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Jay Deep Sau

Associate Professor, JQI Co-Director

Profile photo of Jay Deep Sau

Contact Information



2308 John S. Toll Physics Building

College Park, MD 20742

Office Phone:
(301) 405-8463

Research Groups

Recent News

  • Yellow and blue petals in a row

    Electrons Take New Shape Inside Unconventional Metal

    January 9, 2023

    One of the biggest achievements of quantum physics was recasting our vision of the atom. Out was the early 1900s model of a solar system in miniature. Instead, quantum physics showed that electrons meander around the nucleus in clouds that look like tiny balloons. These balloons are known as atomic orbitals, and they come in all sorts of different shapes—perfectly round, two-lobed, clover-leaf-shaped. That’s all well and good for individual atoms, but when atoms come together to form something solid—like a chunk of metal, say—the outermost electrons in the atoms link arms and lose sight of the nucleus they came from, forming many oversized balloons that span the whole chunk of metal. Now, researchers have produced the first experimental evidence that one metal—and likely others in its class—have electrons that manage to preserve a more interesting, multi-lobed structure as they move around in a solid.

  • Jay Sau sets in an office in front of a picture frame and framed artistic representation of the Latin alphabet.

    Sau Named UMD Co-Director of JQI

    January 14, 2022

    JQI Fellow Jay Sau has been appointed the newest UMD Co-Director of JQI. He assumed the role on January 1, 2022.

  • Two hexagonal grids are twisted relative to each other to create hexagonal snowflake-like repeating patterns against a blue background.

    Graphene’s Magic Act Relies on a Small Twist

    October 18, 2021

    Atomically thin sheets of carbon, called graphene, have caught many scientists' attention in recent years. Researchers have discovered that stacking layers of graphene two or three at a time and twisting the layers opens fertile new territory for them to explore. Research into these stacked sheets of graphene is like the Wild West, complete with the lure of striking gold and the uncertainty of uncharted territory. Researchers at JQI and the Condensed Matter Theory Center (CMTC) at the University of Maryland are busy creating the theoretical physics foundation that will be a map of this new landscape. And there is a lot to map; the phenomena in graphene range from the familiar like magnetism to more exotic things like strange metallicity, different versions of the quantum Hall effect, and the Pomeranchuk effect—each of which involve electrons coordinating to produce unique behaviors. One of the most promising veins for scientific treasure is the appearance of superconductivity (lossless electrical flow) in stacked graphene.