Hiroki Ueda¹, Elizabeth Skoropata¹, Max Burian¹, Victor Ukleev¹, Gerard Sylvester Perren¹, Ludmila Leroy¹, Julien Zaccaro¹, Urs Staub^1*

1 Swiss Light Source, Paul Scherrer Institut, 5232 Villigen-PSI, Switzerland

* Corresponding authors emails: urs.staub@psi.ch

DOI10.24435/materialscloud:mt-xv [version v1]

Publication date: Nov 10, 2022

How to cite this record

Hiroki Ueda, Elizabeth Skoropata, Max Burian, Victor Ukleev, Gerard Sylvester Perren, Ludmila Leroy, Julien Zaccaro, Urs Staub, Conical spin order with chiral quadrupole helix in CsCuCl₃, Materials Cloud Archive 2022.141 (2022), doi: 10.24435/materialscloud:mt-xv.

Description

Here we report a resonant x-ray diffraction (RXD) study at the Cu L₃ edge on the multichiral system CsCuCl₃, exhibiting helical magnetic order in a chiral crystal structure. RXD is a powerful technique to disentangle electronic degrees of freedom due to its sensitivity to electric monopoles (charge), magnetic dipoles (spin), and electric quadrupoles (orbital). We characterize electric quadrupole moments around Cu ascribed to the unoccupied Cu 3d orbital, whose quantization axis is off the basal plane. Detailed investigation of magnetic reflections reveals additional sinusoidal modulations along the principal axis superimposed on the reported helical structure, i.e., a longitudinal conical (helical-butterfly) structure. The out-of-plane modulations imply significant spin-orbit interaction despite S=1/2 of Cu²⁺.

Materials Cloud sections using this data

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Fig3.zip MD5md5:fdb363a777ee807fcb65a47c1beecb63	35.0 KiB	Data files from Fig. 3 of manuscript
Fig4.zip MD5md5:605f9afe8b5b56f74598c9f9fa066475	9.3 KiB	Data files from Fig. 4 of manuscript
Fig5.zip MD5md5:6562ab5ebb41e584e9519ded3db165d0	5.0 KiB	Data files from Fig. 5 of manuscript
README.txt MD5md5:b306ad6f54db6dea7d409a792877d129	3.0 KiB	Description of files

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Keywords

Experimental MARVEL H2020