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Related Experiment Video

Updated: Jul 4, 2025

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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Published on: December 29, 2016

Quantum octets in high mobility pentagonal two-dimensional PdSe₂.

Yuxin Zhang¹, Haidong Tian¹, Huaixuan Li^2,3

¹Department of Physics, The Ohio State University, Columbus, OH, 43210, USA.

Nature Communications

|January 26, 2024

Summary

This summary is machine-generated.

Air-stable, few-layer palladium diselenide (PdSe2) field-effect transistors exhibit high mobility and large saturation currents. Magnetotransport studies reveal unique quantum oscillations, paving the way for novel electronic and spintronic applications.

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Area of Science:

Condensed Matter Physics
Materials Science
Nanotechnology

Background:

Two-dimensional (2D) materials offer unique properties tunable by external stimuli.
Ideal 2D materials for electronics require high mobility, air stability, and large-scale synthesis.
Atomically thin materials are crucial for next-generation electronic devices.

Purpose of the Study:

To demonstrate air-stable field-effect transistors (FETs) using few-layer palladium diselenide (PdSe2).
To investigate the electronic transport properties of PdSe2 FETs at various temperatures.
To explore the potential of PdSe2 for advanced electronic and spintronic applications.

Main Methods:

Fabrication of field-effect transistors using few-layer PdSe2 sandwiched between hexagonal boron nitride (hBN).
Electrical characterization including measurements of saturation current and field-effect mobility at 300 K and 2 K.
Low-temperature magnetotransport studies to analyze quantum oscillations and degeneracies.

Main Results:

Demonstrated air-stable PdSe2 FETs with high saturation current (>350 μA/μm).
Achieved high field-effect mobilities of ~700 cm^2/Vs at 300 K and ~10,000 cm^2/Vs at 2 K.
Observed unique quantum oscillations with 2-fold spin and 4-fold valley degeneracies, tunable by magnetic fields.

Conclusions:

Few-layer PdSe2 is a promising 2D material for high-performance, air-stable electronic devices.
The observed quantum phenomena suggest potential for realizing quantum Hall spin and orbital ferromagnetism.
PdSe2 transistors offer a platform for exploring novel quantum phenomena and future spintronic applications.