Quantum dynamics and magnetoeletric coupling in molecular materials
ORAL · Invited
Abstract
Materials with magnetoelectric (ME) coupling exhibit behavior wherein applied electric field controls the magnetization or applied magnetic field controls the electric polarization. These have many potential and realized applications including electric control of spin qubits or coupling between qubits in molecular magnets for sensing or computing. I will review our progress in coupling electric fields to the overall spin state S of spin crossover materials, and to the spin projection Sz in materials with cascades of field-induced level crossings. Such ME coupling can originate from the symmetry-breaking of a cluster of spins that allows spatial inversion symmetry breaking, or else from the coupling of the magnetic Hamiltonian to the lattice of a polar crystal. In the process of conducting such magnetic and electric measurements in high fields we have also uncovered quantum dynamic behavior in the pulsed field magnetization of molecular magnets. We will compare our data on an antiferromagnetic molecule to Landau-Zener models.
*The scientific work was primarily funded by the Center for Molecular Magnetic Quantum Materials (M2QM), an Energy Frontier Research Center (EFRC) funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences under Award DE-SC0019330. The high-field facility was provided by the National High Magnetic Field Laboratory, supported by National Science Foundation and the U.S. Department of Energy Cooperative Agreement Nos. DMR-1644779 and DMR-2128556 and the State of Florida. A portion of this work is also funded by the LANL LDRD program. The calculations employed resources of the University of Florida Research Computing as well as the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility using NERSC award BES-ERCAP0032450. This project also used resources provided by the X-ray Crystallography Center (FSU075000XRAY) at the Department of Chemistry and Biochemistry, Florida State University.
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Presenters
Vivien Zapf
Los Alamos National Laboratory (LANL)
Authors
Vivien Zapf
Los Alamos National Laboratory (LANL)
Shuanglong Liu
Northeastern University
Minseong Lee
National High Magnetic Field Laboratory
High Magnetic Field Laboratory, Los Alamos National Laboratory
James Wampler
Los Alamos National Laboratory (LANL)
Shengzhi Zhang
Los Alamos National Laboratory (LANL)
Magdalena Teresa Owczarek
Los Alamos National Laboratory (LANL)
Dibya Mondal
Florida State University
Ping Wang
Florida State University (former)
Miguel Teruya
Florida State University
Priscila FS Rosa
Los Alamos National Laboratory (LANL)
Daphne Lubert-Perquel
Florida State University
Stephen Hill
Florida State University
Michael Shatruk
Florida State University
Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306
