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Exploring Atomically Thin Van Der Waals Metals for Spintronics

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Technical Report,01 May 2016,30 Apr 2019

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Pennsylvania State University University Park United States

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In the first year of the project period, our lab has focused on developing new experimental techniques to control the valley magnetization in 2D transition metal dichalcogenide TMD semiconductors. Although control of the electron valley degree of freedom in 2D TMD semiconductors by light and magnetic fields is now routine, practical valleytronics requires pure electrical control of the electron valley. Also, the demonstrated magnetic control of the electron valley needs very high magnetic fields and is very inefficient. To overcome these issues we have developed techniques to fabricate both high electron mobility and strain tunable monolayer TMD transistor devices. The strain-engineered transistor devices have allowed us to demonstrate anew valley magnetoelectric effect, i.e. the pure electrical generation of valley magnetization in monolayer TMDs published in Nature Materials. The resultant valley magnetization has been probed and imaged by magneto-optical microscopy techniques.

Subject Categories:

  • Electricity and Magnetism
  • Metallurgy and Metallography

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