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Coupling quantum corrals to form arti ficial molecules

by S.E. Freeney, S.T.P. Borman, J.W. Harteveld and I. Swart

Submission summary

As Contributors: Ingmar Swart
Preprint link: scipost_202008_00008v1
Date submitted: 2020-08-14 19:46
Submitted by: Swart, Ingmar
Submitted to: SciPost Physics
Discipline: Physics
Subject area: Quantum Physics
Approaches: Experimental, Computational

Abstract

Quantum corrals can be considered as artificial atoms. By coupling many quantum corrals together, artificial matter can be created at will. The atomic scale precision with which the quantum corrals can be made grants the ability to tune parameters that are difficult to control in real materials, such as the symmetry of the states that couple, the on-site energy of these states, the hopping strength and the magnitude of the orbital overlap. Here, we systematically investigate the accessible parameter space for the dominant platform (CO molecules on Cu(111)) by constructing (coupled) quantum corrals of different sizes and shapes. By changing the configuration of the CO molecules that constitute the barrier between two quantum corrals, the hopping integral can be tuned between 0 and -0.3 eV for s- and p-like states, respectively. Incorporation of orbital overlap is essential to account for the experimental observations. Our results aid the design of future artificial lattices.

Current status:
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Submission scipost_202008_00008v1 on 14 August 2020

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