V2EX hall-effect

Hall Effect

Definition / 定义

霍尔效应:当电流通过导体或半导体,并在垂直于电流方向施加磁场时,载流子会受到洛伦兹力偏转,在材料横向产生电压差(称为霍尔电压)的现象。常用于测量磁场强度、判断载流子类型(电子或空穴)以及估算载流子浓度等。

Pronunciation / 发音

/hl fekt/

Examples / 例句

The Hall effect helps engineers measure magnetic fields in sensors.
霍尔效应帮助工程师在传感器中测量磁场。

By analyzing the Hall effect in a semiconductor, researchers can determine whether electrons or holes dominate conduction.
通过分析半导体中的霍尔效应,研究人员可以判断导电主要由电子还是空穴主导。

Etymology / 词源

“Hall effect”得名于美国物理学家Edwin Herbert Hall(埃德温赫伯特霍尔),他在1879年首次实验观察并报告了这一现象;“effect”表示“效应/现象”。该术语随后在电磁学与固体物理学中成为基础概念之一。

Related Words / 相关词

Literary Works / 文学与著作例

  • The Feynman Lectures on Physics(《费曼物理学讲义》)在电磁学相关章节讨论带电粒子在磁场中的偏转与测量思想,常与霍尔效应联系讲解。
  • Introduction to Solid State Physics by Charles Kittel(《固体物理导论》)在载流子与输运性质部分介绍霍尔效应及其在半导体中的应用。
  • Solid State Electronic Devices by Ben G. Streetman & Sanjay Banerjee(《固态电子器件》)用霍尔测量来说明载流子浓度、迁移率等参数的提取方法。
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