High-quality two-dimensional heterostructural device: from materials synthesis to device fabrication
Project Description
Two-dimensional (2D) materials have emerged as a versatile platform for exploring rich physics and diverse electronic, and optoelectronic applications. Recent research suggests that precise control over twisting angles and the quality of the stacking interface are crucial factors influencing the transport performance of 2D devices. For instance, the observation of fractional quantum anomalous Hall effect, reported in exfoliated materials, was only possible in high-quality devices. The Principal Investigator's (PI) laboratory has established itself as a leading group in synthesizing high-quality 2D materials. Moreover, the lab has recently developed a homemade 2D device fabrication setup within a glovebox. This project aims to systematically investigate the synthesis of high-quality 2D materials, the fabrication of high-quality 2D devices, and more importantly explore the emerging properties of the fabricated 2D devices.
Supervisor
LEI, Shiming
Quota
2
Course type
UROP1000
UROP1100
UROP2100
UROP3100
UROP4100
Applicant's Roles
1. Synthesize a diverse range of high-quality single-crystalline van der Waals crystals, focusing on achieving single-phase and high crystalline quality.
2. Characterize the synthesized crystals by determining their structure, composition, magnetic ordering temperature, and constructing a magnetic field-temperature phase diagram.
3. Conduct preliminary electrical transport measurements on the synthesized crystals to assess their quality and phase correctness, using the obtained results as feedback to optimize the growth conditions further.
4. Explore the optimal conditions for exfoliating the grown 2D materials, considering factors such as adhesion, thickness control, and preservation of material properties.
5. Investigate the fabrication process of 2D devices, aiming to optimize their performance. This includes understanding the parameters influencing device performance, such as contact resistance, interface quality, and device geometry.
2. Characterize the synthesized crystals by determining their structure, composition, magnetic ordering temperature, and constructing a magnetic field-temperature phase diagram.
3. Conduct preliminary electrical transport measurements on the synthesized crystals to assess their quality and phase correctness, using the obtained results as feedback to optimize the growth conditions further.
4. Explore the optimal conditions for exfoliating the grown 2D materials, considering factors such as adhesion, thickness control, and preservation of material properties.
5. Investigate the fabrication process of 2D devices, aiming to optimize their performance. This includes understanding the parameters influencing device performance, such as contact resistance, interface quality, and device geometry.
Applicant's Learning Objectives
1. Acquire knowledge and expertise in growing high-quality, single-phase, single-crystalline quantum materials.
2. Learn how to evaluate the lattice parameter and phase purity of grown materials.
3. Learn how to evaluate the magnetic properties of grown quantum materials.
4. Learn how to perform electrical transport measurements.
5. Acquire skills in scientific data analysis and data visualization.
6. Understand the thermodynamics and kinetics of crystal growth
7. Learn the skills of 2D device fabrication
2. Learn how to evaluate the lattice parameter and phase purity of grown materials.
3. Learn how to evaluate the magnetic properties of grown quantum materials.
4. Learn how to perform electrical transport measurements.
5. Acquire skills in scientific data analysis and data visualization.
6. Understand the thermodynamics and kinetics of crystal growth
7. Learn the skills of 2D device fabrication
Complexity of the project
Moderate