A stable polymer of urea, polyuret, with nonbonding flat bands, was characterized by means of spectroscopic measurements and theoretical calculations. Polyuret takes a cis-form in the solid state with P21/c space group, in which adjacent main chains interact with each other through hydrogen bonds. DFT calculations show the presence of well-defined flat bands that form the highest occupied crystal orbitals, making polyuret a suitable candidate for prospective applications in designing for new types of magnetic materials.
- Yiming Liu
- Masashi Hatanaka
- Makoto Miyasaka
