University of Minnesota Researchers Achieve Atomic Control Over Metal Properties
Researchers at the University of Minnesota Twin Cities have discovered a novel method to manipulate the electronic properties of metals by engineering atomic interactions at the interface of two materials. This breakthrough, published in Nature Communications, involves the use of interfacial polarization to adjust the surface work function of metallic ruthenium dioxide (RuO2) by more than 1 electron volt (eV). The team achieved this by altering the thickness of an ultra-thin film by just a few nanometers. Traditionally, polarization is associated with insulators and ferroelectrics, but the researchers have demonstrated its stabilization within a metallic system, allowing for significant control over electronic behavior. The most notable changes were observed when the ruthenium dioxide film reached a thickness of approximately 4 nanometers, leading to a transition from a strained to a more relaxed atomic arrangement. 
