2023
DOI: 10.1088/1361-648x/ad146f
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Size effects on atomic collapse in the dice lattice

D O Oriekhov,
S O Voronov

Abstract: We study the role of size effects on atomic collapse of charged impurity in the flat band system. The tight-binding simulations are made for the dice lattice with circular quantum dot shapes. It is shown that the mixing of in-gap edge states with bound states in impurity potential leads to increasing the critical charge value. This effect, together with enhancement of gap due to spatial quantization, makes it more difficult to observe the dive-into-continuum phenomenon in small quantum dots. At the same time, … Show more

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Cited by 2 publications
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References 51 publications
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