Band dispersions and Fermi surfaces of the three-dimensional Mott-Hubbard system SrVO3 are directly observed by angle-resolved photoemission spectroscopy. An observed spectral weight distribution near the Fermi level (E(F)) shows cylindrical Fermi surfaces as predicted by band-structure calculations. By comparing the experimental results with calculated surface electronic structures, we conclud...

Fermi-surface-free superconductivity arises when the superconducting order pulls down spectral weight from a band that is completely above the Fermi energy in the normal state. We show that this can arise in hole-doped cuprates when a competing order causes a reconstruction of the Fermi surface. The change in Fermi surface topology is accompanied by a characteristic rise in the spectral weight....

l cd in binding (concanavalin A, biotinv lated ricinus communis agglutinin, and biotinylated siiccinylated wheat germ agglutinin (B-SWGA)) was used to detect the glycosylated proteins associated with a residual protein fraction [insoluble in 4% sodium dodecyl sulfate and termed the nuclear residual fraction (NRF)] or with nuclear matrix preparations from normal rat liver, azo dye (3'-MeDAB)-ind...

With the help of ultrashort laser pulses it has been possible to measure directly the population Lifetime of welldefined vrbrational modes of polyatomrc molecules in the liquid state. For a number of molecules the populatron decay was found to be of the order of picoseconds [l-l]. Special attention was pard to CH-stretching modes whrch are of considerable unportance for the radiatronless decay ...

The pandemic has rewritten the rules on accessing and using health data. Chris Stokel-Walker looks at how covid-19 changed what is allowed, whether things will go back to normal after crisis abated

1. We consider the half-filled Hubbard model with a cutoff forbidding momenta close to the angles of the square shaped Fermi surface. By Renormalization Group methods we find a convergent expansion for the Schwinger function up to exponentially small temperatures. We prove that the system is not a Fermi liquid, but on the contrary it behaves like a Marginal Fermi liquid, a behaviour observed in...

Effective infrared small target detection is still challenging due to sizes and the clutter in background. Unfortunately, many advanced methods do not perform well preserving detecting multi-scale objects complex scenes. We propose an targets method suppress background adapt with different sizes. Based on singular value analysis facet model, we a multi-derivative descriptor enhance various dual...

We are reporting a new non-Fermi liquid type normal phase that has a well defined Fermi energy, but without showing any non-regularity in the momentum distribution function nk in the whole momentum space, the sharp Fermi momentum concept being undefinable. The system contains a natural built in gap that is visible in the physical properties of the system at nonzero temperatures. The presence of...

We study the behaviour of the electronic chemical potential in YBa2Cu3O6+δ near the superconducting transition using the spin-wave exchange theory of pairing. We find that the experimental value of the jump in the temperature derivative of the chemical potential is inconsistent with the theoretical value calculated under the assumption of constant hole concentration. It is suggested that charge...