R. Klingeler
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View article: Anomalous Pressure Dependence of the Charge Density Wave and Fermi Surface Reconstruction in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi>BaFe</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>2</mml:mn> </mml:mrow> </mml:msub> </mml:mrow> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi>Al</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>9</mml:mn> </mml:mrow> </mml:msub> </mml:mrow> </mml:math>
Anomalous Pressure Dependence of the Charge Density Wave and Fermi Surface Reconstruction in Open
We investigate the pressure evolution of charge density wave (CDW) order in the intermetallic compound BaFe 2 Al 9 , which undergoes a pronounced first-order CDW transition ∼ 1 1 2 K at ambient pressure. High-pressure e…
View article: Partially Manganese-Substituted Li-Rich Antiperovskite (Li<sub>2</sub>Fe)SeO Cathode for Li-Ion Batteries
Partially Manganese-Substituted Li-Rich Antiperovskite (Li<sub>2</sub>Fe)SeO Cathode for Li-Ion Batteries Open
Lithium-rich antiperovskites are promising high-capacity cathode materials for next-generation Li-ion batteries. In this study, partially Mn-substituted (Li2Fe1-y Mn y )-SeO (y = 0.1-0.4) cathode materials were synthesized via solid-state …
View article: Towards Understanding Prolate 4$f$ Monomers: Numerical Predictions and Experimental Validation of Electronic Properties and Slow Relaxation in a Muffin-shaped Er$^\mathrm{III}$ Complex
Towards Understanding Prolate 4$f$ Monomers: Numerical Predictions and Experimental Validation of Electronic Properties and Slow Relaxation in a Muffin-shaped Er$^\mathrm{III}$ Complex Open
We report the synthesis, crystal structure and magnetic properties of the triply-capped, slightly distorted trigonal-prismatic complex [Er(PPTMP)$_2$(H$_2$O)][OTf]$_3$ (PPTMP = (4-(6-(1,10-phenanthrolin-2-yl)pyridin-2-yl)-1H-1,2,3-triazol-…
View article: Elucidating the origin of long-range ferromagnetic order in Fe$_3$GeTe$_2$ by low-energy magnon excitation studies
Elucidating the origin of long-range ferromagnetic order in Fe$_3$GeTe$_2$ by low-energy magnon excitation studies Open
We report a detailed high-field/high-frequency ferromagnetic resonance (HF-FMR) study of low-energy magnon excitations in the van der Waals ferromagnet Fe$_3$GeTe$_2$. At 2 K, the field dependence of the magnon branches is well described b…
View article: Anomalous Charge Density Wave and Fermi Surface Reconstruction in Pressurized BaFe2Al9
Anomalous Charge Density Wave and Fermi Surface Reconstruction in Pressurized BaFe2Al9 Open
The intermetallic compound BaFe2Al9 exhibits unusual physical properties associated with a charge density wave (CDW) transition. Unlike conventional CDW materials, which typically display subtle structural distortions or lattice modulation…
View article: Competing Interactions and the Effects of Uniaxial Out-of-plane Perturbations in the Honeycomb Antiferromagnet Na$_2$Co$_2$TeO$_6$
Competing Interactions and the Effects of Uniaxial Out-of-plane Perturbations in the Honeycomb Antiferromagnet Na$_2$Co$_2$TeO$_6$ Open
Despite exhibiting magnetic long-range order below $T_\mathrm{N} = 26.7\,\mathrm{K}$, the honeycomb cobaltate Na$_2$Co$_2$TeO$_6$ is predicted to enter a Kitaev spin liquid state when subjected to small external perturbations. While most o…
View article: Magnetic and thermodynamic studies on the distorted kagome magnet Pr$_3$BWO$_9$
Magnetic and thermodynamic studies on the distorted kagome magnet Pr$_3$BWO$_9$ Open
We report specific heat, ac/dc magnetic susceptibility as well as static and pulsed field magnetization studies on the distorted kagome magnet Pr$_3$BWO$_9$ down to 0.4~K and up to high magnetic fields. The low-temperature thermodynamic pr…
View article: The Relevance of Non‐Axiality and Low‐Lying Excited States for Slow Magnetic Relaxation in Pentagonal‐Bipyramidal Erbium(III) Complexes Probed by High‐frequency EPR
The Relevance of Non‐Axiality and Low‐Lying Excited States for Slow Magnetic Relaxation in Pentagonal‐Bipyramidal Erbium(III) Complexes Probed by High‐frequency EPR Open
High‐frequency/high‐field electron paramagnetic resonance studies on a series of seven‐coordinate pentagonal‐bipyramidal (PBP) erbium(III) complexes Er(DAPMBH/H 2 DAPS)X (H 2 DAPMBH = 2,6‐diacetylpyridine bis‐4‐methoxy benzoylhydrazone, H …
View article: Magnetic order and Li-diffusion in the 1/3-filled Kagome layers of antiperovskite Lithium-ion battery materials (Li$_2$Fe)SO and (Li$_2$Fe)SeO
Magnetic order and Li-diffusion in the 1/3-filled Kagome layers of antiperovskite Lithium-ion battery materials (Li$_2$Fe)SO and (Li$_2$Fe)SeO Open
The recently discovered lithium-rich antiperovskites (Li$_2$Fe)SeO and (Li$_2$Fe)SO host lithium and iron ions on the same atomic position which octahedrally coordinates to central oxygens. In a cubic antiperovskite these sites form Kagome…
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: Pressure-Tuned Magnetism and Bandgap Modulation in Layered Fe-Doped CrCl3
Pressure-Tuned Magnetism and Bandgap Modulation in Layered Fe-Doped CrCl3 Open
We explore the structural, magnetic, vibrational and optical band gap properties under varying pressures. By integrating first-principles calculations with experimental techniques, including Raman spectroscopy, photoluminescence (PL), unia…
View article: Separating cationic and anionic redox activity in antiperovskite Li$_2$Fe)SO
Separating cationic and anionic redox activity in antiperovskite Li$_2$Fe)SO Open
Lithium-rich antiperovskite promise to be a compelling high-capacity cathode material due to existence of both cationic and anionic redox activity. Little is however known about the effect of separating the electrochemical cationic from th…
View article: Slow Spin Relaxation and Low-Temperature Spin Freezing in Disordered Fluorite Ho$_2$Zr$_2$O$_7$
Slow Spin Relaxation and Low-Temperature Spin Freezing in Disordered Fluorite Ho$_2$Zr$_2$O$_7$ Open
We report on the origin of spin freezing in the disordered fluorite Ho$_2$Zr$_2$O$_7$. The system is investigated by low-temperature heat capacity as well as by DC and AC magnetization. While the system does not show a long-range magnetic …
View article: Magnetic properties and field-induced phenomena in the Jeff = 1/2 distorted kagome antiferromagnet
Magnetic properties and field-induced phenomena in the Jeff = 1/2 distorted kagome antiferromagnet Open
The intertwining between competing degrees of freedom, anisotropy, and frustration-induced quantum fluctuations offers an ideal ground to realize exotic quantum phenomena in the rare-earth-based kagome lattice. The magnetic susceptibility …
View article: Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS<sub>3</sub>
Optical Probe of Magnetic Ordering Structure and Spin‐Entangled Excitons in Mn‐Substituted NiPS<sub>3</sub> Open
In van der Waals magnets, the interplay between magneto‐excitonic coupling and optical phenomena opens avenues for directly probing magnetic ordering structures, manipulating excitonic properties through magnetic fields, and exploring quan…
View article: Motional Narrowing Effects in the Excited State Spin Populations of Mn-Doped Hybrid Perovskites
Motional Narrowing Effects in the Excited State Spin Populations of Mn-Doped Hybrid Perovskites Open
Spin-orbit coupling in the electronic states of solution-processed hybrid metal halide perovskites forms complex spin-textures in the band structures and allows for optical manipulation of the excited state spin-polarizations. Here, we rep…
View article: Redox-active, photoluminescent porous polymers based on spirofluorene-bridged <i>N</i>-heterotriangulenes and their feasibility as organic cathode materials
Redox-active, photoluminescent porous polymers based on spirofluorene-bridged <i>N</i>-heterotriangulenes and their feasibility as organic cathode materials Open
Redox-active microporous polymers were fabricated from functionalized spirofluorene-bridged N -heterotriangulenes. The polymers exhibited a capacity of 26 mA h g −1 with 80% capacity retention over 400 cycles when applied as cathode materi…
View article: Magnetic phase diagram and magneto-elastic coupling of NdB$_4$ studied by high-resolution capacitance dilatometry up to 35~T
Magnetic phase diagram and magneto-elastic coupling of NdB$_4$ studied by high-resolution capacitance dilatometry up to 35~T Open
We report high-resolution dilatometry studies on single crystals of the Shastry-Sutherland-lattice magnet NdB$_4$ supported by specific heat and magnetometry data. Our dilatometric studies evidence pronounced anomalies at the phase boundar…
View article: High-pressure crystal growth and investigation of the metal-to-metal transition of Ruddlesden–Popper trilayer nickelates La4Ni3O10
High-pressure crystal growth and investigation of the metal-to-metal transition of Ruddlesden–Popper trilayer nickelates La4Ni3O10 Open
Single crystals of Ruddlesden-Popper nickelates La4Ni3O10 were grown by means of the floating-zone technique at oxygen pressure of 20 bar. Our results reveal the effects of the annealing process under pressure on the crystal structure. We …
View article: High-pressure crystal growth and investigation of the metal-to-metal transition of Ruddlesden-Popper trilayer nickelates La$_4$Ni$_3$O$_{10}$
High-pressure crystal growth and investigation of the metal-to-metal transition of Ruddlesden-Popper trilayer nickelates La$_4$Ni$_3$O$_{10}$ Open
Single crystals of Ruddlesden-Popper nickelates La$_4$Ni$_3$O$_{10}$ were grown by means of the floating-zone technique at oxygen pressure of 20~bar. Our results reveal the effects of the annealing process under pressure on the crystal str…
View article: 1/3 plateau and 3/5 discontinuity in the magnetization and the magnetic phase diagram of hexagonal GdInO$_3$
1/3 plateau and 3/5 discontinuity in the magnetization and the magnetic phase diagram of hexagonal GdInO$_3$ Open
We report the high-pressure optical floating-zone growth of GdInO$_3$ single crystals and show its magnetic phase diagram down to the mK-regime as determined by magnetization measurements. The centered-honeycomb lattice structure shows con…
View article: Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials
Synthetically encapsulated & self-organized transition metal oxide nano-structures inside carbon nanotubes as robust: Li-ion battery anode materials Open
We report a comparative study on the electrochemical performance of four different transition metal oxides encapsulated inside carbon nanotubes (oxides@CNT), along with reference data obtained on a bare-oxide . A key result here is that th…
View article: Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl<sub>3</sub>
Sonication-assisted liquid exfoliation and size-dependent properties of magnetic two-dimensional α-RuCl<sub>3</sub> Open
Originating from the hexagonal arrangement of magnetic ions in the presence of strong spin orbit coupling, α -RuCl 3 is considered as model system for the Kitaev-Heisenberg model. While the magnetic properties of α -RuCl 3 have been studie…
View article: Exfoliablity, magnetism, energy storage and stability of metal thiophosphate nanosheets made in liquid medium
Exfoliablity, magnetism, energy storage and stability of metal thiophosphate nanosheets made in liquid medium Open
The family of antiferromagnetic layered metal hexathiohypo diphosphates, M 2 P 2 S 6 represents a versatile class of materials, particularly interesting for fundamental studies on magnetic properties in low dimensional structures, and yet …
View article: Redox-active, porous pyrene tetraone dendritic polymers as cathode materials for lithium-ion batteries
Redox-active, porous pyrene tetraone dendritic polymers as cathode materials for lithium-ion batteries Open
Redox active, insoluble pyrene tetraone based dendritic porous polymers were synthesized by using different catalyst loadings and work-up procedures.
View article: Fabrication of 3D graphene/MoS2 spherical heterostructure as anode material in Li-ion battery
Fabrication of 3D graphene/MoS2 spherical heterostructure as anode material in Li-ion battery Open
Three-dimensional (3D) graphene-based nanocomposites have received considerable attention in both fundamental research and industrial applications, as they combine the functionalities of well-controlled nano-architectures and the integrity…
View article: The role of magnetoelastic coupling and magnetic anisotropy in MnTiO$_3$
The role of magnetoelastic coupling and magnetic anisotropy in MnTiO$_3$ Open
We report the thermodynamic properties studied by thermal expansion, magnetostriction, magnetisation, and specific heat measurements as well as the low-energy magnetic excitations of \mto\ and investigate how magneto-elastic coupling and m…
View article: Strong uniaxial pressure dependencies evidencing spin-lattice coupling and spin fluctuations in Cr$_2$Ge$_2$Te$_6$
Strong uniaxial pressure dependencies evidencing spin-lattice coupling and spin fluctuations in Cr$_2$Ge$_2$Te$_6$ Open
Single crystals of Cr$_2$Ge$_2$Te$_6$ were studied by high-resolution capacitance dilatometry to obtain in-plane ($B\parallel ab$) and out-of-plane ($B\parallel c$) thermal expansion and magnetostriction at temperatures between 2 and 300 K…
View article: CSD 2082344: Experimental Crystal Structure Determination
CSD 2082344: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…
View article: CSD 2082346: Experimental Crystal Structure Determination
CSD 2082346: Experimental Crystal Structure Determination Open
An entry from the Inorganic Crystal Structure Database, the world’s repository for inorganic crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely availabl…