Delta metal

Definitions

  • Chambers's Twentieth Century Dictionary
    • Delta metal a hard alloy of copper, zinc, and iron—the three metals symbolised by the triangular shape
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Etymology

Chambers's Twentieth Century Dictionary
Gr.,—Heb. daleth, a tent-door.

Usage

In literature:

Heated to a dull red delta metal becomes malleable and can be worked under the hammer, press or stamps.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 4" by Various
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In news:

Heavy Metal from the Delta - "When The Levee Breaks".
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In science:

While local density approximation/(+U) predicts half-metallicity in these defect-free delta-doped heterostructures, we demonstrate that local many-body correlations captured by Dynamical Mean Field Theory induce within the minority spin channel non-quasiparticle states just above EF .
Absence of halfmetallicity in defect-free Cr, Mn-delta-doped Digital Magnetic Heterostructures
Our results of the electronic structure calculations based on LSDA predict that the defect free delta doped digital magnetic heterostructures are half-metals in agreement with previous calculations .
Absence of halfmetallicity in defect-free Cr, Mn-delta-doped Digital Magnetic Heterostructures
We expect the spectral function for the “d –wave ” gap (Case III), to behave in a broadly similar way, but to be shifted by a smaller amount relative to the metal and to exhibit additional spectral weight in the gap region 0 < ω < ∆, with correspondingly less weight in the threshold delta function.
Orthogonality Catastrophe Revisited
Metal rich models with “delta function” hot components (as in Fig 10b and c) can fit some of the intermediate UVX galaxies, but these models are less plausible since they would require a small mass dispersion among the EHB stars present and thus a very finely tuned mass loss mechanism.
Ultraviolet Radiation from Evolved Stellar Populations: II. The Ultraviolet Upturn Phenomenon in Elliptical Galaxies
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