Gey-Hong Gweon's Research

Electron spectroscopy on novel emergent materials

The past half century might be called a Si era, in the practical sense that the Si industry changed our world through a communication revolution. In condensed matter physical terms, it was an era that the celebrated Fermi liquid theory, in which a system of interacting electrons can be replaced by a system of non-interaction electron-like quantum excitations or Landau quasi-particles, provided a bedrock principle on which textbook condensed matter physics principles, such as semiconductor theory, has been built.

However, there is a widespread recognition in the contemporary condensed matter physics field that the existing paradigm of the Fermi liquid theory is only one possible state, and there are many yet un-characterized ground states that are wildly – i.e. qualitatively – different from Fermi liquid ground states. These new states of matter are closely connected with competing phases such as those found in novel materials including high temperature superconductors, colossal magneto-resistant materials, and rare earth inter-metallic materials. Understanding these new states are undoubtedly the big task of condensed matter physics. In Gey-Hong Gweon’s group, research is focused on novel emergent materials that show a variety of ground state properties, which are very often non-Fermi liquid states.

My Ph.D. thesis may be of interest to people concerned with ARPES.  The thesis is available as a pdf file, in 4 different formats: double-sided US letter, single-sided US letter, doubled-sided A4, and single-sided A4.

Quite a few of my papers published since 1999 (my Ph.D. year) can be found here.

Contact: gweon at ucsc.edu or gweon at umich.edu