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Related Experiment Video

Updated: Oct 6, 2025

Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials
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Residue-Free Fabrication of van der Waals Heterostructures of Two-Dimensional Materials

Published on: July 18, 2025

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Artificially created interfacial states enabled van der Waals heterostructure memory device.

Du Xiang1, Yi Cao1, Kun Wang2

  • 1Frontier Institute of Chip and System, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai 200438, People's Republic of China.

Nanotechnology
|January 13, 2022
PubMed
Summary

This study introduces a novel 2D memory device using van der Waals heterostructures (vdWH) with engineered interfacial states between hexagonal boron nitride (hBN) and molybdenum ditelluride (MoTe2). The device demonstrates reliable, tunable, and robust memory performance for advanced 2D electronics.

Keywords:
2D heterostructuregate tunable storage currentsinterfacial statesnon-volatile memory

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Van der Waals heterostructures (vdWH) performance is critically dependent on their 2D interface.
  • Interfacial states in vdWH typically require suppression for optimal charge transfer.
  • Artificial modulation of interfacial states offers new avenues for 2D device design.

Purpose of the Study:

  • To develop a 2D non-volatile memory device utilizing engineered interfacial states.
  • To investigate the performance characteristics of a hexagonal boron nitride (hBN)/molybdenum ditelluride (MoTe2) vdWH memory.
  • To explore the potential of interfacial-state engineering for novel 2D electronic applications.

Main Methods:

  • Fabrication of a 2D van der Waals heterostructure memory device using hBN and MoTe2.
  • Characterization of the device's memory properties, including data retention and write-erase cycles.
  • Analysis of the coupled optical and electrical responses governing the memory mechanism.
  • Testing device performance across a wide temperature range (100 K to 380 K).

Main Results:

  • Demonstrated a functional 2D non-volatile vdWH memory device based on artificially created interfacial states.
  • Achieved high reliability with data retention >10^4 s and >100 write-erase cycles.
  • Showcased precise control over storage currents via gate modulation, indicating tunable storage states.
  • Confirmed excellent device robustness within a wide temperature range, suitable for harsh environments.

Conclusions:

  • Interfacial-states engineering is a viable strategy for creating high-performance 2D vdWH memory devices.
  • The developed hBN/MoTe2 vdWH memory exhibits promising characteristics for future 2D electronics and optoelectronics.
  • This work opens new possibilities for designing advanced functional devices by manipulating interfacial properties.