Moiré modulated quantum spin liquid candidate 1T-TaSe$_2$
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
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2025
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| _version_ | 1866909887580078080 |
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| author | Wang, Ziying Fumega, Adolfo O. Montoto, Ana Vera Amini, Mohammad Arslan, Büşra Gamze Cahlík, Aleš Ding, Yuxiao Lado, Jose L. Drost, Robert Liljeroth, Peter |
| author_facet | Wang, Ziying Fumega, Adolfo O. Montoto, Ana Vera Amini, Mohammad Arslan, Büşra Gamze Cahlík, Aleš Ding, Yuxiao Lado, Jose L. Drost, Robert Liljeroth, Peter |
| contents | Quantum spin liquids are quantum phases of matter featuring collectively entangled states and emergent fractional many-body excitations. While methods exist to probe three-dimensional quantum spin liquids experimentally, these techniques lack the sensitivity to probe two-dimensional quantum spin liquids. This seriously hampers the study of potential monolayer quantum spin liquid candidates such as $α$-RuCl$_3$ and 1T-TaSe$_2$. Scanning tunneling microscopy (STM) and spectroscopy (STS) have recently been suggested as promising probes of the quantum spin liquid state, as they can access the spinon spectrum through inelastic tunneling spectroscopy (IETS). In this work, we employ this approach on the quantum spin liquid candidate material 1T-TaSe$_2$ and directly measure its low-energy inelastic excitations. We observe the emergence of a $\sqrt{3}\times\sqrt{3}$ reconstruction driven by the substrate, equivalent spectroscopy across all spin sites and coexistence of zero and finite energy excitations. We show that these observations are consistent with a modulated $\sqrt{3}\times\sqrt{3}$ spin liquid ground state. Our results demonstrate that IETS provides a powerful route to obtain atomic-scale insight into the magnetic excitations of two-dimensional materials, allowing to explore the effects of moiré modulations on potential quantum liquid phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_03311 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Moiré modulated quantum spin liquid candidate 1T-TaSe$_2$ Wang, Ziying Fumega, Adolfo O. Montoto, Ana Vera Amini, Mohammad Arslan, Büşra Gamze Cahlík, Aleš Ding, Yuxiao Lado, Jose L. Drost, Robert Liljeroth, Peter Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Quantum spin liquids are quantum phases of matter featuring collectively entangled states and emergent fractional many-body excitations. While methods exist to probe three-dimensional quantum spin liquids experimentally, these techniques lack the sensitivity to probe two-dimensional quantum spin liquids. This seriously hampers the study of potential monolayer quantum spin liquid candidates such as $α$-RuCl$_3$ and 1T-TaSe$_2$. Scanning tunneling microscopy (STM) and spectroscopy (STS) have recently been suggested as promising probes of the quantum spin liquid state, as they can access the spinon spectrum through inelastic tunneling spectroscopy (IETS). In this work, we employ this approach on the quantum spin liquid candidate material 1T-TaSe$_2$ and directly measure its low-energy inelastic excitations. We observe the emergence of a $\sqrt{3}\times\sqrt{3}$ reconstruction driven by the substrate, equivalent spectroscopy across all spin sites and coexistence of zero and finite energy excitations. We show that these observations are consistent with a modulated $\sqrt{3}\times\sqrt{3}$ spin liquid ground state. Our results demonstrate that IETS provides a powerful route to obtain atomic-scale insight into the magnetic excitations of two-dimensional materials, allowing to explore the effects of moiré modulations on potential quantum liquid phases. |
| title | Moiré modulated quantum spin liquid candidate 1T-TaSe$_2$ |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2511.03311 |