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Intrinsic semiconductors are highly pure materials with no impurities. At absolute zero, these semiconductors behave as perfect insulators because all the valence electrons are bound, and the conduction band is empty, disallowing electrical conduction. The Fermi level is a concept used to describe the probability of occupancy of energy levels by electrons at thermal equilibrium. In intrinsic semiconductors, the Fermi level is positioned at the midpoint of the energy gap at absolute zero. When...

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Updated: Feb 16, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy

Published on: April 8, 2018

Single Atomic Layer Ferroelectric on Silicon.

Mehmet Dogan, Stéphanie Fernandez-Peña¹, Lior Kornblum

¹Department of Quantum Matter Physics, Université de Genève , Genève 1211, Switzerland.

|December 16, 2017

Summary

This summary is machine-generated.

A single atomic layer of zirconium dioxide (ZrO2) shows ferroelectric properties on silicon, enabling smaller electronic devices. This breakthrough material allows for reversible polarization, paving the way for next-generation electronics beyond complementary metal-oxide-semiconductor (CMOS) technology.

Keywords:

Ferroelectric phenomena metal oxide semiconductor devices nonvolatile memories zirconium oxide

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Area of Science:

Materials Science
Solid State Physics
Nanotechnology

Background:

Ferroelectric materials exhibit spontaneous electric polarization switchable by an external electric field.
Conventional ferroelectrics require a minimum thickness (5-10 nm) for observable hysteretic behavior.
Scaling down electronic devices necessitates novel materials with enhanced properties at the nanoscale.

Purpose of the Study:

To investigate the ferroelectric properties of a single atomic layer of zirconium dioxide (ZrO2) grown on silicon.
To explore the potential of monolayer ferroelectrics for advanced electronic device applications.
To demonstrate the feasibility of achieving ferroelectric switching at the atomic scale.

Main Methods:

Growth of an atomically abrupt interface between a single atomic layer of ZrO2 and silicon.
Capacitance-voltage (C-V) measurements to detect hysteresis and polarization switching.
First-principles computations to confirm stable polarization states and energy level shifts in silicon.

Main Results:

A single atomic layer of ZrO2 exhibits clear ferroelectric switching behavior.
Hysteresis in C-V measurements indicates reversible polarization coupling with silicon carriers.
Computational results confirm multiple stable polarization states and associated energy shifts in silicon.

Conclusions:

Monolayer ZrO2 represents a new class of materials for next-generation electronic devices.
This atomically thin ferroelectric enables more aggressive device scaling compared to bulk ferroelectrics.
The study demonstrates the potential for transcending conventional complementary metal-oxide-semiconductor (CMOS) technology limits.