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Suppression of magnetoresistance in PtSe2 microflakes with antidot arrays

Zhaoguo Li1, Yong Zeng1, Minjie Zhou1

  • 1Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China.

Nanotechnology
|July 14, 2018
PubMed

Insights

Researchers suppressed magnetoresistance (MR) in platinum diselenide (PtSe2) microflakes using antidot arrays (AAs). This method enhances resistivity and MR suppression, offering potential for magnetic field sensor applications.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Magnetoresistance (MR) is a phenomenon where electrical resistance changes in response to a magnetic field.
  • Controlling MR is crucial for developing advanced magnetic field sensors.
  • Platinum diselenide (PtSe2) is a material with interesting electronic properties.

Purpose of the Study:

  • To investigate the effect of introducing antidot arrays (AAs) on the magnetoresistance (MR) of PtSe2 microflakes.
  • To explore a method for suppressing MR in PtSe2 for potential sensor applications.
  • To understand the underlying physical mechanisms responsible for MR suppression.

Main Methods:

  • Fabrication of PtSe2 microflakes.
  • Introduction of antidot arrays (AAs) into PtSe2 microflakes via milling.
  • Measurement and comparison of magnetotransport properties before and after AA introduction.

Main Results:

  • Observed enhanced resistivity in PtSe2 microflakes after milling AAs.
  • Demonstrated notable suppression of magnetoresistance (MR) in PtSe2 with AAs.
  • Attributed the MR suppression to increased electron scattering from electron-antidot interactions.

Conclusions:

  • Introducing antidot arrays (AAs) effectively suppresses magnetoresistance (MR) in PtSe2 microflakes.
  • The enhanced electron scattering due to electron-antidot interactions is the primary mechanism for MR suppression.
  • This approach provides a viable strategy for developing magnetic field sensors with suppressed MR.

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