Energy-gap driven low-temperature magnetic and transport properties in Cr$_{1/3}M$S$_2$ ($M$ = Nb or Ta)
(2021)
Magnetic order and ballistic spin transport in a sine-Gordon spin chain
Physical Review B American Physical Society 103:6 (2021) L060405
Abstract:
We report the results of muon-spin spectroscopy (渭+SR) measurements on the staggered molecular spin chain [pym-Cu(NO3)2(H2O)2] (pym = pyrimidine), a material previously described using sine-Gordon field theory. Zero-field 渭+SR reveals a long range magnetically ordered ground state below a transition temperature TN=0.23(1) K. Using longitudinal-field (LF) 渭+SR we investigate the dynamic response in applied magnetic fields 0 < B < 500 mT and find evidence for ballistic spin transport. Our LF 渭+SR measurements on the chiral spin chain [Cu(pym)(H2O)4]SiF6鈰匟2O instead demonstrate one-dimensional spin diffusion, and the distinct spin transport in these two systems suggests that additional anisotropic interactions play an important role in determining the nature of spin transport in S=1/2 antiferromagnetic chains.Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
Physical Review B American Physical Society (APS) 103:2 (2021) 024428
Position-dependent stability and lifetime of the skyrmion state in nickel-substituted Cu2OSeO3
Physical Review B American Physical Society (APS) 102:22 (2020) 224407
Megahertz dynamics in skyrmion systems probed with muon-spin relaxation
(2020)