Emulating tightly bound electrons in crystalline solids using mechanical waves
| Autor: | R. A. Méndez-Sánchez, Emerson Sadurni, E. Flores-Olmedo, F. Ramírez-Ramírez, G. Báez |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Electronic properties and materials
Solid-state physics lcsh:Medicine FOS: Physical sciences Mechanical properties Electron 01 natural sciences Molecular physics Article 03 medical and health sciences Resonator 0302 clinical medicine Atomic orbital Physics - Chemical Physics 0103 physical sciences Exponential decay lcsh:Science 010306 general physics Electronic band structure Quantum tunnelling Chemical Physics (physics.chem-ph) Physics Condensed Matter - Materials Science Quantum Physics Multidisciplinary lcsh:R Materials Science (cond-mat.mtrl-sci) lcsh:Q Quantum Physics (quant-ph) Mechanical wave 030217 neurology & neurosurgery |
| Zdroj: | Scientific Reports Scientific Reports, Vol 10, Iss 1, Pp 1-7 (2020) |
| Popis: | Solid state physics deals with systems composed of atoms with strongly bound electrons. The tunneling probability of each electron is determined by interactions that typically extend to neighboring sites, as their corresponding wave amplitudes decay rapidly away from an isolated atomic core. This kind of description is essential to material science, and it rules the electronic transport properties of metals, insulators and other condensed matter systems. The corresponding phenomenology is well captured by tight-binding models, where the electronic band structure emerges from atomic orbitals of isolated atoms plus their coupling to neighboring sites in a cristal. In this work, a mechanical system that emulates dynamically a tightly bound electron is built. This is done by connecting mechanical resonators via locally periodic aluminum bars acting as couplers. When the frequency of a particular resonator lies within the frequency gap of a coupler, the vibrational wave amplitude imitates a bound electron orbital. The localization of the wave at the resonator site and its exponential decay along the coupler are experimentally verified. The quantum dynamical tight-binding model and frequency measurements in mechanical structures show an excellent agreement. 15 pages, 3 figures |
| Databáze: | OpenAIRE |
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