Quantum order-from-disorder in frustrated spin nanotubes

ORAL

Abstract

We investigate purely quantum order-from-disorder in a frustrated spin nanotube, described by a J1-J2 Heisenberg model wrapped around a cylinder. Using Schwinger boson theory and Density Matrix Renormalization Group (DMRG), we compute the ground-state phase diagram, revealing a Z2 phase in which the collinear spin stripes form either a right or left handed helix around the nanotube. We derive an analytic estimate for the critical ηc=J1/2J2 where the Z2 phase transition occurs which is in agreement with the DMRG results.

*This work was supported by DOE Basic Energy Sciences grant DE-SC0020353(P.Ch and Z.Z.) and NSF grant DMR-1830707 (P. Co). This work was partially supported by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering (J.C.G. and P.P.O). Part of the research (J.C.G. P.P.O.) was performed at the Ames National Laboratory, which is operated for the U.S. DOE by Iowa State University under Contract DE-AC02-07CH11358.

–

Presenters

  • Zekun Zhuang

    • Rutgers University

Authors

  • Zekun Zhuang

    • Rutgers University