In-Plane Hall Effect in a RuO₂ Single Crystal.

Area of Science:

• Condensed Matter Physics
• Materials Science
• Solid-State Physics

Background:

• Ruthenium Dioxide (RuO2) is a technologically important material with unique electronic properties.
• Understanding its magneto-transport properties is crucial for advanced electronic applications.
• Previous studies have explored various aspects of RuO2, but in-plane phenomena require further investigation.

Purpose of the Study:

• To investigate the in-plane Hall effect in RuO2 single crystals.
• To analyze the magneto-transport anisotropy within different crystallographic planes.
• To explore the temperature dependence of the in-plane Hall resistivity and its harmonic content.

Main Methods:

• Fabrication of high-quality RuO2 single crystals.
• In-plane Hall effect measurements under varying magnetic fields and temperatures.
• Analysis of magneto-transport anisotropy using angular-dependent measurements.

Main Results:

• A 2π-periodic in-plane Hall effect was observed in the (101)/(001) and (110) planes of RuO2 single crystals.
• The in-plane Hall resistivity exhibited multiple harmonics and a nonlinear magnetic field dependence at lower temperatures.
• The observed phenomena suggest the influence of higher-order terms in the Hall vector at reduced temperatures.

Conclusions:

• The study reveals significant in-plane Hall effect and magneto-transport anisotropy in RuO2 single crystals.
• The emergence of multiple harmonics indicates complex electronic interactions and potentially higher-order effects.
• These findings contribute to a deeper understanding of the electronic behavior of RuO2 and its potential for novel electronic devices.