3,316 research outputs found
Classification of the line-soliton solutions of KPII
In the previous papers (notably, Y. Kodama, J. Phys. A 37, 11169-11190
(2004), and G. Biondini and S. Chakravarty, J. Math. Phys. 47 033514 (2006)),
we found a large variety of line-soliton solutions of the
Kadomtsev-Petviashvili II (KPII) equation. The line-soliton solutions are
solitary waves which decay exponentially in -plane except along certain
rays. In this paper, we show that those solutions are classified by asymptotic
information of the solution as . Our study then unravels some
interesting relations between the line-soliton classification scheme and
classical results in the theory of permutations.Comment: 30 page
Study of Microstructure of Chill Cast Aluminium Bronzes (Cu-Al-Fe-Mn)
Substantial information is available on the microstr-uctures of high tensile aluminium bronzes but most of the literature is pertaining to the alloys containing nickel. In the present paper authors have studies and presented the microstructures of various nickel-free aluminium bronze alloys containing iron and manganese. As an exhau-stive amount of work had been done at National Metall-urgical Laboratory to study the mechanical properties of such aluminium bronze alloys in the chill cast condition, the present microstructure study is also limited to the as cast alloys
Effects of antiferromagnetic planes on the superconducting properties of multilayered high-Tc cuprates
We propose a mechanism for high critical temperature (T_c) in the coexistent
phase of superconducting- (SC) and antiferromagnetic (AF) CuO_2 planes in
multilayered cuprates. The Josephson coupling between the SC planes separated
by an AF insulator (Mott insulator) is calculated perturbatively up to the
fourth order in terms of the hopping integral between adjacent CuO_2 planes. It
is shown that the AF exchange splitting in the AF plane suppresses the
so-called pi-Josephson coupling, and the long-ranged 0-Josephson coupling leads
to coexistence with a rather high value of T_c.Comment: 4 pages including 4 figure
Study of microstructure of chill cast aluminium bronzes (Cu-AI-Fe-Mn)
SUBSTANTIAL information is available on the microstru-ctures of high tensile aluminium -bronzes but most of
the literature is pertaining to the alloys containing nickel. Exhaustive amount of work was carried out by Gupta et al. at the National Metallurgical Laboratory
to study the mechanical properties of aluminium-bronze alloys in the chill-cast condition without nickel addition, the results of which have already been reported in an earlier paper. The present paper relates
to the study of microstructures of these chill-cast aluminium-bronze alloys. A few microstructures of
Cu-Al-Fe system have been given by Copper Development Association in their recent publication on aluminium-bronzes.
Sharp signature of DDW quantum critical point in the Hall coefficient of the cuprates
We study the behavior of the Hall coefficient, , in a system exhibiting
density-wave (DDW) order in a regime in which the carrier
concentration, , is tuned to approach a quantum critical point at which the
order is destroyed. At the mean-field level, we find that
evinces a sharp signature of the transition. There is a kink in
at the critical value of the carrier concentration, ; as the critical
point is approached from the ordered side, the slope of
diverges. Hall transport experiments in the cuprates, at high magnetic fields
sufficient to destroy superconductivity, should reveal this effect.Comment: 5 pages, 2 eps figure
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