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Elena Torres, Institute of Fundamental Physics, Madrid, Spain
Thursday 02 November 2023, 15:00-16:00
The stochastic wave function method for diffusion of alkali atoms on metallic surface
- đ¤ Speaker: Elena Torres, Institute of Fundamental Physics, Madrid, Spain
- đ Date & Time: Thursday 02 November 2023, 15:00 - 16:00
- đ Venue: Mott Seminar Room, Cavendish Laboratory
Abstract
The stochastic wave function method is proposed to study the diffusion regimes of alkali atoms on metallic surfaces. The Lindblad approach, based on the microscopic Hamiltonian information in the Caldeira-Leggett model, is presented, and numerical calculations of the dynamics are carried out to characterize surface diffusion for two different systems: Na-Cu(111) and Li-Cu(111). The intermediate scattering functions obtained from numerical simulations for an isolated adsorbate are compared, in the Brownian limit, with results deduced from helium spin-echo (HeSE) experiments after reducing them to a single adsorbate dynamics. To illustrate the method, we present the dependence on momentum transfer and the temperature dependency. Results show that the 1-D quantum model (reduced dimensionality) can describe the experiment at a quantitative level.
Series This talk is part of the Physics and Chemistry of Solids Group series.
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