U. Nagel

activity

19992026

most citedFour-coloured Spin-wave Excitations in Multiferroic Materials

115 citations · 341 across the 11 of their papers we have counts for

collaborators

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7 papers · 1 filter

cond-mat.str-el2026

Magnetization processes and spin dynamics across field-induced phase transitions in the quasi-two-dimensional quantum magnet Cu $_{2}$ (OH) $_{3}$ 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- $1/2$ magnet $C u_{2} (OH)_{3} Br$ , consisting of alternately c…

cond-mat.str-el2026

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…

cond-mat.str-el2024★ 4 cited

Low-energy spin excitations in field-induced phases of the spin-ladder antiferromagnet BiCu $_{2}$ PO $_{6}$

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 BiCu $_{2}$ PO $_{6}$ as a function of t…

cond-mat.str-el2013★ 68 cited

Terahertz spectroscopy of spin waves in multiferroic BiFeO $_{3}$ 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…

cond-mat.str-el2009★ 27 cited

Magnetic excitations and optical transitions in the multiferroic spin-1/2 system LiCu $_{2}$ O $_{2}$

D. Hüvonen, U. Nagel, T. Rõõm +4

Magnetic excitations in cycloidal magnet LiCu $_{2}$ O $_{2}$ are explored using THz absorption spectroscopy in magnetic fields up to 12 T. Below the spin ordering temperature we observe…

cond-mat.str-el2008★ 47 cited

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 $β^{''}$ -(BEDT-TTF)2 SF5 CH2 CF2 SO3 both by means of vibrational spectroscopy, l…

cond-mat.str-el1999★ 40 cited

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…

Magnetization processes and spin dynamics across field-induced phase transitions in the quasi-two-dimensional quantum magnet Cu2​(OH)3​Br