منابع مشابه
Photoemission spectra in t-J ladders with two legs.
Photoemission spectra for the isotropic two-leg t-J ladder are calculated at various hole-doping levels using Exact Diagonalization techniques. Lowenergy sharp features caused by short-range antiferromagnetic correlations are observed at finite doping levels close to half-filling, above the naive Fermi momentum. These features should be observable in angle-resolved photoemission experiments. In...
متن کاملCollective density-wave excitations in two-leg Sr14-xCaxCu24O41 ladders.
Raman measurements in the 1.5-20 cm(-1) energy range were performed on single crystals of Sr14-xCaxCu24O41. A quasielastic scattering peak (QEP) which softens with cooling is observed only in the polarization parallel to the ladder direction for samples with x=0, 8, and 12. The QEP is a Raman fingerprint of pinned collective density wave excitations screened by uncondensed carriers in the ladde...
متن کاملMixed Ladder Determinantal Varieties from Two-sided Ladders
We study the family of ideals defined by mixed size minors of two-sided ladders of indeterminates. We compute their Gröbner bases with respect to a skewdiagonal monomial order, then we use them to compute the height of the ideals. We show that these ideals correspond to a family of irreducible projective varieties, that we call mixed ladder determinantal varieties. We show that these varieties ...
متن کاملThe optimal rubbling number of ladders, prisms and Möbius-ladders
A pebbling move on a graph removes two pebbles at a vertex and adds one pebble at an adjacent vertex. Rubbling is a version of pebbling where an additional move is allowed. In this new move, one pebble each is removed at vertices v and w adjacent to a vertex u, and an extra pebble is added at vertex u. A vertex is reachable from a pebble distribution if it is possible to move a pebble to that v...
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Recovery of ripped-up documents is a problem that often arises in archival study and investigation science. The growing interest in featureless image mosaicing is because of its demand as it is still in incubation stage. The use of mosaicing torn document images is that it has reliable performance, fast document recovery capability and onscreen visual verification. Further, Most document recons...
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ژورنال
عنوان ژورنال: Nature
سال: 2007
ISSN: 0028-0836,1476-4687
DOI: 10.1038/nj7130-948b