CO.CO.MAT (2005-2017)
Control of Quantum Correlations in Tailored Matter
SFB/TRR 21 - Stuttgart, Ulm, Tübingen
 © Universität Stuttgart | Impressum

Project A3:
Light-matter states with magnetic molecules (2005-2013)


This project aims to bridge the gap between atomic and solid state physics. We couple the electronic spin of molecular nanomagnets to a strong photon field. Here we use the magnetic moment of molecules as a quantum degree of freedom and couple it to the magnetic field of a planar microwave resonator operating in the GHz range. With appropriate choice of the resonator design and the ensemble of magnetic molecules, we will reach the strong coupling limit and enter the field of cavity quantum electro­dynamics (QED). We couple to the magnetic component of the light field; in contrast to the established approaches to cavity and circuit QED. We combine the universal properties of atoms and molecules with the convenient access of solid-state systems.
Magnetic molecules can form crystals or can be embedded in a solid-state matrix while main­taining their fundamentally molecular properties: the macroscopic magnetic response of such a solid sample can be described as a quantum mechanical ensemble of identical molecules. The coupling to the envir­on­ment is sufficiently weak to preserve quantum coherence up to a microsecond, as shown by our recent experiments. By exploiting large numbers of molecules, we reach the strong-coupling regime which would be inaccessible with a single molecule. The long-term objective of this pioneering project is the creation of hybrid quantum systems and the exploration of quantum control by utilizing nano­magnets. Our experiments address the interaction between the molecules in a solid, and they represent a new approach to observe collective response of molecular magnets.

Project leaders

Prof. Dr. Martin Dressel, 1. Physikalisches Institut, Universität Stuttgart

Dr. Marc Scheffler, 1. Physikalisches Institut, Universität Stuttgart

Prof. Dr. Joris van Slageren, Institut für Physikalische Chemie, Universität Stuttgart

Refs & Publications

D. Kast and J. Ankerhold
"Bipartite entanglement dynamics of two-level systems in sub-Ohmic reservoirs"
Phys. Rev. B 90, 100301(R) (2014); doi: 10.1103/PhysRevB.90.100301

M. M. Felger, M. Dressel, and M. Scheffler
"Microwave resonances in dielectric samples probed in Corbino geometry: Simulation and experiment"
Rev. Sci. Instrum. 84, 114703 (2013); doi: 10.1063/1.4827084

C. Clauss, D. Bothner, D. Koelle, R. Kleiner, L. Bogani, M. Scheffler, and M. Dressel
"Broadband electron spin resonance from 500 MHz to 40 GHz using superconducting coplanar waveguides"
Appl. Phys. Lett. 102, 162601 (2013); doi: 10.1063/1.4802956

M. Scheffler, K. Schlegel, C. Clauss, D. Hafner, C. Fella, M. Dressel, M. Jourdan, J. Sichelschmidt, C. Krellner, C. Geibel, and F. Steglich
"Microwave spectroscopy on heavy-fermion systems: Probing the dynamics of charges and magnetic moments"
Phys. Status Solidi B 250, 439 (2013); doi: 10.1002/pssb.201200925

M. Scheffler, C. Fella, and M. Dressel
"Stripline resonators for cryogenic microwave spectroscopy on metals and superconductors"
J. Phys.: Conf. Ser. 400, 052031 (2012); doi: 10.1088/1742-6596/400/5/052031

E. Heintze, F. El Hallak, C. Clauß, A. Rettori, M. G. Pini, F. Totti, M. Dressel, and L. Bogani
"Dynamic control of magnetic nanowires by light-induced domain-wall kickoffs"
Nature Materials 12, 202 (2013); doi: 10.1038/nmat3498

F. El Hallak, P. Neugebauer, A. L. Barra, J. van Slageren, M. Dressel, and A. Cornia
"Torque-detected ESR of a tetrairon(III) single molecule magnet"
J. Magn. Reson. 223, 55-60 (2012); doi: 10.1016/j.jmr.2012.08.008

D. Bothner, C. Clauss, E. Koroknay, M. Kemmler, T. Gaber, M. Jetter, M. Scheffler, P. Michler, M. Dressel, D. Kölle, and R. Kleiner
"The phase boundary of superconducting niobium thin films with antidot arrays fabricated with microsphere photolithography"
Supercond. Sci. Technol. 25, 065020 (2012); doi: 10.1088/0953-2048/25/6/065020

K. Steinberg, M. Scheffler, and M. Dressel
"Broadband microwave spectroscopy in Corbino geometry at 3He temperatures"
Rev. Sci. Instrum 83, 024704 (2012); doi: 10.1063/1.3680576

D. Bothner, C. Clauss, E. Koroknay, M. Kemmler, T. Gaber, M. Jetter, M. Scheffler, P. Michler, M. Dressel, D. Kölle, and R. Kleiner
"Reducing vortex losses in superconducting microwave resonators with microsphere patterned antidot arrays"
Appl. Phys. Lett. 100, 012601 (2012); doi: 10.1063/1.3673869

F. El Hallak, P. Rosa, P. Vidal, I. Sheikin, M. Dressel, and J. van Slageren
"Giant magnetisation step in Fe2: Molecular nanomagnets in the weak exchange limit"
EPL 95, 57002 (2011); doi: 10.1209/0295-5075/95/57002

C. Schlegel, J. van Slageren, G. Timco, R. E. P. Winpenny, and M. Dressel
"Origin of superhyperfine interactions in the antiferromagnetic ring Cr7Ni"
Phys. Rev. B 83, 134407 (2011); doi: 10.1103/PhysRevB.83.134407

K. Steinberg, M. Scheffler, and M. Dressel
"Microwave inductance of thin metal strips"
J. Appl. Phys. 108, 096102 (2010); doi: 10.1063/1.3505706

F. El Hallak, J. van Slageren, and M. Dressel
"Torque detected broad band electron spin resonance"
Rev. Sci. Instrum. 81, 095105 (2010); doi: 10.1063/1.3482158

C. Schlegel, M. Dressel, and J. van Slageren
"Broadband electron spin resonance at 4-40 GHz and magnetic fields up to 10 T"
Rev. Sci. Instrum. 81, 093901 (2010); doi: 10.1063/1.3469783

O. Pieper, T. Guidi, S. Caretta, J. van Slageren, F. El Hallak, B. Lake, P. Santini, G. Amoretti, H. Mutka, M. Koza, M. Russina, A. Schnegg, C.J. Milios, E.K. Brechin, A. Julià, and J. Tejada
"Inelastic neutron scattering and frequency-domain magnetic resonance studies of S=4 and S=12 Mn6 single molecule magnets"
Phys. Rev. B 81, 174420 (2010); doi: 10.1103/PhysRevB.81.174420

J. van Slageren, S. Piligkos, and F. Neese
"Magnetic circular dichroism spectroscopy on the Cr8 antiferromagnetic ring"
Dalton Trans. 39, 4999 (2010); doi: 10.1039/b925028j

C. Carbonera, F. Luis, J. Campo, J. Sanchez-Marcos, A. Camon, J. Chaboy, D. Ruiz-Molina, I. Imaz, J. van Slageren, S. Dengler, and M. Gonzalez
"Effect of crystalline disorder on quantum tunneling in the single-molecule magnet Mn12 benzonate"
Phys. Rev. B 81, 014427 (2010); doi: 10.1103/PhysRevB.81.014427

P. Nägele and U. Weiss
"Dynamics of coupled spins in the white- and quantum-noise regime"
Physica E 42, 622 (2010); doi: 10.1016/j.physe.2009.06.060

G. Campagnano, A. Hamma, and U. Weiss
"Entanglement dynamics of coupled qubits and a semi-decoherence free subspace"
Phys. Lett. A 374, 416–423 (2010); doi: 10.1016/j.physleta.2009.10.0

T. J. Mooibroek, G. Aromí, M. Quesada, O. Roubeau, P. Gamez, S. DeBeer George, J. van Slageren, S. Yasin, E. Ruiz, and J. Reedijk
"A Mixed-Valent Pentanuclear Cu(II) (4)Cu(I) Compound Containing a Radical-Anion Ligand"
Inorg. Chem. 48, 10643 (2009); doi: 10.1021/ic901337r

S. Carretta, T. Guidi, P. Santini, G. Amoretti, O. Pieper, B. Lake, J. van Slageren, F. El Hallak, W. Wernsdorfer, H. Mutka, M. Russina, C.J. Milios, and E.K. Brechin
"Neutron spectroscopy and magnetic relaxation of the Mn6 nanomagnets"
Polyhedron 28, 1940–1944 (2009); doi: 10.1016/j.poly.2008.11.009

C. Schlegel, J. van Slageren, A. Manoli, E. K. Brechin, and M. Dressel
"Synthesis, structures and magnetic properties of two novel tetranuclear iron(III) single-molecule magnets: Enhanced energy barriers in solution"
Polyhedron 28, 1834 (2009); doi: 10.1016/j.poly.2009.01.030

J. van Slageren, S. Vongtragool, B. Gorshunov, A. Mukhin, and M. Dressel
"Frequency-domain magnetic-resonance spectroscopic investigations of the magnetization dynamics in Mn12Ac single crystals"
Phys. Rev. B 79, 224406 (2009); doi: 10.1103/PhysRevB.79.224406

J. van Slageren, C. Schlegel, and M. Dressel
"Bausteine für Quantencomputer"
Nachrichten aus der Chemie 57, 124 (2009); doi: 10.1002/nadc.200962595

P. Nägele, G. Campagnano, and U. Weiss
"Dynamics of dissipative coupled spins: decoherence, relaxation and effects of a spin-boson bath"
New Journal of Physics 10, 115010 (2008)

C. Schlegel, J. van Slageren, M. Manoli, E. K. Brechin, and M. Dressel
"Direct Observation of Quantum Coherence in Single-Molecule Magnets"
Phys. Rev. Lett. 101, 147203 (2008)

N. Kirchner, J. van Slageren, B. Tsukerblat, O. Waldmann, and M. Dressel
"Antisymmetric exchange interactions in Ni4 clusters"
Phys. Rev. B 78, 094426 (2008)

J. van Slageren, S. Dengler, J. Gómez-Segura, D. Ruiz-Molina, and M. Dressel
"Magnetism and Magnetic Resonance Studies of Single Molecule Magnets in Polymer Matrices"
Inorganica Chimica Acta 361, 3714 (2008)

K. Steinberg, M. Scheffler, and M. Dressel
"Quasiparticle response of superconducting aluminum to electromagnetic radiation"
Phys. Rev. B 77, 214517 (2008)

A. Herzog and U. Weiss
"Current statistics of correlated charge tunnelling through an impurity in a 1D wire"
New J. Phys. 10, 045008 (2008); doi: 10.1088/1367-2630/10/4/045008

S. Caretta, T. Guidi, P. Santini, G. Amoretti, O. Pieper, B. Lake, J. van Slageren, F. El Hallak, W. Wernsdorfer, H. Mutka, M. Russina, C.J. Milios, and E.K. Brechin
"Breakdown of the Giant Spin Model in the Magnetic Relaxation of the Mn6 Nanomagnets"
Phys. Rev. Lett. 100, 157203 (2008)

U. Weiss
"Quantum Dissipative Systems"
Series in Modern Condensed Matter Physics, Vol. 13, third enlarged edition, 506 p. (World Scientific, Singapore, 2008)

A. Komnik, B. Trauzettel, and U. Weiss
"Statistics of charge transfer through impurities in strongly correlated 1D metals"
Ann. Phys. 16, 661 (2007)

F. El Hallak, J. van Slageren, J. Gómez-Segura, D. Ruiz-Molina, and M. Dressel
"High-frequency ESR and frequency domain magnetic resonance spectroscopic studies of single molecule magnets in frozen solution"
Phys. Rev. B 75, 104403 (2007)

N. Kirchner, J. van Slageren, E.K. Brechin, and M. Dressel
"Frequency domain magnetic resonance spectroscopy on [Mn12]- and [Mn9]: Zero-field splittings and lineshape analysis"
Polyhedron 24, 2400 - 2404 (2005)