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A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
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The interface between Gd and monolayer MoS2: a first-principles study.

Xuejing Zhang1, Wenbo Mi1, Xiaocha Wang2

  • 1Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparation Technology, Faculty of Science, Tianjin University, Tianjin 300072, China.

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|December 9, 2014
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Summary
This summary is machine-generated.

Gadolinium (Gd) interfaces with molybdenum disulfide (MoS2) create strong chemical bonds, enabling spin injection. This research explores Gd-MoS2 interactions for spintronic applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Surface Science

Background:

  • Molybdenum disulfide (MoS2) is a 2D material with potential in electronics.
  • Investigating interfaces with magnetic materials is crucial for spintronic applications.

Purpose of the Study:

  • To analyze the electronic structure of interfaces between Gd(0001) and monolayer MoS2.
  • To determine the potential of Gd as a material for spin injection into MoS2.

Main Methods:

  • First-principles calculations were employed to study interfaces of varying Gd layer thickness (2, 4, and 6 layers) with monolayer MoS2.

Main Results:

  • Strong chemical bonding was observed, shifting the MoS2 Fermi energy into the conduction band.
  • New Gd d states hybridized with Mo 4d states at the interface, inducing high spin polarization.
  • Ferromagnetically ordered Mo magnetic moments of 0.15 μB were found.

Conclusions:

  • Gd is a promising candidate for efficient spin injection into monolayer MoS2.
  • The observed electronic and magnetic properties at the Gd-MoS2 interface are significant for future spintronic devices.