Zobrazeno 1 - 10
of 198
pro vyhledávání: '"D. M. Bercha"'
Publikováno v:
Acta Physica Polonica A. 126:1143-1145
Studies on the phases of CuInP2S6 crystal exhibiting phase transitions of the order-disorder type are performed. A possibility for the cooperative Jahn Teller e ect to occur in this crystal is analyzed. For this purpose, the procedure of constructing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddc0a16e37af887f0569842d11823c62
https://doi.org/10.12693/aphyspola.126.1143
https://doi.org/10.12693/aphyspola.126.1143
Publikováno v:
physica status solidi (b). 248:1446-1452
The ab initio band structure calculations of the T1GaSe 2 crystal in the framework of DFT, within LDA were performed using the relevant Brillouin zone for the base-centered monoclinic lattice. It was shown that the main features of this structure can
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::98e6437b672fff18a8d157f1fb9262ae
https://doi.org/10.1002/pssb.201046434
https://doi.org/10.1002/pssb.201046434
The band structure of a layered Hg3 TeCl4 crystal formed by energy states of HgCl2 and HgTe crystals
Publikováno v:
physica status solidi (b). 245:1571-1579
The ab-initio calculated band structure of a not as yet investigated orthorhombic Hg3TeCl4 crystal (Pbca, D152h) was analyzed by means of the elementary energy-bands concept. It was demonstrated that this band structure originates from that of a laye
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::370eb79858bed762320409b91dcc10b2
https://doi.org/10.1002/pssb.200743532
https://doi.org/10.1002/pssb.200743532
Publikováno v:
physica status solidi (b). 244:1318-1336
A concept of the elementary energy bands was applied to interpret the electronic energy spectra of crystals from the cubic system and the superlattices (GaAs)M/AlAsM (M = 5, 10), (Si)10/(Ge)10 built upon them. Based upon this example, it was shown th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::810949e6f55014015b08bf333b7b3cb0
https://doi.org/10.1002/pssb.200642426
https://doi.org/10.1002/pssb.200642426
Elementary energy bands in isovalent IV–VI orthorhombic and cubic crystals and their solid solutions
Autor:
D. M. Bercha, I. V. Slipukhina
Publikováno v:
physica status solidi (b). 244:650-668
It is shown that elementary energy bands concept can be applied to complex systems like solid solutions. As in the case of single crystals, the symmetry of elementary energy bands in the valence band of such systems is related to the actual Wyckoff p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::924381eb7c86175430827adf0d51e15a
https://doi.org/10.1002/pssb.200642263
https://doi.org/10.1002/pssb.200642263
Publikováno v:
Phase Transitions. 80:39-46
The possibility to describe the phase transformation in narrow-gap IV–VI-type semiconducting ferroelectrics, based upon the information about the symmetry of the elementary energy bands in the band structure of a given phase and the site symmetry o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8db156ce887659cc405f148f86d22430
https://doi.org/10.1080/01411590701315195
https://doi.org/10.1080/01411590701315195
Vibronic interaction in crystals with the Jahn-Teller centers in the elementary energy bands concept
Publikováno v:
Condensed Matter Physics, Vol 18, Iss 3, p 33705 (2015)
The order-disorder type phase transition caused by the vibronic interaction (collective Jahn-Teller effect) in a monoclinic CuInP$_2$S$_6$ crystal is analyzed. For this purpose, a trigonal protostructure model of CuInP$_2$S$_6$ is created, through a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f97be9a9461c2e9e26e750f9ded2978a
http://dspace.nbuv.gov.ua/handle/123456789/155266
http://dspace.nbuv.gov.ua/handle/123456789/155266
Publikováno v:
physica status solidi (b). 243:592-609
The existence of the physical elementary energy bands describing the Davydov splitting was demonstrated in the energy spectra of the layered orthorhombic In4Se3 crystal. It was confirmed that the physical elementary energy bands are related to the ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::520982b4946534098d82ca7544f4f302
https://doi.org/10.1002/pssb.200541176
https://doi.org/10.1002/pssb.200541176
Publikováno v:
physica status solidi (b). 241:845-855
A cross-rearrangement of the conduction band of a layered crystal intercalated with dopant atoms which create covalent bridges is discussed. The dispersion laws (including analytical ones) of splitted subbands of the conduction band and the following
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7cc14df2559fa819c1c127cb1f3a83e
https://doi.org/10.1002/pssb.200301948
https://doi.org/10.1002/pssb.200301948
Publikováno v:
Scopus-Elsevier
Semiconducting Tl 3 AsS 4 crystal was chosen as an example to show that its valence band is composed of the elementary energy bands. Their topology and symmetry obtained in the empty-lattice approximation is confirmed by ab initio band structure calc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d12b949615adc3f4263aaa7e4db77eef
https://doi.org/10.1002/pssa.200303917
https://doi.org/10.1002/pssa.200303917