Abstract
We report the successful stabilization of a thick bulk-like, distorted $\alpha$-Mn film with (110) orientation on a W(110) substrate. The observed $(3\times3)$ overstructure for the Mn film with respect to the original W(110) low-energy electron diffraction pattern is consistent with the presented structure model. The possibility to stabilize such a pseudomorphic Mn film is supported by density functional total energy calculations. Angle-resolved photoemission spectra of the stabilized $\alpha$-Mn(110) film show weak dispersions of the valence band electronic states in accordance with the large unit cell.
Highlights
ManganeseMncan be considered as the most complex of all metallic elements from the crystallographic point of view
We report the successful stabilization of a thick bulklike distorted ␣-Mn film with110͒ orientation on a W110͒ substrate
Density-functional total-energy calculations confirm that this structure, a strained ␣-Mn phase, is close in energy to the ground-state phase and can be prepared under carefully controlled conditions
Summary
ManganeseMncan be considered as the most complex of all metallic elements from the crystallographic point of view. Depending on temperature and pressure, it exists in five allotropic forms.2–4 ␣-Mn, the stable phase below 1000 K, has an exotic bcc crystal structure containing 58 atoms in the conventional cubic unit cellFig. 1͑a͒. Concerning the study of electronic properties, all 3d metals except Mn were routinely investigated by means of photoelectron spectroscopy with angle as well as spin resolution.. Concerning the study of electronic properties, all 3d metals except Mn were routinely investigated by means of photoelectron spectroscopy with angle as well as spin resolution.18,19 This lack of photoemissionPEdata for Mn seems surprising but might be due to the complicated crystal structure of ␣-Mn, epitaxial growth of Mn overlayers would be a possible way to obtain crystalline bulklike samples. The energy resolution of the analyzer was set to 50 and 500 meV for UPS and XPS, respectively
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