Collective tunneling of a Wigner necklace in carbon nanotubes

Dominik Szombathy, Miklós Antal Werner, Cǎtǎlin Paşcu Moca, Örs Legeza, Assaf Hamo, Shahal Ilani, Gergely Zaránd

Research output: Contribution to journalArticlepeer-review

Abstract

The collective tunneling of a Wigner necklace - a crystal-like state of a small number of strongly interacting electrons confined to a suspended nanotube and subject to a double-well potential - is theoretically analyzed and compared with experiments in Shapir et al. [Science 364, 870 (2019)0036-807510.1126/science.aat0905]. Density matrix renormalization group computations, exact diagonalization, and instanton theory provide a consistent description of this very strongly interacting system, and show good agreement with experiments. Experimentally extracted and theoretically computed tunneling amplitudes exhibit a scaling collapse. Collective quantum fluctuations renormalize the tunneling, and substantially enhance it as the number of electrons increases.

Original languageEnglish
Article number245139
JournalPhysical Review B
Volume109
Issue number24
DOIs
StatePublished - 15 Jun 2024
Externally publishedYes

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© 2024 American Physical Society.

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