Atomic-scale STM identifies both C-type (d-wave altermagnetic) and G-type (antiferromagnetic) magnetic configurations in KV2Se2O, both generating similar spin-split electronic structures.
Observation of hidden altermagnetism in Cs$_{1-\delta}$V$_2$Te$_2$O
9 Pith papers cite this work. Polarity classification is still indexing.
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Pith papers citing it
abstract
Altermagnets are characterized by anisotropic band/spin splittings in momentum space, dictated by their spin-space group symmetries. However, the real-space modulations of altermagnetism are often neglected and have not been explored experimentally. Here we combine neutron diffraction, angle-resolved photoemission spectroscopy (ARPES), spin-resolved ARPES and density functional theory to demonstrate that Cs$_{1-\delta}$V$_2$Te$_2$O realizes a spatially modulated form of altermagnetism, i.e., hidden altermagnetism. Such a state in Cs$_{1-\delta}$V$_2$Te$_2$O results from its G-type antiferromagnetism and two-dimensional electronic states, allowing for the development of spatially alternating altermagnetic layers, whose local spin polarizations are directly verified by spin-resolved ARPES measurements. Our experimental discovery of hidden altermagnetism broadens the scope of unconventional magnetism and opens routes to exploring emergent phenomena from real-space modulations of altermagnetic order.
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In d-wave altermagnets the leading intrinsic anomalous thermal Hall effect appears at third order in temperature gradient and is governed by a nonlinear thermal Berry-connection polarizability that encodes the quantum metric.
Neutron powder diffraction shows Rb1-xV2Te2O orders in a G-type antiferromagnetic structure below 337 K, contrary to prior theoretical predictions for its altermagnetic properties.
Altermagnets intrinsically generate hundreds of high harmonics in spin and charge pumping under magnetic dynamics, with amplitudes exceeding light-driven schemes and without needing extra spin-orbit coupling.
Theoretical analysis of AV2X2O oxychalcogenides predicts dominant equal-spin triplet superconductivity arising from altermagnetic order that forbids conventional singlet pairing.
CsCr3Sb5's 4x1 CDW state features antiferromagnetic Cr dimers whose fluctuations may mediate superconductivity.
Pressure suppresses the density-wave feature in the d-wave altermagnet candidate CsV2Se2O and induces a reproducible, field-suppressible resistive downturn below 3 K suggestive of superconductivity.
A theoretical proposal for hybrid magnets via heterojunctions of zero-net-magnetization monolayers that enable selective doping-induced net magnetization, verified with tight-binding models and DFT on Cr2C2S6/CrMoC2S6.
Prediction of robust d-wave altermagnetism in RbCr2Se2O and the XCr2Y2O family with strain-induced net magnetization.
citing papers explorer
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Real-space identification of distinct magnetic configurations in a candidate d-wave altermagnet
Atomic-scale STM identifies both C-type (d-wave altermagnetic) and G-type (antiferromagnetic) magnetic configurations in KV2Se2O, both generating similar spin-split electronic structures.
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Intrinsic anomalous thermal hall effect as a signature of quantum metric in d-wave altermagnets
In d-wave altermagnets the leading intrinsic anomalous thermal Hall effect appears at third order in temperature gradient and is governed by a nonlinear thermal Berry-connection polarizability that encodes the quantum metric.
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G-type antiferromagnetic structure in Rb1-xV2Te2O
Neutron powder diffraction shows Rb1-xV2Te2O orders in a G-type antiferromagnetic structure below 337 K, contrary to prior theoretical predictions for its altermagnetic properties.
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High-Harmonic Spin and Charge Pumping in Altermagnets
Altermagnets intrinsically generate hundreds of high harmonics in spin and charge pumping under magnetic dynamics, with amplitudes exceeding light-driven schemes and without needing extra spin-orbit coupling.
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Unconventional superconductivity in $A$V$_2X_2$O family of surface altermagnets
Theoretical analysis of AV2X2O oxychalcogenides predicts dominant equal-spin triplet superconductivity arising from altermagnetic order that forbids conventional singlet pairing.
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Antiferromagnetic Dimers in the Parent Phase of a Correlated Kagome Superconductor
CsCr3Sb5's 4x1 CDW state features antiferromagnetic Cr dimers whose fluctuations may mediate superconductivity.
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Pressure-Induced Superconducting-like Transition in the $\it d$-wave Altermagnet Candidate CsV$_2$Se$_2$O
Pressure suppresses the density-wave feature in the d-wave altermagnet candidate CsV2Se2O and induces a reproducible, field-suppressible resistive downturn below 3 K suggestive of superconductivity.
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Zero-net-magnetization hybrid magnet
A theoretical proposal for hybrid magnets via heterojunctions of zero-net-magnetization monolayers that enable selective doping-induced net magnetization, verified with tight-binding models and DFT on Cr2C2S6/CrMoC2S6.
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Robust $d$-wave altermagnetism in $\mathrm{XCr_2Y_2O}$ (X=K, Rb, Cs; Y=S, Se, Te) family
Prediction of robust d-wave altermagnetism in RbCr2Se2O and the XCr2Y2O family with strain-induced net magnetization.