Wolfgang Wernsdorfer
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View article: A Spin Frustrated Hourglass <b>{Gd</b> <sub> <b>9</b> </sub> <b>}</b> Molecular Nanomagnet with Unusual Magnetocaloric Properties
A Spin Frustrated Hourglass <b>{Gd</b> <sub> <b>9</b> </sub> <b>}</b> Molecular Nanomagnet with Unusual Magnetocaloric Properties Open
We report a highly symmetric {Gd9} molecular nanocage with the formula [Gd9(BA)16(OH)10]Cl·3(C2H5OH)·4(H2O), which crystallizes in the cubic …
View article: Chiral Dysprosium-[7]Helicene Macrocycles Showing Record Single-Molecule Magnet Properties in the Lanthanide–Helicene Family
Chiral Dysprosium-[7]Helicene Macrocycles Showing Record Single-Molecule Magnet Properties in the Lanthanide–Helicene Family Open
Chiral helicene-based metal complexes have emerged as an extremely promising class of multifunctional molecules for a wide range of applications. Despite significant progress in the synthesis of helicene-based transition-metal complexes in…
View article: CCDC 2424695: Experimental Crystal Structure Determination
CCDC 2424695: Experimental Crystal Structure Determination Open
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available …
View article: Spin environment of a superconducting qubit in high magnetic fields
Spin environment of a superconducting qubit in high magnetic fields Open
View article: Quantum Coherence in Superconducting Vortex States
Quantum Coherence in Superconducting Vortex States Open
Abrikosov vortices, where the superconducting gap is completely suppressed in the core, are dissipative, semi-classical entities that impact applications from high-current-density wires to superconducting quantum devices. In contrast, we p…
View article: Hybrid Quantum Systems: Coupling Single-Molecule Magnet Qudits with Industrial Silicon Spin Qubits
Hybrid Quantum Systems: Coupling Single-Molecule Magnet Qudits with Industrial Silicon Spin Qubits Open
Molecular spin qudits offer an attractive platform for quantum memory, combining long coherence times with rich multi-level spin structures. Terbium bis(phthalocyaninato) (TbPc$_2$) exemplifies such systems, with demonstrated quantum contr…
View article: Spin Environment of a Superconducting Qubit in High Magnetic Fields
Spin Environment of a Superconducting Qubit in High Magnetic Fields Open
Data, Python notebooks and figures associated with the paper "Spin Environment of a Superconducting Qubit in High Magnetic Fields" by S. Günzler & J. Beck et al. at Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany. The data is s…
View article: Offset Charge Dependence of Measurement-Induced Transitions in Transmons
Offset Charge Dependence of Measurement-Induced Transitions in Transmons Open
A key challenge in achieving scalable fault tolerance in superconducting quantum processors is readout fidelity, which lags behind one- and two-qubit gate fidelity. A major limitation in improving qubit readout is measurement-induced trans…
View article: An electrically controlled single-molecule spin switch
An electrically controlled single-molecule spin switch Open
Precise control of spin states and spin-spin interactions in atomic-scale magnetic structures is crucial for spin-based quantum technologies. A promising architecture is molecular spin systems, which offer chemical tunability and scalabili…
View article: Giant Molecular Toroidal Moment Amenable to Direct Observation in a Fe$_{10}$Dy$_{10}$ Ring
Giant Molecular Toroidal Moment Amenable to Direct Observation in a Fe$_{10}$Dy$_{10}$ Ring Open
In single molecule toroics (SMTs) atomic spins and orbital currents generate magnetic vortices known as toroidal moments $\boldsymbolτ$, endowed with both magnetic and electric dipole symmetries, which can enable spin control via magnetoel…
View article: Kinetic inductance coupling for circuit QED with spins
Kinetic inductance coupling for circuit QED with spins Open
While transverse coupling (σx) is commonly used in qubit-resonator systems, longitudinal coupling via σz presents a tantalizing alternative: it does not hybridize the modes, eliminating Purcell decay, and it enables quantum-nondemolition q…
View article: Adding Time-Domain 161Dy Mössbauer to the Mix: a Multitechnique Investigation of Magnetic Transitions in a {CoIII3DyIII3} Cluster with a Toroidal Moment
Adding Time-Domain 161Dy Mössbauer to the Mix: a Multitechnique Investigation of Magnetic Transitions in a {CoIII3DyIII3} Cluster with a Toroidal Moment Open
The coordination cluster [CoIII3DyIII3(µ3-OH)4(O2C-C6H4-p-Me)6(pmide)3(H2O)3]Cl2∙10Me…
View article: Roadmap on atomically-engineered quantum platforms
Roadmap on atomically-engineered quantum platforms Open
Matter at the atomic-scale is inherently governed by the laws of quantum mechanics. This makes charges and spins confined to individual atoms—and interactions among them—an invaluable resource for fundamental research and quantum technolog…
View article: Deciphering the Magnetostructural Criteria in Dy<sup>III</sup> and Ho<sup>III</sup> Macrocycle-Based Single-Molecule Magnets with Pseudo-<i>D</i><sub>5h</sub> Symmetry: A Combined Single-Crystal Hysteresis and Theoretical Study
Deciphering the Magnetostructural Criteria in Dy<sup>III</sup> and Ho<sup>III</sup> Macrocycle-Based Single-Molecule Magnets with Pseudo-<i>D</i><sub>5h</sub> Symmetry: A Combined Single-Crystal Hysteresis and Theoretical Study Open
The employment of the metal-ion-assisted [1+1] Schiff-base condensation has led to complexes [Ln(LN5)(Ph3SiO)2](PF6), where LnIII = DyIII (1-Dy) and HoIII …
View article: Quantum spin-engineering in on-surface molecular ferrimagnets
Quantum spin-engineering in on-surface molecular ferrimagnets Open
View article: Observation of Perfect Absorption in Hyperfine Levels of Molecular Spins with Hermitian Subspaces
Observation of Perfect Absorption in Hyperfine Levels of Molecular Spins with Hermitian Subspaces Open
We investigate Perfect Absorption (PA) of radiation, in which incoming energy is entirely dissipated, in a system consisting of molecular spin centers coherently coupled to a planar microwave resonator operated at milliKelvin temperature a…
View article: The Interplay of Single Ion Anisotropy and Magnetic 3 <i>d</i>‐4 <i>f</i> Interactions in V<sup>III</sup><sub>2</sub>Ln<sup>III</sup><sub>2</sub> Butterfly Complexes
The Interplay of Single Ion Anisotropy and Magnetic 3 <i>d</i>‐4 <i>f</i> Interactions in V<sup>III</sup><sub>2</sub>Ln<sup>III</sup><sub>2</sub> Butterfly Complexes Open
Within the framework of 3 d –4 f molecular magnets, the most thoroughly investigated architecture is that of butterfly‐shaped coordination clusters as it provides an ideal testbed to study fundamental magnetic interactions. Here, we report…
View article: Industrial 300 mm wafer processed spin qubits in natural silicon/silicon-germanium
Industrial 300 mm wafer processed spin qubits in natural silicon/silicon-germanium Open
The realisation of a universal quantum computer will require the operation of many thousands to millions of coherently coupled qubits. The possibility of using existing industrial semiconductor fabrication techniques and infrastructure for…
View article: Electronic structure of mononuclear and radical-bridged dinuclear cobalt(II) single-molecule magnets
Electronic structure of mononuclear and radical-bridged dinuclear cobalt(II) single-molecule magnets Open
View article: Low crosstalk modular flip-chip architecture for coupled superconducting qubits
Low crosstalk modular flip-chip architecture for coupled superconducting qubits Open
We present a flip-chip architecture for an array of coupled superconducting qubits, in which circuit components reside inside individual microwave enclosures. In contrast to other flip-chip approaches, the qubit chips in our architecture a…
View article: Kinetic inductance coupling for circuit QED with spins
Kinetic inductance coupling for circuit QED with spins Open
In contrast to the commonly used qubit resonator transverse coupling via the $σ_{xy}$-degree of freedom, longitudinal coupling through $σ_z$ presents a tantalizing alternative: it does not hybridize the modes, eliminating Purcell decay, an…
View article: Quantum Spin-Engineering in On-Surface Molecular Ferrimagnets
Quantum Spin-Engineering in On-Surface Molecular Ferrimagnets Open
The design and control of atomic-scale spin structures constitute major challenges for spin-based quantum technology platforms, including quantum dots, color centers, and molecular spins. Here, we showcase a strategy for designing the quan…
View article: Isolation of a planar π-aromatic Bi5− ring in a cobalt-based inverse-sandwich-type complex
Isolation of a planar π-aromatic Bi5− ring in a cobalt-based inverse-sandwich-type complex Open
Monocyclic π-aromatic compounds are ubiquitous throughout almost all fields of natural sciences—as synthons in industrial processes, as ligands of metal complexes for catalysis or sensing and as bioactive molecules. Planar organocycles sta…
View article: Thermalization of a flexible microwave stripline measured by a superconducting qubit
Thermalization of a flexible microwave stripline measured by a superconducting qubit Open
With the demand for scalable cryogenic microwave circuitry continuously rising, recently developed flexible microwave striplines offer the tantalizing perspective of increasing the cabling density by an order of magnitude without thermally…
View article: Unveiling the Werner-Type Cluster Chemistry of Heterometallic 4f/Post-Transition Metals: A {Dy<sub>3</sub>Bi<sub>8</sub>} Complex Exhibiting Quantum Tunneling Steps in the Hysteresis Loops and its 1-D Congener
Unveiling the Werner-Type Cluster Chemistry of Heterometallic 4f/Post-Transition Metals: A {Dy<sub>3</sub>Bi<sub>8</sub>} Complex Exhibiting Quantum Tunneling Steps in the Hysteresis Loops and its 1-D Congener Open
A new [Dy3Bi8O6Cl3(saph)9] (1) Werner-type cluster has been prepared, which is the first DyIII/BiIII polynuclear compound with no metal-metal bond and one …
View article: Probing Magnetism in Self-Assembled Organometallic Complexes using Kondo Spectroscopy
Probing Magnetism in Self-Assembled Organometallic Complexes using Kondo Spectroscopy Open
Control of individual spins at the atomic level holds great promise for miniaturized spintronics, quantum sensing, and quantum information processing. Both single atomic and molecular spin centers are prime candidates for these application…
View article: From strong to weak interaction: reconciling SQUID and μSQUID-EPR data in anomalous Co( <scp>ii</scp> ) dimers
From strong to weak interaction: reconciling SQUID and μSQUID-EPR data in anomalous Co( <span>ii</span> ) dimers Open
Sub-Kelvin μSQUID-EPR reveals unexpected spin interactions in Co( ii ) dimers, complementing conventional magnetic studies.
View article: Discriminating ferrotoroidic from antiferrotoroidic ground states using a 3d quantum spin sensor
Discriminating ferrotoroidic from antiferrotoroidic ground states using a 3d quantum spin sensor Open
View article: Industrial 300mm wafer processed spin qubits in natural silicon/silicon-germanium
Industrial 300mm wafer processed spin qubits in natural silicon/silicon-germanium Open
The realisation of an universal quantum computer will require the operation of thousands to millions of qubits. The possibility of using existing industrial semiconductor fabrication techniques and infrastructure for up-scaling and reprodu…
View article: A Nanosized {Ni<sup>II</sup><sub>18</sub>} Cluster with a ‘Flying Saucer’ Topology Exhibiting Slow Relaxation of Magnetisation Phenomena at Both 15 K and 1.3 K
A Nanosized {Ni<sup>II</sup><sub>18</sub>} Cluster with a ‘Flying Saucer’ Topology Exhibiting Slow Relaxation of Magnetisation Phenomena at Both 15 K and 1.3 K Open
A high‐nuclearity {Ni 18 } complex ( 1 ) with a unique ‘flying saucer’ motif has been prepared from the organic chelate, α‐methyl‐2‐pyridine‐methanol (mpmH), in conjunction with bridging azido (N 3 − ) and peroxido (O 2 2− ) ligands. Magne…