Journal or Book Title
Physical Review B
Using electron diffraction, we show that free-electron metals, such as sodium and potassium, form a highly regular quasiperiodic monolayer on the fivefold surface of icosahedral Al-Pd-Mn and that the quasiperiodicity propagates up to the second layer in sodium. Our photoelectron spectroscopy results show that the quasicrystalline alkali-metal adlayer does not exhibit a pseudogap near the Fermi level thought to be characteristic for the electronic structure of quasicrystalline materials. Calculations based on density functional theory provide a model structure for the quasicrystalline alkali-metal monolayer and confirm the absence of a pseudogap.
American Physical Society
Shukla, A. K.; Dhaka, R. S.; D'Souza, S. W.; Singh, Sanjay; Wu, D.; Lograsso, Thomas A.; Krajčí, M.; Hafner, J.; Horn, K.; and Barman, S. R., "Quasiperiodic layers of free-electron metals studied using electron diffraction" (2009). Ames Laboratory Publications. 62.