Zobrazeno 1 - 10
of 186
pro vyhledávání: '"A.M. Bratkovsky"'
Autor:
A.M. Bratkovsky, A.P. Levanyuk
Publikováno v:
Philosophical Magazine. 90:113-124
We account for inhomogeneous strains, while calculating two characteristic thicknesses arising in the problem of critical thickness for ferroelectric memory. One of them marks the stability limit of the metastable single-domain state under zero bias
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d256e133963b432ace8b29f190adee74
https://doi.org/10.1080/14786430903250801
https://doi.org/10.1080/14786430903250801
Autor:
A.M. Bratkovsky
Publikováno v:
Proceedings of the IEEE. 97:1317-1328
We discuss the origin of negative index behavior that is observed in certain artificial structures known as metamaterials that are periodic structures supporting backward optical waves with generally antiparallel phase and group velocities. Slab-like
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e593e05796a6075bed370d042673e5f5
https://doi.org/10.1109/jproc.2009.2020443
https://doi.org/10.1109/jproc.2009.2020443
Autor:
A.M. Bratkovsky, A.P. Levanyuk
Publikováno v:
Physica C: Superconductivity and its Applications. :659-664
We consider two generic cases of proper ferroelastic phase transitions in thin epitaxial films. The domain structure, which forms at these transitions, is similar to either a 1 / a 2 / a 1 / a 2 or c / a / c / a structures in ferroelectric perovskite
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22a7f6311fd3f6f1934cad95c7ffe894
https://doi.org/10.1016/s0921-4534(01)00874-7
https://doi.org/10.1016/s0921-4534(01)00874-7
Publikováno v:
Physical Review Letters. 72:1734-1737
We discuss the Hall effect and resistivity above ${\mathit{T}}_{\mathit{c}}$, using a variant of the bipolaron theory which takes into account Anderson localization of the bosons by disorder. The model supposes that ${\mathit{R}}_{\mathit{H}}$=1/2${\
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41d2b9cab62ae312a055f441ed7c7af1
https://doi.org/10.1103/physrevlett.72.1734
https://doi.org/10.1103/physrevlett.72.1734
Publikováno v:
Superconductor Science and Technology. 6:755-760
A normal-state kinetic theory of copper-based oxides, which is an extension of BCS theory and Anderson localization to the strong-coupling limit lambda >1, is proposed. In this limit carriers are charged 2e bosons (small bipolarons) below and above T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f84d4c800631d5ccf138ac15245e1ead
https://doi.org/10.1088/0953-2048/6/10/009
https://doi.org/10.1088/0953-2048/6/10/009
Publikováno v:
Physica C: Superconductivity. 215:359-370
A significant change with temperature in intensity of the optical absorption spectrum of YBa 2 Cu 3 O 7−δ in the range 2000 to 10000 cm −1 at the superconducting transition is shown to be a manifestation of Bose-Einstein condensation of small bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f351b06f72e8481496c40c6886d82294
https://doi.org/10.1016/0921-4534(93)90236-j
https://doi.org/10.1016/0921-4534(93)90236-j
Autor:
A.V. Smirnov, A.M. Bratkovsky
Publikováno v:
Journal of Non-Crystalline Solids. :255-258
The first-principles tight-binding (TB) LMTO method of O.K. Andersen et al, is used for self-consistent calculations of the electronic structure of amorphous Ni66B34, Fe80B20 and ZrxBe1−x alloys in combination with the recursion method of R. Haydoc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63f5efe92f77753fdbffd9f6ae1f97a3
https://doi.org/10.1016/0022-3093(93)90173-u
https://doi.org/10.1016/0022-3093(93)90173-u
Autor:
G. F. Syrykh, A.M. Bratkovsky, A.V. Smirnov, N. A. Chernoplekov, S. L. Isakov, I.P. Sadikov, M. N. Hlopkin, S.N. Ishmaev
Publikováno v:
Journal of Non-Crystalline Solids. :72-75
The extensive study of the short-range order structure, atomic vibration spectrum and electronic properties of amorphous alloys Zr1−cBec (c = 0.3-0.5) is performed using neutron scattering and specific heat measurements. An increase in the Be conce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::570270dbb1621ab6f490ba60ee4f9d24
https://doi.org/10.1016/0022-3093(93)90132-h
https://doi.org/10.1016/0022-3093(93)90132-h
Autor:
A.M. Bratkovsky, A.V. Smirnov
Publikováno v:
Journal of Non-Crystalline Solids. :137-140
Studies of the effect of amorphisation on the local order and X-ray absorption fine structure as a probe for higher correlations are presented for the crystalline and amorphous alloys Ni2B. The Ni2B alloy has a trigonal prismatic order in the crystal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44e51799cd76c6427a4ff4710ab88ea8
https://doi.org/10.1016/0022-3093(93)90147-p
https://doi.org/10.1016/0022-3093(93)90147-p
Autor:
A.S. Alexandrov, A.M. Bratkovsky
Publikováno v:
Physical Review B. 80
Attractive electron correlations due to an electron-vibron interaction can overcome the direct Coulomb repulsion of polarons in deformable molecular quantum dots (MQDs). If it happens, a switching appears in the I-V characteristics of the degenerate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d4d253eb591964e6eb55e63d247acc40
https://doi.org/10.1103/physrevb.80.115321
https://doi.org/10.1103/physrevb.80.115321