Excitations in a quantum spin liquid with random bonds

Article

关键词: SINGLET-GROUND-STATE;    MAGNETIC EXCITATIONS;    NEUTRON-SCATTERING;    ANTIFERROMAGNET;    TRANSITION;    GAP;   

DOI  :  10.1103/PhysRevB.86.214408

来源: SCIE

【 摘 要 】

We present the results of an inelastic neutron-scattering study on two bond disordered quasi-two-dimensional quantum magnets (C4H12N2)Cu-2(Cl1-xBrx)(6) with x = 0.035 and 0.075. We observe an increase of spin gap, a reduction of magnon bandwidth, and a decrease of magnon lifetimes compared to the x = 0 sample. Additional magnon damping is observed at higher energies away from the zone center, which is found to follow the density of single-particle states. DOI: 10.1103/PhysRevB.86.214408

【 授权许可】

Free