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Welcome to the Yeh Lab

Probing the Depths of Condensed Matter Science and Energy Technologies

Our group specializes in conducting condensed matter experiments with a focus on various scientific and technological aspects. This includes the exploration of correlated electrons, such as high-temperature superconductors and colossal magnetic perovskites. We delve into topological materials, such as topological insulators and superconductors, emphasizing their relevance to quantum information. Additionally, our research extends to low-dimensional systems, encompassing van der Waals materials like graphene, h-BN, and two-dimensional transition-metal dichalcogenides, as well as graphene nanostripes, carbon nanotubes, nanoparticles, and quantum dots.

Furthermore, we actively engage in the study of valleytronics, spintronics based on spin-orbit-coupled materials and half-metallic ferromagnets. Our interests span nanoscience and nanotechnology, involving the instrumentation of scanning probe microscopy for nanoscale characterization, the nanofabrication of electronic, optoelectronic, valleytronic, and spintronic devices, and the nanoscale strain engineering of graphene and transition-metal dichalcogenides. Lastly, we contribute to energy research by investigating energy conversion in photovoltaic and fuel cells, as well as the development of supercapacitors and lithium-ion batteries for energy storage.

Principle Investigator: Nai-Chang Yeh

Thomas W. Hogan Professor of Physics, California Institute of Technology

Ph.D., Massachusetts Institute of Technology
B.Sc., National Taiwan University

Nai-Chang Yeh is currently the Thomas W. Hogan Professor of Physics at the California Institute of Technology (Caltech). Her principal research field is experimental condensed matter physics, with special emphasis on quantum materials, quantum devices, nanoscience, and nanotechnology. Her research group currently engages in studies of the science and technology of correlated electrons, topological materials, low-dimensional systems, valleytronics, spintronics, optoelectronics, nanophotonics, nanoscience, nanotechnology, and energy research. To date she has over 160 papers published in refereed scientific journals and one book chapter published by World Scientific Publishing Company, has been awarded 9 patents, and has also published an autobiography (in Chinese) with Business Weekly in Taiwan.

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The support for our research is graciously provided by the following funding agencies.

Condensed Matter Physics, Caltech. 1200 E. California Blvd., Pasadena, CA 91125, USA.