Landau–Zener spin transitions in Fe2+–Fe2+ quantum dots controlling dislocation mobility in NaCl:Fe crystalsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 8 февраля 2015 г.
Аннотация:Magnetic field induces transition in the distorted
Fe2?–Fe2? pairs (quantum dots) from the initial
bonding singlet state to the high spin antibonding state
providing decay of the pairs for two separated Fe2? ions.
Dislocations moving under internal stresses easily overcome
separated Fe2? ions in comparison with Fe2?–Fe2?
pairs lying close to the glide plane. Non-monotonous field
dependence of dislocation displacements under internal
stresses governed by short (100 ls) impulse of high magnetic
fields up to 31 T was revealed in NaCl:Fe crystals.
This non-typical dependence is the fingerprint of the Landau–
Zener non-adiabatic spin transition between singlet
and high spin states in quantum dots distorted by
mechanical stresses of moving dislocations.