Year: 2025
Type: article
Abstract: This study delves into the intrinsic nonlinear valley thermal effects, driven by a system’s quantum metric. Our findings elucidate that valley indices in the nonlinear effect are distinguishable by the thermoelectric correction to the orbital magnetization, which adopts opposite signs across valleys mirroring the role of orbital angular momentum in the linear valley Hall effect. Through a prototypical two-band model on an anisotropic tilted Dirac semimetal, we investigate how intrinsic material parameters modulate this nonlinear valley thermal response. Extending to realistic PT-symmetric anisotropic semiconductors, our findings enrich the understanding of valley-based phenomena, with implications for advanced theoretical and experimental pursuits in valleytronics and valley-caloritronics.
Source: Journal of Applied Physics
DOI: 10.1063/5.0279927
Authors: Shivam Sharma, Abir De Sarkar
Institution: Institute of Nano Science and Technology
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,500
Awards: G1217020743, G8288548627
OpenAlex ID: W4413288923