Publications by authors named "Qing-Ping Ding"
Article Synopsis
- P nuclear magnetic resonance (NMR) studies reveal key insights into the magnetic properties and spin dynamics of Fe spins in NaFe(PO), a two-dimensional triangular lattice compound.
- A significant peak in the nuclear spin-lattice relaxation rate (1/T1) at the Néel temperature (TN=10.9K) indicates an antiferromagnetic transition, with an estimated exchange coupling of J/kB≃1.9K.
- The findings suggest that NaFe(PO) exhibits a conventional three-dimensional antiferromagnetic state characterized by specific NMR spectral shapes and strong temperature-dependent spin wave behaviors, with no evidence of spin frustration.
SrMnP and CaMnP are insulators that adopt the trigonal CaAlSi-type structure containing corrugated Mn honeycomb layers. Magnetic susceptibility and heat capacity versus temperature data reveal a weak first-order antiferromagnetic (AFM) transition at the Néel temperature [Formula: see text] K for SrMnP and a strong first-order AFM transition at [Formula: see text] K for CaMnP Both compounds exhibit isotropic and nearly -independent [Formula: see text], suggesting magnetic structures in which nearest-neighbor moments are aligned at [Formula: see text] to each other. The P NMR measurements confirm the strong first-order transition in CaMnP but show critical slowing down above [Formula: see text] for SrMnP, thus also evidencing second-order character.
View Article and Find Full Text PDFSpin-triplet superconductors potentially host topological excitations that are of interest for quantum information processing. We report the discovery of spin-triplet superconductivity in UTe, featuring a transition temperature of 1.6 kelvin and a very large and anisotropic upper critical field exceeding 40 teslas.
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