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Article
Open AccessGiant phonon anomalies in the proximate Kitaev quantum spin liquid α-RuCl3
The Kitaev quantum spin liquid epitomizes an entangled topological state, for which two flavors of fractionalized low-energy excitations are predicted: the itinerant Majorana fermion and the Z2 gauge flux. It was...
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Article
Open AccessA continuous metal-insulator transition driven by spin correlations
While Mott insulators induced by Coulomb interactions are a well-recognized class of metal-insulator transitions, insulators purely driven by spin correlations are much less common, as the reduced energy scale...
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Article
Open AccessVan Hove singularity in the magnon spectrum of the antiferromagnetic quantum honeycomb lattice
In quantum magnets, magnetic moments fluctuate heavily and are strongly entangled with each other, a fundamental distinction from classical magnetism. Here, with inelastic neutron scattering measurements, we p...
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Article
Open AccessAntisymmetric linear magnetoresistance and the planar Hall effect
The phenomena of antisymmetric magnetoresistance and the planar Hall effect are deeply entwined with ferromagnetism. The intrinsic magnetization of the ordered state permits these unusual and rarely observed m...
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Article
Open AccessPublisher Correction: Strongly-coupled quantum critical point in an all-in-all-out antiferromagnet
The original PDF version of the Article contained an error in the last sentence of the author affiliation information, which incorrectly read ‘Correspondence and requests for materials should be addressed to T...
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Article
Open AccessStrongly-coupled quantum critical point in an all-in-all-out antiferromagnet
Dimensionality and symmetry play deterministic roles in the laws of Nature. They are important tools to characterize and understand quantum phase transitions, especially in the limit of strong correlations bet...
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Article
Open AccessSpin-orbit-driven magnetic structure and excitation in the 5d pyrochlore Cd2Os2O7
Much consideration has been given to the role of spin-orbit coupling (SOC) in 5d oxides, particularly on the formation of novel electronic states and manifested metal-insulator transitions (MITs). SOC plays a dom...
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Article
Evolution of spin excitations into the superconducting state in FeTe1−xSex
A neutron scattering study shows that the spin excitations in both pnictide- and copper-oxide-based superconductors have the same four-fold symmetry. If these excitations do indeed mediate the superconductivit...
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Article
Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields
The synthesis of the novel superconductor LaFeAsO0.89F0.11 with transition temperature Tc ∼ 26 K has been quickly followed by reports of even higher Tcs. These discoveries have generated much interest in the mech...
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Article
Crystal Growth, Structure, and Stoichiometry of the Superconducting Pyrochlore Cd2Re2O7
We report single-crystal growth of the superconducting pyrochlore Cd2Re2O7 using a vapor transport technique. Several parameters of the growth conditions, including hot-zone temperature and starting stoichiometry...
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Article
Pressure Effects on Superconducting and Magnetic Transitions in Layered Sodium Cobalt Oxides, NaxCoO2
The results of dc magnetization measurements under hydrostatic (helium-gas) pressure are presented for an ambient pressure superconductor Na0.35CoO21.4D2O and its precursor compound Na0.75CoO2 known to combine me...
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Article
Pressure effects on superconducting and magnetic transitions in layered sodium cobalt oxides, NaxCoO2
The results of dc magnetization measurements under hydrostatic (heliumgas) pressure are presented for an ambient pressure superconductor Na0.35CoO21.4D2O and its precursor compound Na0.75CoO2 known to combine met...
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Article
Evidence of a Order-Disorder Transition in the Crystalline Phase of Cd6Yb, 1/1 cubic approximant of icosahedral Cd5.7 Yb
The electrical and thermal transport properties (electrical resistivity, thermopower, heat capacity and thermal conductivity) of the crystalline phase of the binary Cd6Yb system has been measured over a temperatu...
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Article
When Does a Crystal Conduct Heat Like a Glass?
Semiconducting crystalline materials that are poor conductors of heat are important as thermoelectric materials and for technological applications involving thermal management. In the present article neutron s...
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Article
Slater Transition in the Pyrochlore Cd2Os2O7
Cd2Os2O7 crystallizes in the pyrochlore structure and undergoes a metal-insulator transition (MIT) near 226 K. Here we present resistivity, heat capacity, and magnetization results on Cd2Os2O7. Both single crysta...
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Article
Connections between Crystallographic Data and New Thermoelectric Compounds
New bulk thermoelectric compounds are normally discovered with the aid of simple qualitative structure-property relationships. Most good thermoelectric materials are narrow gap semiconductors composed of heavy...
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Article
Atomic Displacement Parameters: A Useful Tool in the Search for New Thermoelectric Materials?
The atomic displacement parameters (ADPs) measure the mean-square displacement amplitude of an atom about its equilibrium position in a crystal. It is demonstrated that the ADPs can be used to identify crystal...
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Article
A Neutron Diffraction Study of Co2Ru1−xMnxO4 Spinels
Powder neutron diffraction and magnetization measurements are presented on the Co2Ru1-xMnxO4 system. In these materials the tetrahedral (A) sites are occupied by Co2+ (S = 3/2) ions, and the octahedral (B) sites ...
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Article
Localized vibrational modes in metallic solids
Filled skutterudite antimonides1,2 are cubic compounds with the formula RM4Sb12, where R is a rare-earth element (such as La or Ce), and M is a transition metal (for example, Fe or Co). The rare-earth ion is weak...
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Article
Chemical and Sonochemical Approaches to the Formation of VO2 Films and VO2-Impregnated Materials
A new chemical and chemical/ultrasonic approach to the preparation of VO2 films and VO2-impregnated bulk materials has been developed. In this approach, a V2O5 sol prepared by quenching is used to coat SiO2 subst...
