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Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems

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Published on: April 28, 2016

Giant Rashba splitting in PtTe/PtTe₂ heterostructure.

Runfa Feng¹, Yang Zhang¹, Jiaheng Li¹

¹State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing, PR China.

Nature Communications

|March 19, 2025

Summary

This summary is machine-generated.

Researchers created a novel PtTe/PtTe2 heterostructure from a centrosymmetric material, achieving significant Rashba spin splitting. This breakthrough enhances the potential of transition metal dichalcogenides for spintronic applications.

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Area of Science:

Materials Science
Condensed Matter Physics
Spintronics

Background:

Achieving large spin splitting is crucial for spintronic devices, but many atomically thin films lack inversion symmetry.
Centrosymmetric transition metal dichalcogenides (TMDCs) are generally unsuitable for spintronic applications due to their symmetry.

Purpose of the Study:

To develop a strategy for breaking inversion symmetry in centrosymmetric TMDCs.
To induce and investigate giant Rashba spin splitting in PtTe2-based heterostructures.
To explore the potential of TMMC/TMDC heterostructures for spintronics.

Main Methods:

Utilized thermal annealing to induce tellurium extraction from a PtTe2 bilayer.
Formed a naturally occurring PtTe/PtTe2 heterostructure.
Employed spin- and angle-resolved photoemission spectroscopy (SARPES) to probe electronic structure and spin polarization.

Main Results:

Successfully broke the inversion symmetry of the centrosymmetric PtTe2 bilayer.
Observed a giant Rashba spin splitting in the PtTe/PtTe2 heterostructure.
Quantified the Rashba coefficient as αR = 1.8 eV·Å via SARPES measurements.

Conclusions:

Demonstrated a facile method to create inversion symmetry breaking in centrosymmetric TMDCs.
The PtTe/PtTe2 heterostructure exhibits significant potential for spintronic applications.
This approach offers a viable pathway for utilizing TMDCs in advanced electronic devices.