Evidence for a Singlet-Triplet Transition in Spin-Peierls System CuGe<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span>

O. Fujita; J. Akimitsu; M. Nishi; K. Kakurai

doi:10.1103/PhysRevLett.74.1677

Evidence for a Singlet-Triplet Transition in Spin-Peierls System CuGe $O_{3}$

O. Fujita, J. Akimitsu, M. Nishi, and K. Kakurai

Phys. Rev. Lett. 74, 1677 – Published 27 February 1995

Abstract

The magnetic field dependence of the spin-Peierls gap in CuGe $O_{3}$ has been studied by means of neutron inelastic scattering. The splitting of the single gap state into three distinct excitation branches under a magnetic field can be regarded as direct evidence for the singlet-triplet transition in a spin-Peierls system.