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

dc.contributorAalto Universityen
dc.contributor.authorChen, Guangze
dc.contributor.authorLado, Jose
dc.contributor.departmentCorrelated Quantum Materials (CQM)
dc.contributor.departmentDepartment of Applied Physicsen
dc.description.abstractQuantum 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.en
dc.description.versionPeer revieweden
dc.identifier.citationChen , G & Lado , J 2020 , ' Impurity-induced resonant spinon zero modes in Dirac quantum spin liquids ' , PHYSICAL REVIEW RESEARCH , vol. 2 , no. 3 , 033466 , pp. 1-9 .
dc.identifier.otherPURE UUID: 52fccfd5-a2b2-4a86-b305-01c50a055c70
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dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPHYSICAL REVIEW RESEARCHen
dc.relation.ispartofseriesVolume 2, issue 3en
dc.titleImpurity-induced resonant spinon zero modes in Dirac quantum spin liquidsen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi