Prof. Dr. James Analytis

University of California, Berkeley, USA

James Analytis joined the Berkeley faculty in 2013 as the Charles Kittel Chair in condensed matter physics, and served as Department Chair from 2020-2023. He received his B.Sc. in physics from Canterbury University in 2001 and his D. Phil. from the University of Oxford in 2006. Following his graduate studies, Analytis was a Lloyd's Tercentenary Fellow at the University of Bristol, where he worked on understanding the nature of anisotropic scattering in cuprate superconductors. In 2008 he became a postdoctoral fellow at Stanford University where he worked on both pnictide superconductors and topological insulators. Analytis' current interests are unconventional superconductors, quantum critical systems, frustrated magnets and topological spintronics.

Thursday, March 26

14:45

Abstract

FIB-Assisted Nanoscale Materials Synthesis

Achieving deterministic control over the properties of low-dimensional materials with nanoscale precision is a long-sought goal. Mastering this capability has a transformative effect on the design of multifunctional electrical and optical devices. Here, we present an ion-assisted synthetic technique that enables precise control over the material composition and energy landscape of two-dimensional (2D) atomic crystals. Our method transforms binary transition-metal dichalcogenides, like MoSe2, into ternary MoS2αSe2(1−α) alloys with systematically adjustable compositions, α. By piecewise assembly of the lateral, compositionally modulated MoS2αSe2(1−α) segments within 2D atomic layers, we present a synthetic pathway toward the realization of multicompositional designer materials. Our technique enables the fabrication of advanced 2D structures with arbitrary boundaries, dimensions as small as 30 nm, and fully customizable energy landscapes. Our optical characterizations further showcase the potential for implementing tailored optoelectronics in these engineered 2D crystals.

Biography

James Analytis joined the Berkeley faculty in 2013 as the Charles Kittel Chair in condensed matter physics, and served as Department Chair from 2020-2023. He received his B.Sc. in physics from Canterbury University in 2001 and his D. Phil. from the University of Oxford in 2006. Following his graduate studies, Analytis was a Lloyd's Tercentenary Fellow at the University of Bristol, where he worked on understanding the nature of anisotropic scattering in cuprate superconductors. In 2008 he became a postdoctoral fellow at Stanford University where he worked on both pnictide superconductors and topological insulators. Analytis' current interests are unconventional superconductors, quantum critical systems, frustrated magnets and topological spintronics.