当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Anatase TiO2—A Model System for Large Polaron Transport
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-10-17 00:00:00 , DOI: 10.1021/acsami.8b11643 Bixing Yan 1 , Dongyang Wan 1 , Xiao Chi 2 , Changjian Li 3 , Mallikarjuna Rao Motapothula 1 , Sonu Hooda 1 , Ping Yang 2 , Zhen Huang 1 , Shengwei Zeng 1 , Akash Gadekar Ramesh 1 , Stephen John Pennycook 3 , Andrivo Rusydi 1, 2 , Ariando 1 , Jens Martin , Thirumalai Venkatesan 1, 3, 4, 5
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-10-17 00:00:00 , DOI: 10.1021/acsami.8b11643 Bixing Yan 1 , Dongyang Wan 1 , Xiao Chi 2 , Changjian Li 3 , Mallikarjuna Rao Motapothula 1 , Sonu Hooda 1 , Ping Yang 2 , Zhen Huang 1 , Shengwei Zeng 1 , Akash Gadekar Ramesh 1 , Stephen John Pennycook 3 , Andrivo Rusydi 1, 2 , Ariando 1 , Jens Martin , Thirumalai Venkatesan 1, 3, 4, 5
Affiliation
|
Large polarons have been of significant recent technological interest as they screen and protect electrons from point-scattering centers. Anatase TiO2 is a model system for studying large polarons as they can be studied systematically over a wide range of temperature and carrier density. The electronic and magneto transport properties of reduced anatase TiO2 epitaxial thin films are analyzed considering various polaronic effects. Unexpectedly, with increasing carrier concentration, the mobility increases, which rarely happens in common metallic systems. We find that the screening of the electron–phonon (e–ph) coupling by excess carriers is necessary to explain this unusual dependence. We also find that the magnetoresistance could be decomposed into a linear and a quadratic component, separately characterizing the carrier transport and trapping as a function of temperature, respectively. The various transport behaviors could be organized into a single phase diagram, which clarifies the evolution of large polaron in this material.
中文翻译：
锐钛矿TiO 2-大型极化子传输的模型系统
大型极化子具有屏蔽和保护电子不受点散射中心影响的最新技术兴趣。锐钛矿型TiO 2是用于研究大极化子的模型系统，因为它们可以在很宽的温度和载流子密度范围内系统地研究。还原的锐钛矿型TiO 2的电子和磁输运性质考虑到各种极化效应，对外延薄膜进行了分析。出乎意料的是，随着载流子浓度的增加，迁移率增加，这在常见的金属系统中很少发生。我们发现，通过过量载流子筛选电子-声子（e-ph）耦合对于解释这种异常的依赖性是必要的。我们还发现，磁阻可以分解为线性和二次分量，分别将载流子的传输和俘获分别表征为温度的函数。各种传输行为可以组织成一个单相图，从而阐明了这种材料中大极化子的演化。
更新日期：2018-10-17
中文翻译：
锐钛矿TiO 2-大型极化子传输的模型系统
大型极化子具有屏蔽和保护电子不受点散射中心影响的最新技术兴趣。锐钛矿型TiO 2是用于研究大极化子的模型系统，因为它们可以在很宽的温度和载流子密度范围内系统地研究。还原的锐钛矿型TiO 2的电子和磁输运性质考虑到各种极化效应，对外延薄膜进行了分析。出乎意料的是，随着载流子浓度的增加，迁移率增加，这在常见的金属系统中很少发生。我们发现，通过过量载流子筛选电子-声子（e-ph）耦合对于解释这种异常的依赖性是必要的。我们还发现，磁阻可以分解为线性和二次分量，分别将载流子的传输和俘获分别表征为温度的函数。各种传输行为可以组织成一个单相图，从而阐明了这种材料中大极化子的演化。
京公网安备 11010802027423号