Spinons in a crossed-chains model of a 2D spin liquid |
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Authors: | Starykh Oleg A Singh Rajiv R P Levine Gregory C |
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Institution: | Department of Physics and Astronomy, Hofstra University, Hempstead, New York 11549, USA. |
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Abstract: | 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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