Supersolid phases of a doped valence-bond quantum antiferromagnet: Evidence for a coexisting superconducting order parameter

Abstract

Motivated by numerical evidence of the valence bond groundstate of the two-dimensional Heisenberg pyrochlore lattice, we argue using a $t$-$J$ model that it evolves under doping into novel phases characterized by superconductivity coexisting with the underlying valence-bond solid order. A fermionic mean-field theory supplemented by exact diagonalization results provide strong arguments in favor of the stability of such supersolid phases. The resemblance with modulated superconducting patterns in high-$T_c$ cuprates as well as possible relevance to frustrated noncuprate superconductors such as spinels and pyrochlores is discussed.

4+ pages, 5 figures, minor corrections, version as published

References in corpus (8)

• Bose-Einstein Condensation in Magnetic Insulators
• An Intrinsic Bond-Centered Electronic Glass with Unidirectional Domains in Underdoped Cuprates
• Supersolid hardcore bosons on the triangular lattice
• Unidirectional d-wave superconducting domains in the two-dimensional t-J model
• Quantum and thermal transitions out of the supersolid phase of a 2D quantum antiferromagnet
• Bond order from disorder in the planar pyrochlore magnet
• Imaging bond order near non-magnetic impurities in square lattice antiferromagnets
• Enhanced pairing in doped quantum magnets with frustrating hole motion