Article
Effective One-Dimensional Coupling in the Highly Frustrated Square-Lattice Itinerant Magnet CaCo 2 − y As 2
Ames Laboratory Accepted Manuscripts
Publication Date
10-2-2017
Department
Physics and Astronomy; Ames Laboratory
DOI
10.1103/PhysRevLett.119.147201
Journal Title
Physical Review Letters
Abstract
Inelastic neutron scattering measurements on the itinerant antiferromagnet CaCo2−yAs2 at a temperature of 8 K reveal two orthogonal planes of scattering perpendicular to the Co square lattice in reciprocal space, demonstrating the presence of effective one-dimensional spin interactions. These results are shown to arise from near-perfect bond frustration within the J1-J2 Heisenberg model on a square lattice with ferromagnetic J1 and hence indicate that the extensive previous experimental and theoretical study of the J1-J2 Heisenberg model on local-moment square spin lattices should be expanded to include itinerant spin systems.
DOE Contract Number(s)
AC02-07CH11358
Publisher
Iowa State University Digital Repository, Ames IA (United States)
Disciplines
Citation Information
Aashish Sapkota, B. G. Ueland, V. K. Anand, N. S. Sangeetha, et al.. "Effective One-Dimensional Coupling in the Highly Frustrated Square-Lattice Itinerant Magnet CaCo 2 − y As 2" Vol. 119 Iss. 14 (2017) p. 147201-1 - 147201-5 Available at: http://works.bepress.com/ai-goldman/38/