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首页> 外文期刊>Physical review >Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS_2
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Possible origin of nonlinear conductivity and large dielectric constant in the commensurate charge-density-wave phase of 1T-TaS_2

机译：1T-TaS_2相称电荷密度波相中非线性电导率和大介电常数的可能起源

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摘要

The electric field dependence of the dielectric properties and the nonlinear conductance of 1T-TaS_2 below SO K has been investigated. A large dielectric constant of about 10~4 is obtained up to 10~7 Hz, which cannot be attributed to hopping of the localized carriers alone, the collective excitations of the commensurate charge-density-wave must be another contributor. The dielectric spectra disperse slightly in our measured temperature and frequency range. At a moderate dc bias field, the real part of the dielectric constant Є_1(ω) decreases. We propose that the separation of bound soliton-antisoliton pairs may be a contributor to the reduction of Є_1(ω) and the accompanying nonlinear conductivity with increasing dc bias.
机译：研究了介电性质的电场依赖性以及SOK以下1T-TaS_2的非线性电导。高达10〜7 Hz时可获得大约10〜4的大介电常数，这不能仅仅归因于局部载流子的跳跃，相应的电荷密度波的集体激发必定是另一个原因。介电谱在我们测得的温度和频率范围内略微分散。在中等的直流偏置磁场下，介电常数Є_1（ω）的实部减小。我们提出，孤立的孤子-反孤子对的分离可能有助于减小Є_1（ω）以及伴随直流偏置增加的非线性电导率。

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  • 来源
    《Physical review》 |2018年第19期|195117.1-195117.9|共9页
  • 作者

    Yongchang Ma; Yanhui Hou; Cuimin Lu; Lijun Li; Cedomir Petrovic;

  • 作者单位

    School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China,Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA,Key Laboratory of Display Materials and Photoelectric Devices (Tianjin University of Technology), Ministry of Education, Tianjin 300384, China;

    School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;

    School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China,Tianjin Key Lab for Photoelectric Materials and Devices, Tianjin 300384, China;

    Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA;

    Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA;

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