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Strain-induced control of domain wall morphology in ultrathin PbTiO_3 films

机译：应变诱导的超薄PbTiO_3薄膜的畴壁形态控制

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摘要

Ab initio effective Hamiltonian simulations reveal a strain-induced control of domain morphology in epitaxial PbTiO_3 ultrathin films being under open-circuit electrical boundary conditions. More precisely, rather different out-of-plane domain structures are found to be the ground state, depending on the value of the misfit strain. Examples include domain walls lying in different crystallographic planes or even being wandering. Analysis of the computations allows us to reveal the precise interactions responsible for such strain-driven domain reorganization.
机译：从头开始的有效汉密尔顿模拟显示了在开路电边界条件下外延PbTiO_3超薄膜中应变诱导的畴形态控制。更精确地，根据失配应变的值，发现相当不同的平面外畴结构是基态。例子包括位于不同晶体学平面中或什至在徘徊的畴壁。计算分析使我们能够揭示造成这种应变驱动的域重组的精确相互作用。

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  • 来源
    《Physical review》 |2014年第21期|214113.1-214113.6|共6页
  • 作者

    Zhijun Jiang; Ruizhi Zhang; Dawei Wang; D. Sichuga; C.-L. Jia; L. Bellaiche;

  • 作者单位

    Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research,Xi'an Jiaotong University, Xi'an 710049, China;

    Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research,Xi'an Jiaotong University, Xi'an 710049, China,Department of Physics, State Key Laboratory of Photoelectric Technology and Functional Materials (Cultivation Base),Northwest University, Xi'an 710069, China;

    Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research,Xi'an Jiaotong University, Xi'an 710049, China;

    Physics Department, Augusta Technical College, Augusta, Georgia 30906, USA;

    Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research,Xi'an Jiaotong University, Xi'an 710049, China,Peter Gruenberg Institute and Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Research Center Juelich,D-52425 Juelich, Germany;

    Institute for Nanoscience and Engineering and Physics Department, University of Arkansas, Fayetteville, Arkansas 72701, USA;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    domain structure; hysteresis;

    机译：域结构;磁滞现象;

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