508 citations · 4k across the 58 of their papers we have counts for
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Quasimolecular electronic structure of the spin-liquid candidate BaInIrO
A. Revelli, M. Moretti Sala, G. Monaco +16
The mixed-valent iridate Ba3InIr2O9 has been discussed as a promising candidate for quantum spin-liquid behavior. The compound exhibits Ir ions in face-sharing IrO6 octahe…
Evidence for current-induced phase coexistence in CaRuO and its influence on magnetic order
K. Jenni, F. Wirth, K. Dietrich +7
Combining quasistatic and time-resolved transport measurements with X-ray and neutron diffraction experiments we study the non-equilibrium states that arise in pure and in Ti subst…
Large positive magneto-conductivity at microwave frequencies in the compensated topological insulator BiSbTeSe2
Mahasweta Bagchi, Lea Pitz-Paal, Christoph P. Grams +6
The bulk electronic properties of compensated topological insulators are strongly affected by the self-organized formation of charge puddles at low temperature, but their response…
Domain dynamics in LiCuVO: Evidence for polarized nanoregions
Christoph P. Grams, Severin Kopatz, Daniel Brüning +5
LiCuVO is a model system of a 1D spin-1/2 chain that enters a planar spin-spiral ground state below its Néel temperature of 2.4 K due to competing nearest and next nearest neig…
Interplay between antiferrodistortive, ferroelectric and superconducting instabilities in Sr_{1-x}Ca_{x}$TiO_{3-δ}
B. S. de Lima, M. S. da Luz, F. S. Oliveira +11
SrTiO undergoes a cubic-to-tetragonal phase transition at 105K. This antiferrodistortive transition is believed to be in competition with incipient ferroelectricity. Substitu…
Critical speeding-up near the monopole liquid-gas transition in magnetoelectric spin-ice
Christoph P. Grams, Martin Valldor, Markus Garst +1
Competing interactions in the so-called spin-ice compounds stabilize a frustrated ground-state with finite zero-point entropy and, interestingly, emergent magnetic monopole excitat…
CdV2O4: A rare example of a collinear multiferroic spinel
G. Giovannetti, A. Stroppa, S. Picozzi +11
By studying the dielectric properties of the geometrically frustrated spinel CdV2O4, we observe ferroelectricity developing at the transition into the collinear antiferromagnetic g…
Soft-mode behavior of electromagnons in multiferroic manganite
A. M. Shuvaev, J. Hemberger, D. Niermann +6
The behavior of the low-frequency electromagnon in multiferroic DyMnO3 has been investigated in external magnetic fields and in a magnetically ordered state. Significant softening…
Electronic structure of the two-dimensional Heisenberg antiferromagnet VOCl: a multi-orbital Mott insulator
S. Glawion, M. R. Scholz, Y. -Z. Zhang +7
We have studied the electronic structure of the two-dimensional Heisenberg antiferromagnet VOCl using photoemission spectroscopy and density functional theory including local Coulo…
Relaxations as key to the magnetocapacitive effects in the perovskite manganites
F. Schrettle, P. Lunkenheimer, J. Hemberger +4
We present a detailed dielectric study of the relaxation effects that occur in several perovskite rare-earth manganites, including the multiferroics TbMnO3 and DyMnO3. We demonstra…
Switching the Ferroelectric Polarization by External Magnetic Fields in the Spin = 1/2 Chain Cuprate LiCuVO4
F. Schrettle, S. Krohns, P. Lunkenheimer +5
We present a detailed study of complex dielectric constant and ferroelectric polarization in multiferroic LiCuVO4 as function of temperature and external magnetic field. In zero ex…
Polar phonons and spin-phonon coupling in HgCr2S4 and CdCr2S4
T. Rudolf, Ch. Kant, F. Mayr +3
Polar phonons of HgCr2S4 and CdCr2S4 are studied by far-infrared spectroscopy as a function of temperature and external magnetic field. Eigenfrequencies, damping constants, effecti…
Absence of commensurate ordering at the polarization flop transition in multiferroic DyMnO3
J. Strempfer, B. Bohnenbuck, M. Mostovoy +6
Ferroelectric spiral magnets DyMnO3 and TbMnO3 show similar behavior of electric polarization in applied magnetic fields. Studies of the field dependence of lattice modulations on…
Anomalous thermal expansion and strong damping of the thermal conductivity of NdMnO and TbMnO due to 4f crystal-field excitations
K. Berggold, J. Baier, D. Meier +6
We present measurements of the thermal conductivity and the thermal expansion of NdMnO and TbMnO. In both compounds a splitting of the multiplet of the $R^{3+}…
Evidence for local lattice distortions in giant magnetocapacitive CdCr2S4
V. Gnezdilov, P. Lemmens, Yu. G. Pashkevich +6
Raman scattering experiments on CdCr2S4 single crystals show pronounced anomalies in intensity and frequency of optical phonon modes with an onset temperature T*=130 K that coincid…
Spin-phonon coupling in antiferromagnetic chromium spinels
T. Rudolf, Ch. Kant, F. Mayr +3
The temperature dependence of eigenfrequencies and intensities of the IR active modes has been investigated for the antiferromagnetic chromium spinel compounds CdCr2O4, ZnCr2O4, Zn…
Spin-phonon coupling in ZnCr2Se4
T. Rudolf, Ch. Kant, F. Mayr +3
Spin-phonon coupling and magnetodielectric effects of ZnCr2Se4 were investigated by means of infrared (IR) spectroscopy as a function of temperature and magnetic field. ZnCr2Se4 is…
Multiferroicity and colossal magneto-capacitance in Cr-thiospinels
J. Hemberger, P. Lunkenheimer, R. Fichtl +3
The sulfur based Cr-spinels RCr2S4 with R = Cd and Hg exhibit the coexistence of ferromagnetic and ferroelectric properties together with a pronounced magnetocapacitive coupling. W…
Uniaxial pressure dependencies of the phase transitions in GdMnO
J. Baier, D. Meier, K. Berggold +4
GdMnO shows an incommensurate antiferromagnetic order below K, transforms into a canted A-type antiferromagnet below K, and for finite magnetic fields a…
The multiferroic phases of (Eu:Y)MnO3
J. Hemberger, F. Schrettle, A. Pimenov +5
We report on structural, magnetic, dielectric, and thermodynamic properties of (Eu:Y)MnO3 for Y doping levels 0 <= x < 1. This system resembles the multiferroic perovskite manganit…
Spin-driven Phonon Splitting in Bond-frustrated ZnCr2S4
J. Hemberger, T. Rudolf, H. -A. Krug von Nidda +4
Utilizing magnetic susceptibility, specific heat, thermal expansion and IR spectroscopy we provide experimental evidence that the two subsequent antiferromagnetic transitions in Zn…
Spin dynamics in the low-dimensional magnet TiOCl
D. V. Zakharov, J. Deisenhofer, H. -A. Krug von Nidda +9
We present detailed ESR investigations on single crystals of the low-dimensional quantum magnet TiOCl. The anisotropy of the g-factor indicates a stable orbital configuration below…
Colossal magnetocapacitance and colossal magnetoresistance in HgCr2S4
S. Weber, P. Lunkenheimer, R. Fichtl +3
We present a detailed study of the dielectric and charge transport properties of the antiferromagnetic cubic spinel HgCr2S4. Similar to the findings in ferromagnetic CdCr2S4, the d…
31P NMR study of Na2CuP2O7: a S=1/2 two-dimensional Heisenberg antiferromagnetic system
R. Nath, A. V. Mahajan, N. Buettgen +3
The magnetic properties of Na2CuP2O7 were investigated by means of 31P nuclear magnetic resonance (NMR), magnetic susceptibility, and heat capacity measurements. We report the 31P…