Zobrazeno 1 - 10
of 443
pro vyhledávání: '"Buchenau, U."'
Autor:
Buchenau, U.
Publikováno v:
Phys. Rev. E 106, 024601 (2022)
The shear misfit model for the highly viscous flow is based upon a theoretical prediction for its terminal stage in terms of irreversible Eshelby relaxations in the five-dimensional shear space. The model is shown to predict a small delta-function (D
Externí odkaz:
http://arxiv.org/abs/2112.00587
Autor:
Buchenau, U.
The glass transition in hydrogen-bonded glass formers differs from the glass transition in other glass formers. The Eshelby rearrangements of the highly viscous flow are superimposed by strongly asymmetric hydrogen bond rupture processes, responsible
Externí odkaz:
http://arxiv.org/abs/2105.06392
Autor:
Buchenau, U.
The rapid structural and vibrational entropy decrease with decreasing temperature in undercooled liquids is explained in terms of the disappearance of local structural instabilities, which freeze in at the glass temperature as boson peak modes and lo
Externí odkaz:
http://arxiv.org/abs/2101.10980
The paper presents a description of the sound wave absorption in glasses, from the lowest temperatures up to the glass transition, in terms of three compatible phenomenological models. Resonant tunneling, the rise of the relaxational tunneling to the
Externí odkaz:
http://arxiv.org/abs/2012.10139
Autor:
Buchenau, U.
The strain field surrounding the center of low frequency vibrational modes is analyzed for numerically created binary glasses with a 1/r^10 repulsive interatomic potential. Outside the unstable inner core of five to twenty atoms, one finds a mixture
Externí odkaz:
http://arxiv.org/abs/2010.10870
Autor:
Buchenau, U.
The recent theoretical treatment of irreversible jumps between inherent states with a constant density in shear space is extended to a full theory, attributing the shear relaxation to structural Eshelby rearrangements involving the creation and annih
Externí odkaz:
http://arxiv.org/abs/2003.07246
Autor:
Buchenau, U.
Publikováno v:
Condens. Matter Phys., 2019, vol. 22, No. 4, 43601
Inelastic neutron scattering is not only capable of determining a generalized vibrational density of states around the boson peak of a glass, but can also be used to get information on the eigenvectors. The eigenvectors determine the dynamic structur
Externí odkaz:
http://arxiv.org/abs/1912.01929
Autor:
Buchenau, U.
The anharmonic soft modes studied in recent numerical work in the glass phase of simple liquids have an unstable core, stabilized by the positive restoring forces of the surrounding elastic medium. The present paper formulates an unstable core versio
Externí odkaz:
http://arxiv.org/abs/1907.04848
Autor:
Buchenau, U.
Supplemental Material to ArXiv:1902.02746
Externí odkaz:
http://arxiv.org/abs/1904.12805
Autor:
Buchenau, U.
The recent description of the cooling through the glass transition in terms of irreversible structural Eshelby rearrangements with a single average fictive temperature is extended to a distribution of fictive temperatures around the average one. The
Externí odkaz:
http://arxiv.org/abs/1904.12282