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MSE Seminar: “VdW Heterostructures: A New Route to Designing Quantum Material” (Princeton University)

March 21 at 10:30 AM - 12:00 PM

From superconductivity to fractionalized particles, fascinating phenomena arise in quantum materials due to the collective behaviors of electrons. These quantum effects challenge our understanding of nature and open up new possibilities for future technologies in quantum information. In my talk, I will discuss the use of van der Waals (vdW) heterostructures to create new quantum materials. These heterostructures, made by mechanically assembling layers of two-dimensional materials together, offer a new way to create quantum matter and break through traditional material synthesis limitations.

I will present two examples of this approach. In the first example, I will illustrate how Coulomb interactions across separate atomic layers pair fermions (electrons and holes) into bosons to achieve a superfluid condensate state. The second example will introduce the concept of moiré band engineering, where the interference between two atomic lattices reforms electronic band structures and creates new electronic orders. Finally, I will briefly discuss applications of local probe techniques to uncover hidden quantum properties in vdW platforms and share visions of leveraging rich interplays across atomic interfaces to create new quantum states of matter, new quantum devices, and new local measurements.

Xiaomeng Liu

Postdoctoral Fellow, Princeton University

Xiaomeng Liu is a PCCM (Princeton Center for Complex Materials) postdoctoral fellow in Professor Ali Yazadani’s group at Princeton University. He did his undergraduate study at Peking University and obtained his Ph.D. from Harvard University working with Professor Philip Kim, where he focused on creating new quantum states of matter in heterostructures of two-dimensional materials. His current research is dedicated to using scanning tunneling microscopes to study and understand quantum phenomena in two-dimensional materials. He recently received the 2023 Lee Osheroff Richardson (LOR) Science Prize.


March 21
10:30 AM - 12:00 PM
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Materials Science and Engineering
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Glandt Forum, Singh Center for Nanotechnology
3205 Walnut Street
Philadelphia, PA 19104 United States
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