SbSI 压缩纳米线中的界面极化现象

Interfacial Polarization Phenomena in Compressed Nanowires of SbSI.

作者信息

Starczewska Anna, Mistewicz Krystian, Kozioł Mateusz, Zubko Maciej, Stróż Danuta, Dec Jan

机构信息

Institute of Physics-Centre for Science and Education, Silesian University of Technology, 40-019 Katowice, Poland.

Faculty of Materials Engineering, Silesian University of Technology, 40-019 Katowice, Poland.

出版信息

Materials (Basel). 2022 Feb 18;15(4):1543. doi: 10.3390/ma15041543.

DOI:10.3390/ma15041543

PMID:35208079

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8874402/

Abstract

The systematic studies of the extrinsic Maxwell-Wagner-Sillars polarization process in compressed antimony sulfoiodide (SbSI) nanowires are carried out by dielectric spectroscopy. The dielectric response is studied in temperature (100≤T≤350) K and frequency (10-3≤f≤106) Hz ranges. Dielectric functions commonly used for the analysis of dielectric spectra related to intrinsic polarization processes were applied in the elaboration of experimental data. It was found that the respective "semi-circles" in the Cole-Cole-type plots display a characteristic pear-like shape for the ferroelectric phase. On the other hand, the data for the paraelectric phase form symmetrical arcs. This response is effectively parametrized using the experimental Cole-Davidson and Cole-Cole functions fitted to the data obtained for the ferroelectric and paraelectric phases, respectively. It is deduced that the particular shape of spectra in the ferroelectric phase is due to spontaneous polarization, which is responsible for an asymmetric broadening of relaxation functions related to the interfacial polarization.

摘要

通过介电谱对压缩硫碘化锑（SbSI）纳米线中的外在麦克斯韦-瓦格纳-西勒斯极化过程进行了系统研究。在温度范围（100≤T≤350）K和频率范围（10⁻³≤f≤10⁶）Hz内研究了介电响应。在处理实验数据时，应用了通常用于分析与本征极化过程相关的介电谱的介电函数。发现在科尔-科尔型图中，铁电相的各个“半圆”呈现出特征性的梨形。另一方面，顺电相的数据形成对称的弧线。分别使用拟合到铁电相和顺电相获得的数据的实验科尔-戴维森和科尔-科尔函数对这种响应进行了有效参数化。推断铁电相中光谱的特定形状是由于自发极化，它导致了与界面极化相关的弛豫函数的不对称展宽。