Design strategy for ferroelectric-based polar metals with dimensionality-tunable electronic states

作     者：Chao Ma KuiJuan Jin 

作者机构：Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences 

基　　金：supported by the National Key Basic Research Program of China(Grant No.2014CB921001) the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(Grant No.XDB07030200) the Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(Grant No.QYZDJ-SSW-SLH020) the National Key Research and Development Program of China(Grant No.2017YFA0303604) the National Natural Science Foundation of China(Grant Nos.11721404,and11674385) 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2018年第61卷第9期

页      码：69-74页

摘      要：Since LiOsO_3 was discovered, obtaining easy-accessible polar metals for research and applications has been challenging. In this paper, we present a multilayer design strategy, which is configured as ferroelectric layer/carrier reservoir layer/isolation layer/substrate, for obtaining polar metals by electrostatically doping a strained ferroelectric material in a more effective way. In the proposed configuration, both 1 unit-cell thick BaTiO_3 and PbTiO_3 exhibited considerable Ti off-centering with various strains,which should extend the applicability of ferroelectric-based polar metals in ultra-thin devices. Moreover, engineered by the compressive strain and the BaTiO_3 thickness, the design strategy effectively achieved polar metallicity and dimensionalitytunable electronic states associated with the modulation of highly anisotropic properties such as electrical and electronic thermal conductivity, which may be helpful for designing ultra-thin, ultrafast, and low-power switch devices.

主 题 词：设计策略 电子状态 铁电体 金属 维数 BaTiO3 PbTiO3 开关设备 

学科分类：08[工学] 0805[工学-能源动力学] 080502[080502] 0704[理学-天文学类] 

核心收录：

D　O　I：10.1007/s11433-018-9245-4

馆 藏 号：203306226...