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arXiv · 2009.14618

CuTe chains on Cu(111) by deposition of 1/3 ML Te: atomic and electronic structure

Tilman Kißlinger·Andreas Raabgrund·Begmuhammet Geldiyev·Maximilian Ammon·Janek Rieger·Jonas Hauner·Lutz Hammer·Thomas Fauster·M. Alexander Schneider
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Abstract

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.

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Tilman Kißlinger, Andreas Raabgrund, Begmuhammet Geldiyev, Maximilian Ammon, Janek Rieger, Jonas Hauner, Lutz Hammer, Thomas Fauster, M. Alexander Schneider. 2020-09-30. CuTe chains on Cu(111) by deposition of 1/3 ML Te: atomic and electronic structure. https://doi.org/10.1103/physrevb.102.155422

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