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- W1966107323 abstract "We propose a quantum-mechanical theory of depinning of dislocation kinks. The interaction of the pinned state with the fluctuating host lattice is treated within the framework of the adiabatic approximation. It is shown that the polaron distortion of the lattice near the pinned kink affects essentially the magnitude of energy fluctuation required to activate a jump over the pinning barrier. The effect of quantum lattice fluctuations on the kinetics of breakaway at low temperatures is analyzed. We address also the question of the role of underbarrier tunnel paths in the fluctuation-induced escape of the kink from the pinning well and introduce the concept of a (temperature-dependent) quantum stress, above which the tunneling regime of breakaway becomes operative. The stress and temperature dependences of activation parameters characterizing the depinning process are discussed." @default.
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- W1966107323 date "1995-03-01" @default.
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- W1966107323 title "Quantum-mechanical theory of stress-assisted fluctuational breakaway of dislocation kinks from pinning centers in crystals" @default.
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- W1966107323 doi "https://doi.org/10.1103/physrevb.51.6319" @default.
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