The J1–J2 model is a
quantum spin model like the
Heisenberg model but also includes a term for the interaction between next-nearest neighbor spins.
Hamiltonian
In this model, the term
represents the usual nearest-neighbor interaction as seen in the Heisenberg model, and
represents the exchange interaction to the ''next'' nearest-neighbor.
:
See also
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Spin model
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Heisenberg model (quantum)
The quantum Heisenberg model, developed by Werner Heisenberg, is a statistical mechanical model used in the study of critical points and phase transitions of magnetic systems, in which the spins of the magnetic systems are treated quantum me ...
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Hubbard model
The Hubbard model is an approximate model used to describe the transition between conducting and insulating systems.
It is particularly useful in solid-state physics. The model is named for John Hubbard.
The Hubbard model states that each ...
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t-J model
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Majumdar–Ghosh model
References
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*{{cite journal, last1=Majumdar, first1=Chanchal K., last2=Ghosh, first2=Dipan K., title=On Next‐Nearest‐Neighbor Interaction in Linear Chain. II, journal=Journal of Mathematical Physics, volume=10, issue=8, year=1969, pages=1399–1402, issn=0022-2488, doi=10.1063/1.1664979
Spin models
Quantum magnetism