Tag: Shandong University
Understanding field scattering in AlGaN/GaN heterostructure field-effect transistors
Field-effect transistors featuring stacked layers of semiconductors are important elements of many electrical devices, especially in wireless communication systems. Through a series of studies, research led by Professor Zhaojun Lin at Shandong University, China, has identified one particular mechanism driving an unavoidable limitation in these devices. By drawing from their new theoretical description of ‘polarisation Coulomb field scattering’, the team […]
Read More… from Understanding field scattering in AlGaN/GaN heterostructure field-effect transistors
Highly efficient modelling of electronic structure
Chemistry can be defined as the study of electron motion in the field of nuclei, which obeys the rules of quantum dynamics. The electronic structure of a given system of N electrons is best described by an N-electron wave function built up with one-electron wave functions (orbitals) subject to the antisymmetry principle. The major issue is that the orbitals may […]
Read More… from Highly efficient modelling of electronic structure
Keplerian nest of polyhedral structures in different symmetry groups
Research being carried out by Professor Di Sun, from Shandong University, and Professor Stan Schein, from UCLA, unites two research streams. In the first, they synthesized Ag90, a Keplerian nest with one icosahedral and two octahedral shells. In the second, they realized that the nesting maximized the number of shared axes of rotation, just how the late mathematician John Conway […]
Read More… from Keplerian nest of polyhedral structures in different symmetry groups