Moiré Materials

MacDonald

A.H. MacDonald*

1Physics Department, University of Texas at Austin, Austin TX 78712

As an undergraduate student at St. Francis Xavier University in Nova Scotia, Canada (that’s where I’m from), I started out thinking that I was interested in mathematics. As I learned a bit about math and science, I eventually realized that what attracted me most was applications of mathematics. I remember being turned on when I started to understand that people really could build mathematical models of the world around us that correctly predicted completely unexpected and unknown behaviors. And I knew that building the models was fun. I had a few ideas for graduate studies including economics which I loved as an undergraduate. I chose physics because my girlfriend at the time, now my spouse, worked at a hospital attached to the University of Toronto’s downtown campus that was across the street from the physics department. It turned out to be a doubly good choice for me.

Prior to joining the faculty of UT Austin in 2000 (that also turned out to be a good choice for me), I spent a number of very enjoyable years working at the National Research Council of Canada’s Research Labs and at Indiana University. I have now been working on the theory of condensed matter for more than 30 years. I still wake up in the morning anticipating the pleasure and privilege of spending my day thinking about new possibilities for unexpected and unknown behavior in condensed matter, and working with interesting young people finding their own directions in science.

Moiré Materials​

When a moiré pattern is formed by overlaying 2D semimetals or semiconductors with a twist or a difference in lattice constant, low-energy electrons and long-wavelength excitonic collective models are accurately described by periodic Hamiltonians with lattice constants on the 10 nm scales.  2D electron systems of this type have become known as moiré materials, which act like artificial crystals in which the number of electrons per effective atom can be electrically varied by around 10 – effectively moving through the moiré material periodic table.  In recent years moiré materials have emerged as a powerful platform for fundamental physics studies of strongly correlated matter, especially strongly correlated topological matter.  I will discuss different strategies for deriving moiré material effective Hamiltonians, and review some of the rich physics that has been observed in this materials platform.

Congress Registration

Early Bird Payment

August 31, 2025

Abstract Submission

Abstract submission deadline

June 22, 2025

Key Dates

Abstract Submision Deadline:

June 22, 2025

Intercovamex Award Best PhD and Master´s Thesis:

August 31, 2025

Student grant application deadline:

July 4, 2025

Franscisco Mejia Lira Award:

August 31, 2025

Early Bird payment:

August 31, 2025

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