Enforced Long-Range Order in 1D Wires by Coupling to Higher Dimensions

One-dimensional wires are known to be inherently unstable at finite temperature. Here, we show that long-range order of atomic Au double chains adsorbed on a Si(553) surface is not only stabilized by interaction with the substrate, but spontaneous self-healing structural defects actually enforced adsorption species such as or H. This true even for random adsorbate distribution. Combining atomistic models within density functional theory low energy electron diffraction and high-resolution loss spectroscopy, demonstrate this apparently counterintuitive behavior mainly caused adsorption-induced band filling modified bands, i.e., strong electronic correlation throughout whole terrace. Although preferably occurs step edge, it enhances dimerization stiffness dimers. Thus, intertwinement quasi-1D properties delocalized 2D effects enforces wire order.