Unconventional Ferroelectricity in Moiré Heterostructures

ORAL · Invited

Abstract

The understanding of strongly-interacting quantum matter has challenged physicists for decades. The discovery six years ago of correlated phases and superconductivity in magic angle twisted bilayer graphene has led to the emergence of a new materials platform to investigate strongly interacting physics, namely moiré quantum matter. These systems exhibit a plethora of quantum phases, such as correlated insulators, superconductivity, magnetism, and more. In this talk I will review some of the recent advances in the field, focusing on the discovery of different types of unconventional ferroelectricity in novel moiré heterostructuresnewest. In particular I will discuss stacking engineered ferroelectricity in bilayer boron nitride systems, as well as a novel ferroelectricity of electronic origin. I will end the talk with an outlook of some exciting directions in this emerging field.

* This work was primarily supported by the Center for the Advancement of Topological Semimetals, an Energy Frontier Research Center funded by the US Department of Energy Office of Science, through the Ames Laboratory under contract DE-AC02-07CH11358, by the Gordon and Betty Moore Foundations EPiQS Initiative through Grant GBMF9463 to PJH, by the AFOSR grant FA9550-21-1-0319, by the Army Research Office through grant #W911NF1810316, by the MIT/MTL-Samsung Semiconductor Research Program, and by the Ramon Areces Foundation.

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Publication: arXiv:2306.03922 (2023)
Nature Nanotechnology 17, 367–371 (2022)
Science 372, 1458-1462 (2021)

Presenters

  • Pablo Jarillo-Herrero

    Massachusetts Institute of Technology MI, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology

Authors

  • Pablo Jarillo-Herrero

    Massachusetts Institute of Technology MI, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology