Dimerization and spin decoupling in a two-leg Heisenberg ladder with frustrated trimer rungs
Journal Article
·
· Physical Review. B
- Brookhaven National Lab. (BNL), Upton, NY (United States)
We study the antiferromagnetic spin-half Heisenberg ladder in the presence of an additional frustrating rung spin which is motivated and relevant also for the description of real two-dimensional materials such as the two-dimensional trimer magnet Ba4Ir3O10. We study the zero-temperature phase diagram, where we combine numerical and analytical methods into an overall consistent description. All numerical simulations are also accompanied by studies of the dynamical spin structure factor obtained via the density matrix renormalization group. Overall, we find in the regime of strong rung coupling a gapped dimerized phase related to competing symmetry sectors in Hilbert space that ultimately results in frustration-driven spin-Peierls transition. In the weak rung-coupling regime, the system is uniform, yet shows a gapped spinon continuum together with a sharp coherent low-energy branch which renders the system critical overall. In either case, the additional rung spin quickly get sidelined and nearly decouple in the regime when their bare coupling to the ladder is weakened
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0012704
- OSTI ID:
- 1766770
- Report Number(s):
- BNL-221031-2021-JAAM
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 12 Vol. 103; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Antiferromagnets
Density matrix renormalization group
Magnetism
Quantum field theory
Quantum phase transitions
Spin dynamics
Spin lattice models
Spin liquid
Spinon
Spontaneous symmetry breaking
Strongly correlated systems
Symmetries in condensed matter
Tensor network methods
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Antiferromagnets
Density matrix renormalization group
Magnetism
Quantum field theory
Quantum phase transitions
Spin dynamics
Spin lattice models
Spin liquid
Spinon
Spontaneous symmetry breaking
Strongly correlated systems
Symmetries in condensed matter
Tensor network methods