Quantum materials – including superconductors, magnets, and topological insulators – exhibit properties that are unavailable in the materials we use in everyday technology. Although the incredible properties of these materials have the potential to revolutionize how we manipulate information and energy, their potential remains largely untapped. Our group is focused on identifying, understanding and controlling untamed quantum materials in order to realize this potential.

New Electronic Phenomena

We conduct electronic, magnetic and thermal characterization of quantum materials in order to identify and understand their emergent properties. We perform proof-of-principle experiments which illustrate the potential of these materials in next-generation information processing technologies.

Illustration of a quantum material: a faceted crystal with three callout circles magnifying the electronic states inside it — a pair of oppositely aligned spins coupled across an orbital, a lattice of alternating up and down spins, and a Dirac cone whose upper branch carries arrows circulating around it.

Strain Control

We use strain to control and probe the properties of quantum materials. Modest strains can radically transform the properties of materials by driving a phase transition to a new state of matter. The response of a material to strain also encodes information about the electronic ground state which may be used as a fingerprint — allowing us to pinpoint the symmetry of new quantum materials through its coupling to strain.

Scanning electron micrograph of a wire-bonded CoNbSe2 device: a lithographically patterned chip held in epoxy, with bond wires running out to contact pads around its edge.

Quantum Sensing

We design bespoke superconducting sensors and use them to probe material properties which are inaccessible with conventional techniques. These sensors allow us to interrogate ultra-small samples which are too small for traditional measurements.

Schematic of the sensing geometry: a micrograph of a micro/nanoscale quantum material patterned on the underside of a substrate, which is held on standoffs a short distance above a sensor chip carrying a superconducting sensor, shown enlarged as a pyramidal structure with the sensor track running over it.