115 citations · 341 across the 11 of their papers we have counts for
11 papers
Magnetization processes and spin dynamics across field-induced phase transitions in the quasi-two-dimensional quantum magnet Cu(OH)Br
Anneke Reinold, Dirk Wulferding, Laur Peedu +13
We present magnetic-field-dependent evolution of magnetization and spin dynamics in the quasi-two-dimensional spin- magnet , consisting of alternately c…
Magnetic quantum defects in a uniaxial antiferromagnetic insulator
Shangfei Wu, Laur Peedu, Zhihao Wang +12
Point defects have been successfully utilized in various quantum technologies, serving as quantum qubits for quantum computation, single-photon emitters for quantum communication,…
Observation of an emergent energy scale close to dimensional reduction in a quasi-two-dimensional quantum magnet
Anneke Reinold, Laur Peedu, Kirill Amelin +19
By appropriately perturbing a critical transverse-field Ising chain away from its critical point, the system can develop a finite correlation length with a characteristic purely ma…
Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCuPO
Patrick Pilch, Kirill Amelin, Gary Schmiedinghoff +13
We report on terahertz spectroscopic measurements of quantum spin dynamics on single crystals of a spin-1/2 frustrated spin-ladder antiferromagnet BiCuPO as a function of t…
Simultaneously Magnetic- and Electric-dipole Active Spin Excitations Govern the Static Magnetoelectric Effect in Multiferroic Materials
D. Szaller, S. Bordacs, V. Kocsis +3
We derive a sum rule to demonstrate that the static magnetoelectric (ME) effect is governed by optical transitions that are simultaneously excited via the electric and magnetic com…
Four-coloured Spin-wave Excitations in Multiferroic Materials
Istvan Kezsmarki, David Szaller, Sandor Bordacs +5
The optical magnetoelectric effect, which is an inherent attribute of the spin excitations in multiferroics, drastically changes their optical properties compared to conventional m…
Terahertz spectroscopy of spin waves in multiferroic BiFeO in high magnetic fields
U. Nagel, Randy S. Fishman, T. Katuwal +5
We have studied the magnetic field dependence of far-infrared active magnetic modes in a single ferroelectric domain \BFO/ crystal at low temperature. The modes soften close to the…
Optical signature of sub-gap absorption in the superconducting state of Ba(Fe,Co)2As2
R. P. S. M. Lobo, Y. M. Dai, U. Nagel +5
The optical conductivity of Ba(FeCo)As shows a clear signature of the superconducting gap, but a simple -wave description fails in accounting for the l…
Magnetic excitations and optical transitions in the multiferroic spin-1/2 system LiCuO
D. Hüvonen, U. Nagel, T. Rõõm +4
Magnetic excitations in cycloidal magnet LiCuO are explored using THz absorption spectroscopy in magnetic fields up to 12 T. Below the spin ordering temperature we observe…
Bandwidth tuning triggers interplay of charge order and superconductivity in two-dimensional organic materials
S. Kaiser, M. Dressel, Y. Sun +4
We observe charge-order fluctuations in the quasi-two-dimensional organic superconductor -(BEDT-TTF)2 SF5 CH2 CF2 SO3 both by means of vibrational spectroscopy, l…
Far infrared study of the two dimensional dimer spin system SrCu_2(BO_3)_2
T. Room, U. Nagel, E. Lippmaa +3
Using far-infrared spectroscopy in magnetic fields up to 12T we have studied a two-dimensional dimer spin gap system SrCu_2(BO_3)_2. We found several infrared active modes in the d…