Signatures of Wigner localization in epitaxially grown nanowires

Liney Halla Kristinsdottir, Jonas Cremon, Henrik Nilsson, Hongqi Xu, Lars Samuelson, Heiner Linke, Andreas Wacker, Stephanie Reimann

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It was predicted by Wigner in 1934 that an electron gas will undergo a transition to a crystallized state when its density is very low. Whereas significant progress has been made toward the detection of electronic Wigner states, their clear and direct experimental verification still remains a challenge. Here we address signatures of Wigner molecule formation in the transport properties of InSb nanowire quantum-dot systems, where a few electrons may form localized states depending on the size of the dot (i.e., the electron density). Using a configuration interaction approach combined with an appropriate transport formalism, we are able to predict the transport properties of these systems, in excellent agreement with experimental data. We identify specific signatures of Wigner state formation, such as the strong suppression of the antiferromagnetic coupling, and are able to detect the onset of Wigner localization, both experimentally and theoretically, by studying different dot sizes.
Original languageEnglish
Article number041101
JournalPhysical Review B (Condensed Matter and Materials Physics)
Issue number4
Publication statusPublished - 2011

Subject classification (UKÄ)

  • Condensed Matter Physics


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