Abstract
The low-energy magnetic excitation spectrum of the Heisenberg antiferromagnetic S=1/2 chain system Sr2CuO3 with Ni and Ca impurities is studied by neutron spectroscopy. In all cases, a defect-induced spectral pseudogap is observed and shown to scale proportionately to the number of scattering centers in the spin chains.
Original language | English |
---|---|
Article number | 054409 |
Journal | Physical Review B |
Volume | 95 |
Issue number | 5 |
DOIs | |
Publication status | Published - 7 Feb 2017 |
Externally published | Yes |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics