| Autor: |
Kißlinger, Tilman, Raabgrund, Andreas, Geldiyev, Begmuhammet, Ammon, Maximilian, Rieger, Janek, Hauner, Jonas, Hammer, Lutz, Fauster, Thomas, Schneider, M. Alexander |
| Rok vydání: |
2020 |
| Předmět: |
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| Zdroj: |
Phys. Rev. B 102, 155422 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevB.102.155422 |
| Popis: |
The surface atomic and electronic structure after deposition of 1/3 monolayer (ML) Te on Cu(111) was determined using a combination of low-energy electron diffraction (LEED), scanning tunneling microscopy and spectroscopy (STM/STS), angle-resolved single and two-photon photoelectron spectroscopy (ARPES /AR-2PPE) and density functional theory (DFT) calculations. Contrary to the current state in literature Te does not create a two-dimensional surface alloy but forms Cu$_2$Te$_2$ adsorbate chains in a $\left(2\sqrt{3} \times \sqrt{3}\right)\textrm{R30}^\circ$ superstructure. We establish this by a high-precision LEED-IV structural analysis with Pendry $R$ factor of $R = 0.099$ and corroborating DFT and STM results. The electronic structure of the surface phase is dominated by an anisotropic downward dispersing state at the Fermi energy $E_F$ and a more isotropic upward dispersing unoccupied state at $E-E_F = + 1.43\,\textrm{eV}$. Both states coexist with bulk states of the projected band structure and are therefore surface resonances. |
| Databáze: |
arXiv |
| Externí odkaz: |
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