A versatile model with three-dimensional triangular lattice for unconventional transport and various topological...

Area of Science:

• Condensed Matter Physics
• Materials Science
• Topological Materials

Background:

• Finite Berry curvature in topological materials drives phenomena like anomalous Hall effect (AHE), spin Hall effect (SHE), anomalous Nernst effect (ANE), and non-linear Hall effect (NLHE).
• Understanding and harnessing these effects requires precise and versatile theoretical models.

Purpose of the Study:

• To propose a versatile 3D triangular lattice model capable of hosting diverse topological phases.
• To investigate the unconventional transport phenomena arising from topological surface states in this model.
• To identify experimental material candidates exhibiting these topological properties.

Main Methods:

• Development of a 3D triangular lattice model with alternating hopping parameters.
• Theoretical analysis of topological phases, including kagome bands and degenerate fermions.
• Investigation of Berry curvature-induced transport phenomena (AHE, ANE, NLHE, photocurrent effects).

Main Results:

• The proposed lattice model successfully generates various topological phases.
• Unconventional transport phenomena, including AHE, ANE, NLHE, and topological photocurrent, are observed.
• Several experimentally synthesized material candidates exhibiting these topological properties were identified.

Conclusions:

• The 3D triangular lattice model serves as an excellent platform for studying Berry curvature-related physics.
• The identified material candidates offer practical avenues for exploring novel topological phenomena.
• This work bridges theoretical modeling with experimental realization for topological materials research.