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CROSSWORD
ANSWER

rkk

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The answer RKK has 1 possible clue(s) in existing crosswords.

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The word RKK is NOT valid in any word game. (Sorry, you cannot play RKK in Scrabble, Words With Friends etc)

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Definitions of rkk in various dictionaries:

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Possible Crossword Clues
'Today' rival, for short

Last Seen in these Crosswords & Puzzles
Jun 6 2004 New York Times

Rkk might be related to
RKKY stands for Ruderman–Kittel–Kasuya–Yosida and refers to a coupling mechanism of nuclear magnetic moments or localized inner d- or f-shell electron spins in a metal by means of an interaction through the conduction electrons. The RKKY interaction is the J/t >> 1 limit of the double exchange interaction. * The RKKY interaction was originally proposed by Malvin Ruderman and Charles Kittel of the University of California, Berkeley, as a means of explaining unusually broad nuclear spin resonance lines that had been observed in natural metallic silver. The theory uses second-order perturbation theory to describe an indirect exchange coupling whereby the nuclear spin of one atom interacts with a conduction electron through the hyperfine interaction, and this conduction electron then interacts with another nuclear spin, thus creating a correlation energy between the two nuclear spins. (Alternatively, instead of nuclear spins coupling to conduction spins through the hyperfine interaction, another scenario is for inner electron spins to couple to conduction spins through the exchange interaction.) The theory is based on Bloch wavefunctions and is therefore only applicable to crystalline systems. The derived exchange interaction takes the following form: * * * * H * ( * * * R * * * i * j * * * ) * = * * * * * * I * * * i * * * ⋅ * * * I * * * j * * * * 4 * * * * * * * * \| * * Δ * * * k * * m * * * * k * * m * * * * * \| * * * 2 * * * * m * * ∗ * * * * * ( * 2 * π * * ) * * 3 * * * * R * * i * j * * * 4 * * * * ℏ * * 2 * * * * * ...

Rkk might be related to

RKKY stands for Ruderman–Kittel–Kasuya–Yosida and refers to a coupling mechanism of nuclear magnetic moments or localized inner d- or f-shell electron spins in a metal by means of an interaction through the conduction electrons. The RKKY interaction is the J/t >> 1 limit of the double exchange interaction.
* The RKKY interaction was originally proposed by Malvin Ruderman and Charles Kittel of the University of California, Berkeley, as a means of explaining unusually broad nuclear spin resonance lines that had been observed in natural metallic silver. The theory uses second-order perturbation theory to describe an indirect exchange coupling whereby the nuclear spin of one atom interacts with a conduction electron through the hyperfine interaction, and this conduction electron then interacts with another nuclear spin, thus creating a correlation energy between the two nuclear spins. (Alternatively, instead of nuclear spins coupling to conduction spins through the hyperfine interaction, another scenario is for inner electron spins to couple to conduction spins through the exchange interaction.) The theory is based on Bloch wavefunctions and is therefore only applicable to crystalline systems. The derived exchange interaction takes the following form:
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