Technical Description of the WMI Helium Pump
A vertical cross-section, a horizontal cross-section along the line A-B and a vertical cross-section of part of the pump systems is shown in the
The European Union has awarded €25 million to the SUPREME consortium, consisting of 23 European companies and research organisations, including WMI.
Over the past two decades, the helium price has been strongly increasing. The reason is a growing demand and a change in supply chains. Although helium prices were doubling from 2002 to 2012, both
Luis Flacke was member of the Gross groups as a Master and Ph.D. Student between 2017 and 2021.
Master Thesis: Spin Pumping and Spin Wave Damping in Co25Fe75 Thin Film Heterostructures (2018) Ph.D.
We investigate the spin Hall magnetoresistance (SMR) at room temperature in thin-film heterostructures of antiferromagnetic insulating (0001)-oriented alpha-Fe2O3 (hematite) and Pt. We measure their
The ability to control the Gilbert damping which determines the lifetime of spin information is crucial for designing spintronic and magnonic devices. Thus, controlling the Gilbert damping parameter
Understanding the excitations of quantum materials is essential for unraveling how their microscopic constituents interact. Among these, particle-hole excitations form a particularly important class,
| Christ, P; Biberacher, W; Jansen, AGM; Kartsovnik, MV; Kovalev, AE; Kushch, ND; Steep, E; Andres, K
Nitin Chelwani was member of the Gross group at WMI as a Ph.D. student between June 2011 and December 2016.
Ph.D. Thesis: Scanning Microscopy and Momentum-Resolved Raman Scattering in Semiconductors
Antiferromagnetic materials promise improved performance for spintronic applications as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics
The spin Hall effect in heavy-metal thin films is routinely used to convert charge currents into transverse spin currents and can be used to exert torque on adjacent ferromagnets. Conversely, the
Polarization- and temperature-dependent Raman data along with theoretical simulations are presented for the Kagome ferromagnet Fe3Sn2. Eight out of nine expected phonon modes are identified. The
In easy-plane antiferromagnets, the nature of the elementary excitations of the spin system is captured by the precession of the magnon pseudospin around its equilibrium pseudofield, manifesting
Antiferromagnetic materials promise improved performance for spintronic applications, as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics
We extend the off-diagonal geometric phase [Phys. Rev. Lett. 85, 3067 (2000)] to mixed quantal states. The nodal structure of this phase in the qubit (two-level) case is compared with that of the
Jan Boris Philipp was member of the Gross group at WMI as a Ph.D. student between 2000 and 2003. Ph.D. Thesis: Spinabhängiger Transport in Übergangsmetalloxiden (2003)
In his Ph.D.
Pure spin currents represent the charge-less transport of angular momentum. Our present research is focused on the injection, transport, and detection of magnon-based angular momentum transport in
CRESST is one of the most prominent direct detection experiments for dark matter particles with sub-GeV/c2 mass. One of the advantages of the CRESST experiment is the possibility to include a large
Waveguide QED and light-matter-interactions in low dimensions
Compared to free space, the interaction between light and matter can become considerably more involved when atoms or other emitters are
We present limits on the spin-independent interaction cross section of dark matter particles with silicon nuclei, derived from data taken with a cryogenic calorimeter with 0.35 g target mass operated
CRESST is a leading direct detection sub-GeV dark matter experiment. During its second phase, cryogenic bolometers were used to detect nuclear recoils off the CaWO4 target crystal nuclei. The
| J. Gückelhorn, T. Wimmer, S. Geprägs, H. Huebl, R. Gross, and M. Althammer
| Ahmet Yagmur, Ryo Iguchi, Stephan Gepraegs, Andreas Erb, Shunsuke Daimon, Eiji Saitoh, Rudolf Gross, Ken-ichi Uchida
We investigate the spin Hall magnetoresistance in thin-film bilayer heterostructures of the heavy metal Pt and the antiferromagnetic insulator NiO. While rotating an external magnetic field in the
| W. Prestel, F. Venturini, B. Muschler, I. Tütto, R. Hackl, M. Lambacher, A. Erb, Seiki Komiya, Shimpei Ono, Yoichi Ando, D. Inosov, V.B. Zabolotnyy, and S.V. Borisenko
| Schuler, J; Weiss, S; Bauch, T; Marx, A; Koelle, D; Gross, R
Time-resolved x-ray diffraction has been used to measure the low-temperature thermal transport properties of a Pt/Gd3Fe5O12//Gd3Ga5O12 metal/oxide heterostructure relevant to applications in spin
State tomography allows quantum states to be characterized, and was recently applied to reveal the dynamic magnetization state of a parametrically driven magnet. The identification of nonclassical
Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in the GHz-to-THz frequency range, utilization of
Spin-orbit-torque-driven auto-oscillations in spin Hall nano-oscillators (SHNOs) offer a transformative pathway toward energy-efficient, nanoscale microwave devices for next-generation neuromorphic
| Kathrin Ganzhorn, Tobias Wimmer, Joseph Barker, Gerrit E. W. Bauer, Zhiyong Qiu, Eiji Saitoh, Nynke Vlietstra, Stephan Geprägs, Rudolf Gross, Hans Huebl, Sebastian T.B. Goennenwein
| Lukas Liensberger, Akashdeep Kamra, Hannes Maier-Flaig, Stephan Geprägs, Andreas Erb, Sebastian T. B. Goennenwein, Rudolf Gross, Wolfgang Belzig, Hans Huebl, Mathias Weiler
| Joel Cramer, Er-Jia Guo, Stephan Geprägs, Andreas Kehlberger, Yurii P. Ivanov, Kathrin Ganzhorn, Francesco Della Coletta, Matthias Althammer, Hans Huebl, Rudolf Gross, Jürgen Kosel, Mathias Kläui,
Tobias Wimmer was member of the Gross group at WMI as a aster and Ph.D. student between 2015 and 2021.
Master Thesis: Spin Transport in Magnetic Nanostructures (2016) Ph.D. Thesis: Control and
| H. Maier-Flaig, M. Harder, S. Klingler, Z. Qiu, E. Saitoh, M. Weiler, S. Geprägs, R.Gross, S. T. B. Goennenwein, H. Huebl
Johannes Lotze was member of the Gross group at WMI as a Ph.D. student between April 2011 and April 2015.
Ph.D. Thesis: Spin Pumping in Ferrimagnetic/Normal Metal Bilayers (2015)
In his Ph.D.
| Bo-Wen Dong, Joel Cramer, Kathrin Ganzhorn, H. Y. Yuan, Er-Jia Guo, Sebastian T. B. Goennenwein, and Mathias Kläui
| Marc Ganzhorn and Daniel Josef Egger and Stefan Filipp and Gian R Von Salis and Nikolaj Moll
For applications making use of magnonic spin currents damping effects, which decrease the spin conductivity, have to be minimized. We here investigate the magnon transport in a yttrium iron garnet
The precession of magnon pseudospin about the equilibrium pseudofield, the latter capturing the nature of magnonic eigen-excitations in an antiferromagnet, gives rise to the magnon Hanle effect. Its
The precession of the magnon pseudospin about the equilibrium pseudofield, the latter capturing the nature of magnonic eigenexcitations in an antiferromagnet, gives rise to the magnon Hanle effect.
| B.A. Hermann, C. Rohr, M. Balbás Gambra, A. Malecki, M.S. Malarek, E. Frey, T. Franosch
We analyze the implementation of high-fidelity, phonon-mediated gate operations and quantum simulation schemes for spin qubits associated with silicon vacancy centers in diamond. Specifically, we
We analyze the implementation of high-fidelity, phonon-mediated gate operations and quantum simulation schemes for spin qubits associated with silicon vacancy centers in diamond. Specifically, we
