NiPSe3 is regarded as a bandwidth-controlled Mott insulator, distinct from the widely studied Mott insulating magnetic graphene MPSe3 (M = Mn and Fe) family. By employing high-pressure synchrotron ...X-ray diffraction, we observe two structural transitions as a function of pressure. With the help of first-principles calculations, we discover the antiferromagnetic (AFM) moment directions of NiPSe3 switch from out-of-plane to in-plane and the honeycomb layers slide relative to each other at the first structural transition. The in-plane AFM order persists until the second structural transition, whereupon the two-dimensional (2D) structure assumes a more three-dimensional (3D) character. A bandwidth-controlled Mott insulator-metal transition (IMT) occurs between the two structural transitions at 8.0 GPa, concomitant with the emergence of superconductivity with 4.8 K. The superconductivity in NiPSe3 emerging in the 2D monoclinic phase coexists with the in-plane AFM order and continues into the 3D trigonal phase. Our electronic structure calculations reveal that the Mott IMT and superconductivity in NiPSe3 are both closely related to the enhanced Se2- 4p and Ni2+ 3d electronic hybridizations under pressure. From these results, we construct the temperature-pressure electronic phase diagram of NiPSe3, revealing rich physics and many similarities with copper oxide and iron-based superconductors.
A novel one-dimensional copper (II) chlorophosphate, Na{sub 3}CuO(HPO{sub 4})Cl has been prepared by using the low-temperature flux method. It crystallizes in the orthorhombic system, space group ...Pnma, a=11.096(2), b=6.5703(13) and c=8.3623(17)A, V=609.7(2)A{sup 3}, Z=4. Its crystal structure presents a one-dimensional character in such a way that the edge-sharing CuO{sub 4}Cl{sub 2} building blocks yield a novel linear octahedral chains via Cu-O-Cu and Cu-Cl-Cu bridges. The HPO{sub 4} groups, as the modifier, are grafted onto these chains and sodium ions are located between the chains to satisfy the charge balance. The magnetic susceptibility obeys a Curie-Weiss law above 120K with C=0.38 (emuK)/mol and {theta}=-150K, showing the Cu{sup 2+} character and antiferromagnetic interactions.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The crystal structure of a new potassium/hydronium tungstophosphate, potassium hydronium phosphate tungstate, K2.4(H3O)0.6PO4W12O36, obtained by hydrothermal synthesis at low pH, has been ...determined by single‐crystal X‐ray diffraction. Regular PO4 tetrahedra are located on sites of 3m symmetry. 12 W atoms are in a shell around the phosphate anion and are surrounded by O atoms in a distorted octahedral coordination. The close packing of the heteropolyanionic units forms orthogonally intersecting channels where the statistically distributed potassium/hydronium ions are situated.
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BFBNIB, FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SBCE, SBMB, UL, UM, UPUK
A cocktail of six lytic bacteriophages, SalmoFresh™, significantly (p < 0.05) reduced the number of surface-applied Salmonella Kentucky and Brandenburg from stainless steel and glass surfaces by > ...99% (2.1-4.3 log). Both strains were susceptible to SalmoFresh™ in the spot-test assay. Conversely, SalmoFresh™ was unable to reduce surface contamination with a Salmonella Paratyphi B strain that was not susceptible to the phage cocktail in the spot-test assay. However, by replacing two SalmoFresh™ component phages with two new phages capable of lysing the Paratyphi B strain in the spot-test assay, the target range of the cocktail was shifted to include the Salmonella Paratyphi B strain. The modified cocktail, SalmoLyse™, was able to significantly (p < 0.05) reduce surface contamination of the Paratyphi B strain by > 99% (2.1-4.1 log). The data show that both phage cocktails were effective in significantly reducing the levels of Salmonella on hard surfaces, provided the contaminating strains were susceptible in the spot-test (i.e., spot-test susceptibility was indicative of efficacy in subsequent surface decontamination studies). The data also support the concept that phage preparations can be customized to meet the desired antibacterial application.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
Key message
Nitrogen availability and cytokinin could promote shoot branching in rice, whereas auxin and strigolactone inhibited it. The interaction between nitrogen availability and the three ...hormones is discussed.
Rice shoot branching is strongly affected by nitrogen availability and the plant hormones auxin, cytokinin, and strigolactone; however, the interaction of them in the regulation of rice shoot branching remains a subject of debate. In the present study, nitrogen and the three hormones were used to regulate rice tiller bud growth in the
indica
rice variety Yangdao 6. Both nitrogen and CK promoted shoot branching in rice, whereas auxin and SL inhibited it. We used HPLC to determine the amounts of endogenous IAA and CK, and we used quantitative real-time PCR analysis to quantify the expression levels of several genes. Nitrogen enhanced the amount of CK by promoting the expression levels of
OsIPTs
in nodes. In addition, both nitrogen and CK downregulated the expression of genes related to SL synthesis in root and nodes, implying that the inhibition of SL synthesis by nitrogen may occur at least partially through the CK pathway. SL did not significantly reduce the amount of CK or the expression levels of
OsIPT
genes, but it did significantly reduce the amount of auxin and the auxin transport capacity in nodes. Auxin itself inhibited CK synthesis and promoted SL synthesis in nodes rather than in roots. Furthermore, we found that CK and SL quickly reduced and increased the expression of
FC1
in buds, respectively, implying that
FC1
might be a common target for the CK and SL pathways. Nitrogen and auxin delayed expression change patterns of
FC1
, potentially by changing the downstream signals for CK and SL.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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