Path Integral Approach of Quantum Heisenberg Planar Spin Glass Model in the Presencesof Random Field |
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| Authors: | MA Yuqiang |
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| Institution: | Department of Physics and Laboratory of Solid State Micro-Structures, Nanjing University, Nanjing 210093, China |
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| Abstract: | A quantum version of the site-random Heisenberg planar XY model in a random field is presented in the boson representation. Like classical spherical model in the spin space, the model can be solved exactly within the coherent state path integral-representation. The phase diagram is obtained, and the effects of the randomness and quantum fluctuations on the onset of a spin glass phase are discussed. |
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| Keywords: | Heisenberg planar model phase transition |
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