Journal
PHYSICAL REVIEW LETTERS
Volume 88, Issue 16, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.88.167203
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Using the random phase approximation, we show that a crossed-chains model of spin-1/2 Heisenberg chains with frustrated interchain couplings has a nondimerized spin-liquid ground state in 2D, with deconfined spinons as the elementary excitations. The results are confirmed by a bosonization study, which shows that the system is an example of a sliding Luttinger liquid. In an external field, the system develops an incommensurate field-induced long-range order with a finite transition temperature.
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