Published October 1999 | Version v1
Journal article Metadata-only

Influence of features of interatomic interaction on dynamics of lattice YBa2Cu3O7 (method of molecular dynamics

Creators

  • 1. Fiziko-Tekhnicheskij Inst. Ural'skogo Otdeleniya RAN, Izhevsk (Russian Federation)

Description

Dynamic properties of YBaCu3O7 high-temperature superconductor were studied by means of the molecular dynamics, It was shown that likewise in La1-xSrxCuO4 system due to the presence of the essential anharmonicity and the substantial difference in forces of interatomic interaction near the charge defects of Ba4+ within CuO2 and CuO planes the local hot ranges where the average kinetic energy of oxygen atom oscillations achieved about 0.5 eV came into being. All other types of defects: oxygen vacancies, copper vacancies, atom substitutions and charge defects did not result in such effects

Abstract (Russian)

Методом молекулярной динамики исследованы динамические свойства высокотемпературного сверхпроводника YBa2Cu3O7. Показано, что также как и в системе La1-xSrxCuO4, из-за наличия сильного ангармонизма и существенного различия в силах межатомного взаимодействия около зарядовых дефектов Ba4+ в плоскостях CuO2 и CuO возникают локальные горячие области, где средняя кинетическая энергия колебаний атомов кислорода достигает ∼ 0,5 эВ. Все другие типы дефектов: вакансии по кислороду, меди, замещения атомов и зарядовые дефекты к таким эффектам не приводят

Additional details

Additional titles

Original title (Russian)
Влияние особенностей сил межатомного взаимодействия на динамику решетки YBa

Publishing Information

Journal Title
Fizika Tverdogo Tela
Journal Volume
41
Journal Issue
10
Journal Page Range
p. 1729-1733
ISSN
0367-3294
CODEN
FTVTAC

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
31036771
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ANHARMONIC OSCILLATORS; BARIUM COMPOUNDS; CRYSTAL DEFECTS; CUPRATES; DISTRIBUTION FUNCTIONS; HIGH-TC SUPERCONDUCTORS; INTERATOMIC FORCES; KINETIC ENERGY; LATTICE VIBRATIONS; MOLECULAR DYNAMICS METHOD; VIBRATIONAL STATES; YTTRIUM COMPOUNDS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CALCULATION METHODS; COPPER COMPOUNDS; CRYSTAL STRUCTURE; ENERGY; ENERGY LEVELS; EXCITED STATES; FUNCTIONS; OXYGEN COMPOUNDS; SUPERCONDUCTORS; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS

Optional Information

Notes
30 refs., 4 figs.