TITLE

Crossover in thermal transport properties of natural, perovskite-structured superlattices

AUTHOR(S)
Chernatynskiy, Aleksandr; Grimes, Robin W.; Zurbuchen, Mark A.; Clarke, David R.; Phillpot, Simon R.
PUB. DATE
October 2009
SOURCE
Applied Physics Letters;10/19/2009, Vol. 95 Issue 16, p161906
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Atomic-level simulations are used to analyze the thermal-transport properties of a naturally layered material: the Ruddlesden–Popper phase, formed by interleaving perovskite layers of strontium titanate with strontium oxide rocksalt layers. The thermal conductivity parallel to the plane of structural layering is found to be systematically greater than that perpendicular to the layering. With decreasing number of perovskite blocks in the structure, a transition is seen from the thermal-transport properties of a bulk solid containing interfaces to that of an anisotropic monolithic material. The exact transition point should be temperature dependent and might enable tuning of the thermal conductance properties of the material.
ACCESSION #
44837265

 

Related Articles

  • First principles calculations on the origin of violet-blue and green light photoluminescence emission in SrZrO3 and SrTiO3 perovskites. Longo, Valéria M.; Cavalcante, Laécio S.; Costa, Maria G. S.; Moreira, Mário Lú; de Figueiredo, Alberthmeiry T.; Andrés, Juan; Varela, José A.; Longo, Elson // Theoretical Chemistry Accounts: Theory, Computation, & Modeling;Nov2009, Vol. 124 Issue 5/6, p385 

    The photoluminescence (PL) emission from SrZrO3 (SZ) and SrTiO3 (ST) crystalline, quasi-crystalline, and quasi-amorphous samples, prepared by the polymeric precursor method, was examined by ab initio quantum mechanical calculations. It was used in the modeling the structural model consisting of...

  • Segragation induced instabilities of granular fronts. Pouliquen, O.; Vallance, J.W. // Chaos;Sep99, Vol. 9 Issue 3, p621 

    Presents an experimental investigation of granular flows containing particles of several sizes and moving down slopes. Percolation of small particles downward; Migration of large ones toward the flow surface; Case of dry cohesionless flows; Theoretical analysis of the fingering instability.

  • Granular materials: Shaken sand - a granular fluid? Limbanhowar, Paul // Nature;8/21/2003, Vol. 424 Issue 6951, p886 

    Focuses on the microscopic behavior of granular materials. Connection between random grain motion and viscosity in shaken sand; Properties of granular materials; Spatial and temporal variations in quantities of granular materials.

  • Safety Assessment of Debris-flow Protection Works By DEM. Calvetti, Francesco; Nova, Roberto // AIP Conference Proceedings;7/1/2009, Vol. 1145 Issue 1, p1059 

    This paper concerns the analysis of dry debris-flows, and the safety assessment of debris-flow protection works. For this purpose, a reference debris-flow is analyzed by means of a 3D Distinct Element model. The study area, which is located in the Italian Alps (Piazzatorre, Lombardy), is...

  • Model-free Kinetic Analysis of Sr2FeMoO6 Re-crystallization Process Used for Double-Perovskite Monocrystals Grown by Bridgman Method. Bartha, Cristina; Plapcianu, Carmen; Palade, Petru; Vizman, Daniel // AIP Conference Proceedings;2015, Vol. 1694, p1 

    The synthesis routes for polycrystalline bulk Sr2FeMoO6 (SFMO), offer various possibilities, but in all the cases it is difficult to obtain a single phase of this compound. A new challenge in the field is to achieve mono-crystals using different growing routes and the Bridgman method represents...

  • Phase developments in Pb(Mg1/2W1/2)O3 and Pb(Zn1/2W1/2)O3 via B-site precursor route. Woo-Joon Lee; Nam-Kyoung Kim // Journal of Materials Science;May2008, Vol. 43 Issue 10, p3608 

    Phase formation stages of MgWO4 and ZnWO4 (precursor compositions for following steps) were investigated by monitoring the reactions of oxide chemicals at various temperatures. Developed phases were examined by using X-ray diffraction (XRD). Successive attempts were also conducted for...

  • The use of tangent stiffness to characterize the resilient response of unbound crushed aggregates. Konrad, J -M // Canadian Geotechnical Journal;Nov2006, Vol. 43 Issue 11, p1117 

    Repeated-load triaxial tests were conducted on crushed granitic base-course material to study the resilient response under different stress paths and compaction states. It has been established that the resilient response of this prestrained unbound granular material is best defined in terms of...

  • Pattern scaling in axial segregation. Charles, Christopher R. J.; Khan, Zeina S.; Morris, Stephen W. // Granular Matter;Mar2006, Vol. 8 Issue 1, p1 

    Granular tumbled frequently segregate by grain size along the axis of partially-filled, horizontal, rotating tubes. When segregation approaches saturation at the surface, a well-defined pattern of bands with wavelength ? emerges. The long-term dynamics of the pattern involves a much slower...

  • Sensitivity to solid volume fraction of gravitational instability in a granular medium. Bonnet, F�lix; Richard, Thierry; Philippe, Pierre // Granular Matter;May2010, Vol. 12 Issue 3, p317 

    We report experimental results on incipient dynamics of gravitational destabilization in an immersed granular medium. Two protocols have been used to reach instability: a progressive loading and a dam-break situation. The instability triggering, analyzed by high-speed imaging and CIV...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics