Preferred Label : Mott transition;
IUPAC definition : A transition occurring only in 'single-valent' systems from strongly correlated (U
W) to weakly correlated (U W) electrons as a result of a change of bandwidth W.
W reflects the strength of the interatomic interactions in a periodic array of like
atoms and U is a measure of the intra-atomic interactions, i.e. the electrostatic
energy involved in the creation of polar states by transferring an electron from one
atom to the next, as shown schematically by the disproportionation reaction: \[{M}
{n } {M} {n }\rightarrow {M} {(n 1) } {M} {(n- 1) }\] A U W produces a magnetic
semiconductor; a U W gives rise to a metal (normally nonmagnetic). Note also that
U and W can be altered by changes in interatomic distances, brought about through
temperature or pressure variations or by introducing an alloying element. Synonymous
with Mott–Hubbard transition.;
Origin ID : M04037;
See also
A transition occurring only in 'single-valent' systems from strongly correlated (U
W) to weakly correlated (U W) electrons as a result of a change of bandwidth W.
W reflects the strength of the interatomic interactions in a periodic array of like
atoms and U is a measure of the intra-atomic interactions, i.e. the electrostatic
energy involved in the creation of polar states by transferring an electron from one
atom to the next, as shown schematically by the disproportionation reaction: \[{M}
{n } {M} {n }\rightarrow {M} {(n 1) } {M} {(n- 1) }\] A U W produces a magnetic
semiconductor; a U W gives rise to a metal (normally nonmagnetic). Note also that
U and W can be altered by changes in interatomic distances, brought about through
temperature or pressure variations or by introducing an alloying element. Synonymous
with Mott–Hubbard transition.
