Unconventional fractional quantum Hall states and Wigner crystallization in suspended Corbino graphene

Manohar Kumar, Antti Laitinen, Pertti Hakonen*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

11 Sitaatiot (Scopus)
314 Lataukset (Pure)

Abstrakti

Competition between liquid and solid states in two-dimensional electron systems is an intriguing problem in condensed matter physics. We have investigated competing Wigner crystal and fractional quantum Hall (FQH) liquid phases in atomically thin suspended graphene devices in Corbino geometry. Lowerature magnetoconductance and transconductance measurements along with IV characteristics all indicate strong charge density dependent modulation of electron transport. Our results show unconventional FQH phases which do not fit the standard Jain's series for conventional FQH states, instead they appear to originate from residual interactions of composite fermions in partially filled Landau levels. Also at very low charge density with filling factors ν ≲, 1/5ν 1 -5, electrons crystallize into an ordered Wigner solid which eventually transforms into an incompressible Hall liquid at filling factors around ν ≤ 1/7. Building on the unique Corbino sample structure, our experiments pave the way for enhanced understanding of the ordered phases of interacting electrons.

AlkuperäiskieliEnglanti
Artikkeli2776
Sivut1-8
JulkaisuNature Communications
Vuosikerta9
Numero1
DOI - pysyväislinkit
TilaJulkaistu - 1 joulukuuta 2018
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    QuDeT: Quantum devices in topological matter: carbon nanotubes, graphene, and novel superfluids

    Thanniyil Sebastian, A., Kaikkonen, J., Kamada, M., Manninen, J., Tan, Z., Will, M., Todoshchenko, I., Hakonen, P., Zavyalov, V., Sergeicheva, E., Song, X., Tong, F., Kumar, M., Hüttel, A., Korhonen, K. & Haque, M.

    05/11/201531/08/2021

    Projekti: EU: ERC grants

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