The Influence of Quantum Effects on the Low‐Temperature Creep of Zinc Crystals

Нацик, В. Д.; Osetskii, A. I.; Soldatov, V. P.; Startsev, V. I.

doi:10.1002/pssb.2220540108

Cited by 78 publications

(2 citation statements)

References 17 publications

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“…The same logarithmic form of ε(t) curves was established for pure n-H 2 also 16 . It is typical for the slip of dislocations, overcoming existing obstacles in the crystal with the help of thermal 17 or with the participation of quantum fluctuations 18 . As judged by Q value the possible deformation mechanism of irradiated n-H 2 is provided by the dislocations, which overcome the connected with ortho -subsystem barriers 13,20 .…”

Section: Resultsmentioning

confidence: 99%

Effect of infrared radiation on the plasticity of solid hydrogen

Алексеева

2011

Phys. Solid State

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Due to the large amplitude of zero-point lattice vibration, the crossover to a liquid-liked state may take place for quantum (including Hydrogen) crystals at sufficiently low (in comparison with θD Debye) temperatures. The superplasticity of solid Hydrogen may consider as sign of such crossover or may precede to it. It is known also, that solid H2 possesses a rather strong infrared (IR) induced absorption due to electric dipole moments of molecules, caused by intermolecular (mainly long-range electrostatic) forces. There is the probability to reach the superplastic of solid H2 samples behavior therefore by an artificial way-as a consequence of IRradiation simply. We have found, however, that at temperatures in close proximity to about 1.6×10-2 θD it is not possible to receive the super-plasticity of solid H2 artificially by IRradiation only. Vice versa, IRradiation acting over and over again on the samples in sufficiently long time may totally destroy the quantum character of plasticity H2 by reason of increasing of sample temperature. The arising failure for tunnel levels of defects, which provide the deformation of H2, leads to breakdown of conditions for realizing of its super-plasticity as a purely quantum nature of phenomenon. But at first time moments, corresponding to initial IRradiation, the strong jumps of deformation value of H2 were observed. The experiments were carried out at temperatures 1.8-4.2 K on both-n-H2 (75% o-H2) and p-H2 (0.2% o-H2) Hydrogen crystals. Samples were tested in regime of unsteady creep under axial extension load of constant value. After some-minutes of dark interval creep the samples were illuminated by invisible infrared light.

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Section: Resultsmentioning

confidence: 99%

Effect of infrared radiation on the plasticity of solid hydrogen

Алексеева

2011

Phys. Solid State

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“…The theory of thermally activated processes is based on the classical theory of absolute reaction rates [78], and the limitations of this concept have been frequently discussed for the case of atomic migration in solids [79 to 821. I n the case of dislocation motion past localized obstacles, classical thermodynamics is probably valid down t o the lowest experimental temperatures, as zero-point vibrations do not interfere because of the "macroscopic" length of a dislocation segment [76, 831 (see, however, Natsik et al [84] for a different point of view. )…”

Section: Thermal Activation and Dragmentioning

confidence: 99%