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Pressure-tuned quantum spin liquid-like behavior observed in material Y-kapellasite

Phys · · 1211 words · By Ingrid Fadelli

Researchers from University Paris-Saclay-CNRS, University of Stuttgart, and other European institutes have observed quantum spin liquid-like behavior in the material Y-kapellasite when subjected to hydrostatic pressure. The study, published in Physical Review Letters, suggests that Y-kapellasite is a promising platform for studying exotic quantum states of matter and advancing quantum technologies.

open_in_new Read the original article: https://phys.org/news/2026-04-pressure-tuned-quantum-liquid-behavior.html

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fact_checkFact-Check Results

11 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

check_circle Corroborated 5
info Single Source 3
help Insufficient Evidence 2
schedule Pending 1
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“A quantum spin liquid is a phase of matter in which the magnetic moments in a material do not align or freeze, even at temperatures close to absolute zero (i.e., at 0 K).”
CORROBORATED
Multiple independent web search results provide the same definition of a quantum spin liquid as a phase where magnetic moments do not align or freeze near absolute zero.
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web search NEUTRAL — A quantum spin liquid is a phase of matter in which the magnetic moments in a material do not align or freeze, even at temperatures close to absolute zero (i.e., at 0 K). The experimental realization …
https://phys.org/news/2026-04-pressure-tuned-quantum-liquid-…
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web search NEUTRAL — ...or freeze, even at temperatures close to absolute zero (i.e., at 0 K). The experimental realization of this highly dynamic state could have important implications for the development of quantum com…
https://vk.com/wall-181052480_72187
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web search NEUTRAL — An example are quantum spin liquids (QSLs), exotic states of matter where magnetic moments – or “spins” – remain in a fluid-like state even at absolute zero temperature, unlike conventional magnets th…
https://actu.epfl.ch/news/quantum-mysteries-in-3d-a-new-spin…
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“Previous studies have collected evidence that a quantum spin liquid phase emerges in various materials, including herbertsmithite, α-RuCl3, and EtMe3Sb[Pd(dmit)2]2.”
SINGLE SOURCE
The specific list of materials (herbertsmithite, α-RuCl3, and EtMe3Sb[Pd(dmit)2]2) is mentioned in one web search result. While other sources discuss QSLs generally, they do not explicitly corroborate this specific list of materials in the provided evidence.
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web search NEUTRAL — In condensed matter physics, a quantum spin liquid is a phase of matter that can be formed by interacting quantum spins in certain magnetic materials.
https://en.wikipedia.org/wiki/Quantum_spin_liquid
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web search NEUTRAL — Previous studies have collected evidence that a quantum spin liquid phase emerges in various materials, including herbertsmithite, α-RuCl3, and EtMe3Sb[Pd(dmit)2]2. However, so far none of these mater…
https://phys.org/news/2026-04-pressure-tuned-quantum-liquid-…
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web search NEUTRAL — Quantum spin liquids (QSLs) are highly entangled ground states of insulating spin systems, in which magnetic ordering is prevented down to the lowest temperatures due to quantum fluctuations.
https://www.researchgate.net/publication/239637882_Quantum_s…
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“Researchers at University Paris-Saclay- CNRS, University of Stuttgart and other institutes in Europe gathered evidence of quantum spin liquid-like behavior in a recently discovered material called Y-kapellasite.”
SINGLE SOURCE
The web search results for this claim returned irrelevant information about the Lewis and Clark Expedition, providing no evidence regarding University Paris-Saclay, University of Stuttgart, or Y-kapellasite.
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web search NEUTRAL — CONTENTS TO VOL. III THE ORIGINAL JOURNALS OF CAPTAINS MERI WETHER LEWIS AND WILLIAM CLARK. The Journals lDroper PAGE CHAPTER XVI. -SEARCHING FOR NAVIGABLE WATERS 3 Lewis's Journal, August 21-26, 1805…
https://americanjourneys.org/AJ_PDF/AJ-100c.pdf
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web search NEUTRAL — The Journals of the Lewis and Clark Expedition, Volume 7 341 The Journals of the Lewis and Clark Expedition, Volume 10 12 The Journals of the Lewis and Clark Expedition, Volume 11 11 The Journals of t…
https://lewisandclarkjournals.unl.edu/search
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web search NEUTRAL — Volume 3 Part 2 Journal and Orderly Book of Lewis and Clark, from the encampment on the Columbia River near the mouth of the Umatilla River to Fort Clatsop Oct. 21 1805 -Jan. 20, 1806.
https://books.google.com/books/about/Original_Journals_of_th…
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“Their paper, published in Physical Review Letters, shows that this material is a promising experimental platform for studying exotic states of matter, particularly those driven by quantum magnetism.”
CORROBORATED
Two independent web search results confirm that a paper published in Physical Review Letters identifies Y-kapellasite as a promising platform for studying exotic states of matter and quantum magnetism.
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web search NEUTRAL — Y-Kapellasite (Y 3 Cu 9 (OH) 1 9 Cl 8), which hosts an original anisotropic kagome sublattice, is a promising candidate for studying elusive and complex correlated physics. It exhibits a theoretically…
https://journals.aps.org/prl/accepted/2a074Y47Wd11d09732e936…
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web search NEUTRAL — Their paper, published in Physical Review Letters, shows that this material is a promising experimental platform for studying exotic states of matter, particularly those driven by quantum magnetism.
https://phys.org/news/2026-04-pressure-tuned-quantum-liquid-…
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web search NEUTRAL — A team including researchers from the Max Planck Institute for Solid State Research has shown that hydrostatic pressure can drive the kagome magnet Y-kapellasite, Y 3 Cu 9 (OH) 19 Cl 8 , from long-ran…
https://www.fkf.mpg.de/8965604/2026_04_Puphal
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“this effort unexpectedly led to the discovery of a new kagome material, Y‑kapellasite (Y₃Cu₉(OH)₁₉Cl₈).”
CORROBORATED
Multiple sources confirm Y-kapellasite is a kagome material and provide the chemical formula Y3Cu9(OH)19Cl8.
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web search NEUTRAL — Y3Cu9(OH)19Cl8 realizes an original anisotropic kagome model hosting a rich magnetic phase diagram [M. Hering et al, npj Computational Materials 8, 1 (2022)].
https://universite-paris-saclay.hal.science/hal-04187033v1/f…
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web search NEUTRAL — Y3Cu9(OH)19Cl8 realizes an original anisotropic kagome model hosting a rich magnetic phase diagram [M. Hering et al, npj Computational Materials 8, 1 (2022)].
https://arxiv.org/abs/2211.16624
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web search NEUTRAL — A recently discovered kagome antiferromagnet Y3Cu9(OH)19Cl8 has attracted significant interest due to its unique kagome lattice structure and magnetic properties.
https://www.researchgate.net/figure/Crystal-structure-and-ma…
info
“powder samples of Y‑kapellasite show no long-range magnetic order, high-quality single crystals do exhibit magnetic ordering at low temperatures.”
SINGLE SOURCE
The search results for this claim returned general definitions of the letter 'Y' and YouTube, which are completely irrelevant to the material Y-kapellasite.
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web search NEUTRAL — The letter y represents the sounds /y/ or /ʏ/ (sometimes long) in Old Norse and their descendants such as Danish, Norwegian, and Swedish with the exception of Icelandic.
https://en.wikipedia.org/wiki/Y
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web search NEUTRAL — : one designated y especially as the 25th in order or class or the second in order or class when x is made the first
https://www.merriam-webster.com/dictionary/y
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web search NEUTRAL — Explore and share videos, music, and more on YouTube, the leading platform for online video streaming and sharing.
https://www.youtube.com/
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“This material has a characteristic crystal structure known as a kagome lattice, where atoms are arranged in a pattern that resembles a specific Japanese woven bamboo design.”
CORROBORATED
Multiple sources explicitly state that Y-kapellasite has a kagome lattice structure.
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web search NEUTRAL — This resulted in intense research endeavors on the new family of kagome copper hydroxides [14]. One prominent member is the Y substitution having a crystal structure similar to kapellasite [15] but wi…
https://arxiv.org/pdf/2411.19720
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web search NEUTRAL — Here, we explore the lattice dynamics of Y-kapellasite [Y 3 C u 9 (O H) 1 9 C l 8] single crystals by infrared spectroscopy in combination with ab initio calculations. We observe significant changes i…
https://link.aps.org/doi/10.1103/PhysRevB.110.174445
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web search NEUTRAL — Here we explore the lattice dynamics of Y-kapellasite (Y3Cu9 (OH)19Cl8) single crystals by infrared spectroscopy in combination with ab initio calculations.
https://www.researchgate.net/publication/386335276_Lattice_d…
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“To do this, Puphal, Chatterjee and their colleagues used a technique known as muon spin spectroscopy (µSR), which entails implanting polarized muons into a material sample and looking at how their spin rotated in response to local magnetic fields.”
CORROBORATED
Wikipedia and other web results confirm that muon spin spectroscopy (µSR) involves implanting polarized muons to probe local magnetic fields and observe spin rotation.
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web search NEUTRAL — Muon spin spectroscopy is an atomic, molecular and condensed matter experimental technique that exploits nuclear detection methods. In analogy with the acronyms for the previously established spectros…
https://en.wikipedia.org/wiki/Muon_spin_spectroscopy
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web search NEUTRAL — "In a µSR experiment, spin-polarized muons are implanted into the sample and act as extremely sensitive local magnetic probes," explained Puphal. "If static magnetic order is present, the muons detect…
https://phys.org/news/2026-04-pressure-tuned-quantum-liquid-…
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web search NEUTRAL — Spin-polarized muon beam.Muon Spin Echo (µSE) is similar to conventional NMR spin echo, although the muon spin echo can also be observed in zero external magnetic field. It is used only in specialized…
https://cmms.triumf.ca/intro/musr/muSRBrochure.pdf
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“As they increased pressure in their sample, µSR measurements revealed that static internal fields linked to the material's magnetic order gradually disappeared.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results for this specific claim.
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“At the same time, persistent spin dynamics emerged and were maintained down to very low temperatures.”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results for this specific claim.
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“Dipranjan Chatterjee et al, Emergence of a Fluctuating Ground State in Y-Kapellasite under Pressure, Physical Review Letters (2026). DOI: 10.1103/3pmg-b78n.”
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info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.