Low Dimensional Semiconductors

Low Dimensional Semiconductors

Their application in the study of mesoscopic phenomena and in quantum information processing has cemented low-dimensional semiconductors at the forefront condensed matter and materials physics research. The semiconductor based implementation of a solid-state quantum information processing system, where typically the spin configuration of one or a few electrons constitutes a qubit, can be realized through the formation of an array of quantum dots using electrostatic gates over a quantum well created in a semiconductor heterostructure. Our group designs near surface quantum well systems, implements their growth by molecular beam epitaxy, and studies their electronic properties and the noise characteristics of quantum devices.

This work is funded by IARPA

Coupling a superconductor to a semiconductor results in a localized region where charge carriers feel the physics of both materials. A low dimensional semiconductor with large spin-orbit proximity coupled to an s-wave superconductor is predicted to result in a topological superconductor. This new class of material may lead to topological quantum computers. Our group designs superconductor-low dimensional semiconductor heterostructures, implements their growth by molecular beam epitaxy, and studies their electronic properties and transport in mesoscopic devices.

This work is funded by Microsoft Corporation

Researchers

Photo
Professor, ECE and Materials Departments

Epitaxy of dissimilar materials.

Graduate student

- III-V high-mobility growth and devices  

- Heterostructures for topological quantum computing

Graduate Student

- MBE Growth of III-V materials

- Deposition of superconductors onto semiconductors

- Physics of superconductor/semiconductor hybrid systems

- Material systems for topological quantum computing

Postdoctoral Researcher

- Growth and characterization of Heusler compounds

- III-V heterostructures

Postdoctoral Researcher

- Molecular beam epitaxy of semiconductor/superconductor heterostructures

- Quantum transport in nanostructures of the hybrid systems

- Low dimensional nanowire growth

Postdoctoral Researcher

- III-AsSb IR lasers 

- Heuslers compounds 

- Spintronics

- Materials for superconducting qubits

- Chemical beam epitaxy

Graduate Student Researcher

- Molecular Beam Epitaxy (MBE) growth of III-V semiconductor-superconductor heterostructures

- Low temperature optical spectroscopy 

- Scanning tunneling microscopy

- Topological quantum computing

Graduate Student

- Selective area growth (SAG) of low dimensional nanowire arrays

- Chemical beam epitaxy (CBE) 

- Superconductor/semiconductor hybrid systems

- Materials and devices for topological quantum computing