# General information about the project

The rapid progress in miniaturization of electronic devices inevitably brings the current technology closer to a certain natural limit, when the manipulation of individual molecules, atoms or spins will constitute the basis for processing and storing information. Regardless of how distant this perspective seems to be, comprehensive understanding of physics at the nanoscale will certainly be of vital importance. The theoretical studies of transport properties of nanoscale systems, such as molecules, quantum dots or nanowires, due to strong electron correlations, are very demanding and the methods used are very often based on a series of approximations. Consequently, there are relatively few results that can be considered as benchmarks, and which can be directly compared to experiments. The aim of this project is to provide very accurate results and new predictions for problems that have not been studied yet. One of such open problems is undoubtedly the accurate quantitative calculation of transport characteristics in non-equilibrium conditions and the determination of dynamics with exact treatment of correlations. Therefore, the main goal of this project is to develop and adapt advanced numerical methods based on renormalization group techniques to study transport properties of correlated nanoscale systems, with particular emphasis on non-equilibrium and dynamical phenomena.

**Realization period:** 01.10.2018 - 31.05.2023

# Research team:

**Faculty of Physics, Adam Mickiewicz University, Poznań, Poland**

**Prof. Ireneusz Weymann ** (PI)

Dr. Piotr Trocha,

Dr. Kacper Wrześniewski,

Dr. Piotr Busz,

Dr. Tomasz Ślusarski,

M.Sc. Filip Pawlicki,

M.Sc. Anand Manaparambil,

M.Sc. Patrycja Tulewicz.

# List of publications

Giant tunnel magnetoresistance induced by thermal bias

J. Magn. Magn. Mater.**587**, 171272 (2023)

Nonmonotonic buildup of spin-singlet correlations in a double quantum dot

Phys. Rev. B**108**, 144307 (2023)

Dynamics of Superconducting Correlations Induced by Hopping in Serial Double Quantum Dot System

Acta Phys. Pol. A**143**, 160 (2023)

Nonequilibrium Seebeck effect and thermoelectric efficiency of Kondo-correlated molecular junctions

Phys. Rev. B**107**, 085404 (2023)

Nonequilibrium spintronic transport through Kondo impurities

Phys. Rev. B**106**, 125413 (2022)

Numerical renormalization group study of the Loschmidt echo in Kondo systems

Sci. Rep.**12**, 9799 (2022)

Dynamical quantum phase transitions in a mesoscopic superconducting system

Phys. Rev. B**105**, 094514 (2022)

Spin-polarized transport in quadruple quantum dots attached to ferromagnetic leads

J. Magn. Magn. Mater.**546**, 168835 (2022)

Kondo effect in the presence of the spin accumulation and non-equilibrium spin currents

J. Magn. Magn. Mater.**542**, 168592 (2022)

Spintronic transport through a double quantum dot-based spin valve with noncollinear magnetizations

J. Magn. Magn. Mater.**546**, 168788 (2022)

Kondo Cloud in a Superconductor

Phys. Rev. Lett.**127**, 186804 (2021)

Spin-current Kondo effect: Kondo effect in the presence of spin accumulation

Phys. Rev. B**104**, 125108 (2021)

Large Voltage-Tunable Spin Valve Based on a Double Quantum Dot

Phys. Rev. App.**16**, 014029 (2021)

Transient effects in a double quantum dot sandwiched laterally between superconducting and metallic leads

Phys. Rev. B**103**, 165430 (2021)

Spin Seebeck effect of correlated magnetic molecules

Sci. Rep.**11**, 9192 (2021)

Quench dynamics of a correlated quantum dot sandwiched between normal-metal and superconducting leads

Phys. Rev. B**103**, 155420 (2021)

Magnetization dynamics in a Majorana-wire-quantum-dot setup

Phys. Rev. B**103**, 125413 (2021)

Spectral properties of a Co-decorated quasi-two-dimensional GaSe layer

Phys. Rev. B**102**, 075309 (2020)

Magnetic Kondo regimes in a frustrated half-filled trimer

Phys. Rev. B**102**, 045144 (2020)

Time-dependent spintronic anisotropy in magnetic molecules

Phys. Rev. B**101**, 245434 (2020)

Current cross-correlations and waiting time distributions in Andreev transport through Cooper pair splitters based on a triple quantum dot system

Phys. Rev. B**101**, 155409 (2020)

Detection of Spin Reversal via Kondo Correlation in Hybrid Carbon Nanotube Quantum Dots

ACS Nano**13**, 10029 (2019)

Quench dynamics of spin in quantum dots coupled to spin-polarized leads

Phys. Rev. B**100**, 035404 (2019)

Giant superconducting proximity effect on spintronic anisotropy

Phys. Rev. B**100**, 045401 (2019)

Cross-Correlations in Transport through a Quantum Dot Cooper Pair Splitter Asymmetrically Coupled to Normal Leads

Acta Phys. Pol. A**135**, 1279 (2019)

Magnetoresistive properties of a double magnetic molecule spin valve in different geometrical arrangements

J. Magn. Magn. Mater.**480**, 11 (2019)