Yazdani Lab

Harnessing the power of quantum microscopy techniques

A goal at the forefront of condensed matter physics is understanding how quantum phases of matter emerge from interactions among electrons or from topological properties of electronic states. These quantum phases can have novel electronic properties and host unusual quasiparticles, the control and manipulation of which may lead to new quantum technologies.

Our group's focus is to harness the power of high-resolution scanning quantum microscopy techniques to understand such novel phases of matter. These studies have provided information that is impossible to obtain using conventional macroscopic averaging techniques typically used in condensed matter physics. For example, scanning tunneling microscopy (STM) techniques can directly visualize electronic wavefunctions in quantum materials, allowing us to understand the nature of new quantum phases and their excitations.

Our group not only applies well established techniques of quantum microscopy across a wide range of material platforms, but we also develop new microscopy methods and tools.

Recent Highlight

a scanning tunneling microscope imaging the magic-angle twisted bilayer graphene

To get the desired quantum effect, the researchers placed two sheets of graphene on top of each other with the top layer twisted at the “magic” angle of 1.1 degrees, which creates a moiré pattern. This diagram shows a scanning tunneling microscope imaging the magic-angle twisted bilayer graphene.

Strongly correlated Chern insulators in magic-angle twisted bilayer graphene

Interactions between electrons and the topology of their energy bands can create unusual quantum phases of matter. Most topological electronic phases appear in systems with weak electron–electron interactions. Read more.

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Cover of Nature December 2020

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