Portal de Periódicos da CAPES

Kondo cooling in quantum impurity systems

2024; American Physical Society; Volume: 109; Issue: 11 Linguagem: Inglês

10.1103/physrevb.109.115423

2469-9977

Xiangzhong Zeng, Daochi Zhang, Lyuzhou Ye, Long Cao, Rui‐Xue Xu, Xiao Zheng, Massimiliano Di Ventra,

Advanced Thermodynamics and Statistical Mechanics

The Peltier effect, which is the reverse counterpart of the Seebeck effect, has been experimentally observed in nanojunctions. Despite its potential applications in cooling nanoelectronic devices, achieving significant figures of merit and cooling power remain challenging. Here, we propose a novel approach to enable substantial Peltier cooling by leveraging orbital-Kondo states formed through strong electron correlations. We demonstrate this approach by showcasing a reverse heat current and reduced local temperature in a serially connected two-impurity junction, resulting in appreciable thermoelectric efficiency and cooling power. The discovery of this unconventional Kondo cooling phenomenon presents a promising avenue for nanorefrigeration and underscores the important role that strong electron correlations play in nonequilibrium quantum systems.