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This article describes a mean-field theoretical model for Spin-Crossover (SCO) materials and explores its implications. It is based on a simple Hamiltonian that yields the high spin molar fraction as a function of temperature and pressure,…

Materials Science · Physics 2023-04-12 Mario Reis , Yongqiang Cheng , Antonio M. dos Santos

Single metallocene molecules act as sensitive spin detectors when decorating the probe of a scanning tunneling microscope (STM). However, the impact of the atomic-scale electrode details on the molecular spin state has remained elusive to…

Mesoscale and Nanoscale Physics · Physics 2024-10-11 Maximilian Kögler , Nicolas Néel , Laurent Limot , Jörg Kröger

We consider electrical transport through molecules with Heisenberg-coupled spins arranged in a ring structure in the presence of an easy-axis anisotropy. The molecules are coupled to two metallic leads and a gate. In the charged state of…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Jörg Lehmann , Daniel Loss

The ability to control the conductance of single molecules will have a major impact in nanoscale electronics. Azobenzene, a molecule that changes conformation as a result of a trans/cis transition when exposed to radiation, could form the…

Mesoscale and Nanoscale Physics · Physics 2008-11-26 Miriam del Valle , Rafael Gutierrez , Carlos Tejedor , Gianaurelio Cuniberti

The pressure-dependent evolution of the spin crossover (SCO) transition has garnered significant interest due to its connection to the giant barocaloric effect (BCE) near room temperature. Pressure alters both the molecular and solid-state…

Materials Science · Physics 2025-10-09 S. Vela , J. Ribas-Ariño , S. P. Vallone , A. M. dos Santos , M. A. Halcrow , K. G. Sandeman

In this paper we investigate the spin-resolved thermoelectric properties of strongly correlated molecular junctions in the linear response regime. The magnetic molecule is modeled by a single orbital level to which the molecular core spin…

Mesoscale and Nanoscale Physics · Physics 2021-05-25 Anand Manaparambil , Ireneusz Weymann

We investigated domain growth in switching processes between the low-spin and high-spin phases in thermally induced hysteresis loops of spin-crossover (SC) solids. Elastic interactions among the molecules induce effective long-range…

We argue that recent neutron scattering measurements by Lake et. al. (Science 291, 1759 (2001)) of the spin excitation spectrum of LSCO in a magnetic field can be understood in terms of proximity to a phase with co-existing…

Superconductivity · Physics 2009-11-07 Eugene Demler , Subir Sachdev , Ying Zhang

Spintronics is the ability of injecting, manipulating and detecting electron spins into solid state systems. Molecular-electronics investigates the possibility of making electronic devices using organic molecules. Traditionally these two…

Materials Science · Physics 2007-05-23 Stefano Sanvito , Alexandre Reily Rocha

Trends of miniaturized devices and quantum interference electronics lead to the long desire of Fano interference in single-molecule junctions, here, which is successfully demonstrated using the 2,7-di(4-pyridyl)-9,9'-spirobifluorene…

Metallorganic molecules have been proposed as excellent spin filters in molecular spintronics because of the large spin-polarization of their electronic structure. However, most of the studies involving spin transport, have disregarded…

Mesoscale and Nanoscale Physics · Physics 2015-04-29 P. N. Abufager , R. Robles , N. Lorente

We present a new mechanism for a spin blockade effect associated with a change in the type of magnetic anisotropy over oxidation state in a single molecule transistor, by taking an example of an individual Eu$_{2}$(C$_{8}$H$_{8}$)$_{3}$…

Mesoscale and Nanoscale Physics · Physics 2016-11-23 Guangpu Luo , Kyungwha Park

Molecular spintronics hinges on the detailed understanding of electronic and magnetic properties of molecules interfaced with various materials. Here we demonstrate with ab-initio simulations that the prototypical Co-phthalocyanine (CoPc)…

Mesoscale and Nanoscale Physics · Physics 2021-05-26 Ana M. Montero , Filipe S. M. Guimarães , Samir Lounis

We study the influence of moderate exchange interactions of electrons on the behavior of the peaks in the conductance of single electron transistors. We numerically reproduce recently observed features of both the peak positions and the…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Ilya L . Kurland , Richard Berkovits , Boris L. Altshuler

We investigate the electron transport properties of a model magnetic molecule formed by two magnetic centers whose exchange coupling can be altered with a longitudinal electric field. In general we find a negative differential conductance…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Sujeet K. Shukla , Stefano Sanvito

Spin-orbit coupling (SOC) in solids normally originates from the electron motion in the electric field of the crystal. It is key to understanding a variety of spin-transport and topological phenomena, such as Majorana fermions and recently…

Quantum Gases · Physics 2014-11-18 Sergey V. Syzranov , Michael L. Wall , Victor Gurarie , Ana Maria Rey

We review different electron transport methods to probe the magnetic properties, such as the magnetic anisotropy, of an individual Fe4 SMM. The different approaches comprise first and higher order transport through the molecule. Gate…

Mesoscale and Nanoscale Physics · Physics 2016-06-09 E. Burzurí , R. Gaudenzi , H. S. J. van der Zant

We propose cotunneling as the microscopic mechanism that makes possible inelastic electron spectroscopy of magnetic atoms in surfaces for a wide range of systems, including single magnetic adatoms, molecules and molecular stacks. We…

Mesoscale and Nanoscale Physics · Physics 2011-08-26 F. Delgado , J. Fernández-Rossier

The quantum mechanical screening of a spin via conduction electrons depends sensitively on the environment seen by the magnetic impurity. A high degree of responsiveness can be obtained with metal complexes, as the embedding of a metal ion…

Strongly Correlated Electrons · Physics 2018-11-29 Jens Kügel , Michael Karolak , Andreas Krönlein , David Serrate , Matthias Bode , Giorgio Sangiovanni

We report on the observation of Kondo and split Kondo peaks in single-molecule transistors containing a single spin transition molecule with a Fe2+ ion. Coulomb blockade characteristics reveal a double quantum dot behavior in a parallel…

Mesoscale and Nanoscale Physics · Physics 2010-04-27 A. Bernand-Mantel , J. S. Seldenthuis , A. Beukman , H. S. J. van der Zant , V. Meded , R. Chandrasekhar , K. Fink , M. Ruben , F. Evers
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