Impurity-induced resonant spinon zero modes in Dirac quantum spin liquids

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

78 Lataukset (Pure)

Abstrakti

Quantum spin liquids are strongly correlated phases of matter displaying a highly entangled ground state. Because of their unconventional nature, finding experimental signatures of these states has proven to be a remarkable challenge. Here we show that the effects of local impurities can provide strong signatures of a Dirac quantum spin-liquid state. Focusing on a gapless Dirac quantum spin-liquid state as realized in NaYbO2, we show that a single magnetic impurity coupled to the quantum spin-liquid state creates a resonant spinon peak at zero frequency, coexisting with the original Dirac spinons. We explore the spatial dependence of this zero-bias resonance and show how different zero modes stemming from several impurities interfere. We finally address how such spinon zero-mode resonances can be experimentally probed with inelastic spectroscopy and electrically driven paramagnetic resonance with scanning tunnel microscopy. Our results put forward impurity engineering as a means of identifying Dirac quantum spin liquids with scanning probe techniques, highlighting the dramatic impact of magnetic impurities in a macroscopically entangled many-body ground state.
AlkuperäiskieliEnglanti
Artikkeli033466
Sivut1-9
Sivumäärä9
JulkaisuPHYSICAL REVIEW RESEARCH
Vuosikerta2
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 22 syysk. 2020
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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  • -: Lado Jose AT-palkka

    Lado, J.

    01/09/202031/08/2025

    Projekti: Academy of Finland: Other research funding

  • -: Lado Jose AT-kulut

    Lado, J., Hyart, T., Kumar, P. & Koch, R.

    01/09/202031/08/2023

    Projekti: Academy of Finland: Other research funding

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