# Charge Transport and Entropy Production Rate in Magnetically Active Molecular Dimer

## TL;DR

This paper investigates charge and thermal transport in a magnetically active molecular dimer, revealing how magnetic states influence current flow and how temperature can tune these transport properties for potential thermal rectification.

## Contribution

It introduces a detailed analysis of charge and thermal transport in a paramagnetic molecular dimer, highlighting magnetic control and the possibility of tuning into thermal rectification.

## Key findings

- Reduced currents in ferro- and anti-ferromagnetic regimes
- Charge current larger in ferromagnetic regime, thermal current blocked
- Temperature reduces exchange interaction, enabling thermal rectification

## Abstract

We consider charge and thermal transport properties of magnetically active paramagnetic molecular dimer. Generic properties for both transport quantities are reduced currents in the ferro- and anti-ferromagnetic regimes compared to the paramagnetic and efficient current blockade in the anti-ferromagnetic regime. In contrast, while the charge current is about an order of magnitude larger in the ferromagnetic regime, compared to the anti-ferromagnetic, the thermal current is efficiently blockaded there as well. This disparate behavior of the thermal current is attributed to current resonances in the ferromagnetic regime which counteract the thermal flow. The temperature difference strongly reduces the exchange interaction and tends to destroy the magnetic control of the transport properties. The weakened exchange interaction opens up a possibility to tune the system into thermal rectification, for both the charge and thermal currents.