Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube

Research output: Contribution to journal › Journal article › Research › peer-review

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Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube. / Pecker, S.; Kuemmeth, Ferdinand; Secchi, A.; Rontani, M.; Ralph, D.C.; McEuen, P.L.; IIani, S.

In: Nature Physics, Vol. 9, 28.07.2013, p. 576-581.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Pecker, S, Kuemmeth, F, Secchi, A, Rontani, M, Ralph, DC, McEuen, PL & IIani, S 2013, 'Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube', Nature Physics, vol. 9, pp. 576-581. https://doi.org/10.1038/nphys2692

APA

Pecker, S., Kuemmeth, F., Secchi, A., Rontani, M., Ralph, D. C., McEuen, P. L., & IIani, S. (2013). Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube. Nature Physics, 9, 576-581. https://doi.org/10.1038/nphys2692

Vancouver

Pecker S, Kuemmeth F, Secchi A, Rontani M, Ralph DC, McEuen PL et al. Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube. Nature Physics. 2013 Jul 28;9:576-581. https://doi.org/10.1038/nphys2692

Author

Pecker, S. ; Kuemmeth, Ferdinand ; Secchi, A. ; Rontani, M. ; Ralph, D.C. ; McEuen, P.L. ; IIani, S. / Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube. In: Nature Physics. 2013 ; Vol. 9. pp. 576-581.

Bibtex

@article{7630ab7620484d1386196499b97df5c4,
title = "Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube",
abstract = "Two electrons on a string form a simple model system where Coulomb interactions are expected to play an interesting role. In the presence of strong interactions, these electrons are predicted to form a Wigner molecule, separating to the ends of the string. This spatial structure is believed to be clearly imprinted on the energy spectrum, yet so far a direct measurement of such a spectrum in a controllable one-dimensional setting is still missing. Here we use an ultraclean carbon nanotube to realize this system in a tunable potential. Using tunnelling spectroscopy we measure the addition spectra of two interacting carriers, electrons or holes, and identify seven low-energy states characterized by their exchange symmetries. The formation of a Wigner molecule is evident from a tenfold quenching of the fundamental excitation energy as compared with the non-interacting value. Our ability to tune the two-carrier state in space and to study it for both electrons and holes provides an unambiguous demonstration of this strongly interacting quantum ground state.",
author = "S. Pecker and Ferdinand Kuemmeth and A. Secchi and M. Rontani and D.C. Ralph and P.L. McEuen and S. IIani",
note = "Preprint available at http://arxiv.org/abs/1302.1877.",
year = "2013",
month = jul,
day = "28",
doi = "10.1038/nphys2692",
language = "English",
volume = "9",
pages = "576--581",
journal = "Nature Physics",
issn = "1745-2473",
publisher = "nature publishing group",

}

RIS

TY - JOUR

T1 - Observation and spectroscopy of a two-electron Wigner molecule in an ultraclean carbon nanotube

AU - Pecker, S.

AU - Kuemmeth, Ferdinand

AU - Secchi, A.

AU - Rontani, M.

AU - Ralph, D.C.

AU - McEuen, P.L.

AU - IIani, S.

N1 - Preprint available at http://arxiv.org/abs/1302.1877.

PY - 2013/7/28

Y1 - 2013/7/28

N2 - Two electrons on a string form a simple model system where Coulomb interactions are expected to play an interesting role. In the presence of strong interactions, these electrons are predicted to form a Wigner molecule, separating to the ends of the string. This spatial structure is believed to be clearly imprinted on the energy spectrum, yet so far a direct measurement of such a spectrum in a controllable one-dimensional setting is still missing. Here we use an ultraclean carbon nanotube to realize this system in a tunable potential. Using tunnelling spectroscopy we measure the addition spectra of two interacting carriers, electrons or holes, and identify seven low-energy states characterized by their exchange symmetries. The formation of a Wigner molecule is evident from a tenfold quenching of the fundamental excitation energy as compared with the non-interacting value. Our ability to tune the two-carrier state in space and to study it for both electrons and holes provides an unambiguous demonstration of this strongly interacting quantum ground state.

AB - Two electrons on a string form a simple model system where Coulomb interactions are expected to play an interesting role. In the presence of strong interactions, these electrons are predicted to form a Wigner molecule, separating to the ends of the string. This spatial structure is believed to be clearly imprinted on the energy spectrum, yet so far a direct measurement of such a spectrum in a controllable one-dimensional setting is still missing. Here we use an ultraclean carbon nanotube to realize this system in a tunable potential. Using tunnelling spectroscopy we measure the addition spectra of two interacting carriers, electrons or holes, and identify seven low-energy states characterized by their exchange symmetries. The formation of a Wigner molecule is evident from a tenfold quenching of the fundamental excitation energy as compared with the non-interacting value. Our ability to tune the two-carrier state in space and to study it for both electrons and holes provides an unambiguous demonstration of this strongly interacting quantum ground state.

U2 - 10.1038/nphys2692

DO - 10.1038/nphys2692

M3 - Journal article

VL - 9

SP - 576

EP - 581

JO - Nature Physics

JF - Nature Physics

SN - 1745-2473

ER -

ID: 91302444