication. Both routes call for careful design, reproducible processing and close comparison between intended and realised structure. You will work with colleagues at DTU Physics and DTU Nanolab and with partners in the METRIQS collaboration.

Your primary tasks will be to:

• Design superlattice geometries and device layouts, using modelling and simulation to decide what is worth fabricating.
• Assemble hybrid van der Waals heterostructures from graphene, hBN, transition metal dichalcogenides and related materials with controlled twist and alignment, using a newly developed semi-automatic stacking system, and collect data on stacking recipes and results to obtain and document optimal parameters through datamining and statistics.
• Imprint periodic patterns into 2D materials and their supporting layers using electron beam lithography, etching, thin film deposition and related nanofabrication.
• Fabricate devices in which the engineered materials can be contacted, gated and measured.
• Characterise structure and electronic properties by scanning probe microscopies, electron microscopies, Raman spectroscopy, optical spectroscopy and electrical transport at cryogenic temperatures.
• Connect the measured electronic response back to the intended superlattice design, and iterate on the design.
• Establish reproducible fabrication and measurement protocols, analyse your data and present the results in publications and at conferences.

We are looking for a candidate with a background in physics, nanotechnology, materials science, electrical engineering or a related field. You should have hands-on experience with micro- or nanofabrication or comparable experimental laboratory work, and be comfortable with systematic work, data analysis and programming for design, automation or modelling. Experience with 2D materials, layout and CAD design, electron microscopy or electronic transport is an advantage, but the project spans several techniques, and we do not expect you to bring all of them. We value curiosity, persistence and the ambition to take ownership of your own project.

You must have a two-year master's degree (120 ECTS points) or a similar degree with an academic level equivalent to a two-year master's degree.

Approval and Enrolment
The scholarship for the PhD degree is subject to academic approval, and the candidate will be enrolled in one of the general degree programmes at DTU. For information about our enrolment requirements and the general planning of the PhD study programme, please see DTU's rules for the PhD education .

Assessment
The assessment of the applicants will be made by Professor Peter Bøggild and Timothy John Booth.

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and appointment terms
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. Please see DTU’s salary structure for scientific staff: www.inside.dtu.dk/en/human-resources/during-employment/salary/salary-structures .

The period of employment is 3 years. The expected starting date is 1 January 2027, or according to mutual agreement. The position is a full-time position.

You can read more about career paths at DTU here .

Further information
Further information may be obtained from Professor Peter Bøggild, [e-mail] .

You can read more about DTU Physics and DTU Nanolab at https://physics.dtu.dk/ and www.nanolab.dtu.dk .

If you are applying from abroad, you may find useful information on working in Denmark and at DTU at DTU – Moving to Denmark . Furthermore, you have the option of joining our monthly free seminar “ PhD relocation to Denmark and startup “Zoom” seminar ” for all questions regarding the practical matters of moving to Denmark and working as a PhD at DTU.