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Crossover from incoherent to coherent phonon scattering in epitaxial oxide superlattices.
Ravichandran, Jayakanth; Yadav, Ajay K; Cheaito, Ramez; Rossen, Pim B; Soukiassian, Arsen; Suresha, S J; Duda, John C; Foley, Brian M; Lee, Che-Hui; Zhu, Ye; Lichtenberger, Arthur W; Moore, Joel E; Muller, David A; Schlom, Darrell G; Hopkins, Patrick E; Majumdar, Arun; Ramesh, Ramamoorthy; Zurbuchen, Mark A.
Afiliação
  • Ravichandran J; 1] Applied Science and Technology Graduate Group, University of California, Berkeley, California 94720, USA [2] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA [3] [4].
  • Yadav AK; 1] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA [2] Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA [3].
  • Cheaito R; 1] Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA [2].
  • Rossen PB; Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA.
  • Soukiassian A; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Suresha SJ; Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
  • Duda JC; Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
  • Foley BM; Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
  • Lee CH; Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA.
  • Zhu Y; School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA.
  • Lichtenberger AW; Department of Electrical and Computer Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
  • Moore JE; 1] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA [2] Department of Physics, University of California, Berkeley, California 94720, USA.
  • Muller DA; 1] School of Applied and Engineering Physics, Cornell University, Ithaca, New York 14853, USA [2] Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA.
  • Schlom DG; 1] Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, USA [2] Kavli Institute at Cornell for Nanoscale Science, Cornell University, Ithaca, New York 14853, USA.
  • Hopkins PE; Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia 22904, USA.
  • Majumdar A; ARPA-E, US Department of Energy, 1000 Independence Avenue, Washington DC 20585, USA.
  • Ramesh R; 1] Applied Science and Technology Graduate Group, University of California, Berkeley, California 94720, USA [2] Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA [3] Department of Materials Science and Engineering, University of California, Berkeley,
  • Zurbuchen MA; 1] Department of Materials Science and Engineering, University of California, Los Angeles, California 90095, USA [2] Western Institute of Nanoelectronics, Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA [3] California NanoSystems Institute, Universi
Nat Mater ; 13(2): 168-72, 2014 Feb.
Article em En | MEDLINE | ID: mdl-24317186
ABSTRACT
Elementary particles such as electrons or photons are frequent subjects of wave-nature-driven investigations, unlike collective excitations such as phonons. The demonstration of wave-particle crossover, in terms of macroscopic properties, is crucial to the understanding and application of the wave behaviour of matter. We present an unambiguous demonstration of the theoretically predicted crossover from diffuse (particle-like) to specular (wave-like) phonon scattering in epitaxial oxide superlattices, manifested by a minimum in lattice thermal conductivity as a function of interface density. We do so by synthesizing superlattices of electrically insulating perovskite oxides and systematically varying the interface density, with unit-cell precision, using two different epitaxial-growth techniques. These observations open up opportunities for studies on the wave nature of phonons, particularly phonon interference effects, using oxide superlattices as model systems, with extensive applications in thermoelectrics and thermal management.
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Óxidos / Titânio / Compostos de Cálcio / Modelos Químicos Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article
Texto completo
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Texto completo: 1 Base de dados: MEDLINE Assunto principal: Óxidos / Titânio / Compostos de Cálcio / Modelos Químicos Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2014 Tipo de documento: Article