76 research outputs found
Electronic orders near the type-II van Hove singularity in BC
Using the functional renormalization group, we investigate the electron
instability in the single-sheet BC when the electron filling is near a
type-II van Hove singularity. For a finite Hubbard interaction, the
ferromagnetic-like spin density wave order dominates in the immediate vicinity
of the singularity. Elsewhere near the singularity the p-wave superconductivity
prevails. We also find that a small nearest-neighbor Coulomb repulsion can
enhance the superconductivity. Our results show that BC would be a
promising candidate to realize topological superconductivity, but the
transition temperature is practically sizable only if the local interaction is
moderately strong.Comment: 6 pages, 6 color figures. arXiv admin note: text overlap with
arXiv:1503.0047
Die hintere und distale Referenzierung führt zu unnatürlichen Abweichungen im Femoropatellargelenk
Evolutionary crossroads in developmental biology: hemichordates
International audienceHemichordates are a deuterostome phylum, the sister group to echinoderms, and closely related to chordates. They have thus been used to gain insights into the origins of deuterostome and chordate body plans. Developmental studies of this group have a long and distinguished history. Recent improvements in animal husbandry, functional tool development and genomic resources have resulted in novel developmental data from several species in this group. In this Primer, we introduce representative hemichordate species with contrasting modes of development and summarize recent findings that are beginning to yield important insights into deuterostome developmental mechanisms
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