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Related Concept Videos

Metal-Semiconductor Junctions01:24

Metal-Semiconductor Junctions

352
The contact of metal and semiconductor can lead to the formation of a junction with either Schottky or Ohmic behavior.
Schottky Barriers
Schottky barriers arise when a metal with a work function (Φm) contacts a semiconductor with a different work function (Φs). Initially, electrons transfer until the Fermi levels of the metal and semiconductor align at equilibrium. For instance, if Φm > Φs, the semiconductor Fermi level is higher than the metal's before contact. The...
352

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Edge-by-Edge Lateral Heterostructure through Interfacial Sliding.

Zhiwei Li1, Longbin Zhang1, Songlong Liu1

  • 1Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China.

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Summary

Researchers developed a new method to create lateral van der Waals heterostructures (vdWHs) by sliding 2D materials. This technique enables edge-to-edge contact, overcoming previous limitations in fabricating these advanced semiconductor devices.

Keywords:
cracking-healingedge contactinterfacial slidinglateral heterojunction

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Van der Waals heterostructures (vdWHs) are crucial in 2D semiconductor research.
  • Current vdWHs primarily use vertical structures with large overlaps.
  • Fabricating lateral heterostructures with edge-to-edge contact is challenging due to nanoscale manipulation difficulties.

Purpose of the Study:

  • To demonstrate a novel interfacial sliding approach for creating edge-to-edge lateral contacts in 2D materials.
  • To overcome the limitations of current methods for fabricating lateral vdWHs.
  • To explore the potential of this method for both 2D and 3D thin film heterojunctions.

Main Methods:

  • Development of an interfacial sliding technique by stretching vertical vdWHs.
  • Utilizing controlled strain to induce lateral movement of 2D flakes.
  • Characterization using microscopy and in situ electrical measurements.

Main Results:

  • Successful conversion of vertical vdWHs into lateral heterojunctions with intimate edge contact.
  • Observation of carrier tunneling behavior in the fabricated lateral structures.
  • Demonstration of the method's applicability to 2D/3D and 3D/3D thin film Schottky junctions.

Conclusions:

  • The interfacial sliding approach provides a facile route to fabricating lateral vdWHs.
  • This method enables precise control over edge contact for 2D materials.
  • The technique is versatile and extends to creating lateral junctions with 3D thin films.