Projects per year
Abstract
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.
Original language | English |
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Article number | 033466 |
Pages (from-to) | 1-9 |
Number of pages | 9 |
Journal | PHYSICAL REVIEW RESEARCH |
Volume | 2 |
Issue number | 3 |
DOIs | |
Publication status | Published - 22 Sep 2020 |
MoE publication type | A1 Journal article-refereed |
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Projects
- 2 Active
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Engineering fractional quantum matter in twisted van der Waals materials
01/09/2020 → 31/08/2025
Project: Academy of Finland: Other research funding
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Engineering fractional quantum matter in twisted van der Waals materials
Lado, J., Koch, R. & Kumar, P.
01/09/2020 → 31/08/2023
Project: Academy of Finland: Other research funding