Unconventional Hall effect induced by Berry curvature

Area of Science:

• Condensed Matter Physics
• Materials Science
• Topological Materials

Background:

• Berry phase and Berry curvature are fundamental to topological physics.
• These phenomena significantly influence transport properties in solid-state systems.

Purpose of the Study:

• To investigate the Hall effect in topological material ZrTe5 flakes.
• To explore magnetotransport properties under in-plane magnetic fields.

Main Methods:

• Experimental measurement of Hall effect in ZrTe5 flakes.
• Application of in-plane magnetic fields parallel and perpendicular to the current.
• Theoretical analysis of magnetotransport properties.

Main Results:

• Observation of a novel, nonzero Hall effect in ZrTe5 flakes.
• Detection of both symmetric and antisymmetric components in in-plane Hall resistivity.
• Identification of anomalous velocity induced by Berry curvature as the origin.

Conclusions:

• The study reveals novel magnetotransport phenomena in topological materials.
• Findings enrich the understanding of the Hall effect family.
• Provides new insights into the role of Berry phase in topological materials.