Semiconductor-less vertical transistor with I_ON/I_OFF of 10⁶

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Solid-state transistors traditionally rely on semiconductors.
• Existing 2D van der Waals heterostructure devices face challenges in controlling tunneling and ballistic currents.
• Semiconducting channels are currently essential for practical electronic switching.

Purpose of the Study:

• To introduce a novel semiconductor-less solid-state electronic device.
• To demonstrate industry-applicable switching of ballistic current.
• To address the limitations of temperature-dependent performance in 2D van der Waals devices.

Main Methods:

• Fabrication of a device utilizing the graphene-hexagonal boron nitride interface.
• Modulation of field emission barrier height for current control.
• Analysis of device performance using transfer curves and temperature stability tests.

Main Results:

• Achieved an ON/OFF current ratio (I_ON/I_OFF) of 10⁶.
• Demonstrated adjustable intrinsic gain up to 4.
• Exhibited exceptional current stability across a wide temperature range (15-400 K).

Conclusions:

• The developed semiconductor-less device offers a viable alternative to traditional semiconductor-based transistors.
• This technology resolves temperature-dependent performance issues, enhancing device reliability.
• The findings open new avenues for 2D van der Waals devices in extreme environment applications.