DTADH and quantum critical phenomena caused by anisotropy and external magnetic field for spin-1/2 Heisenberg diamond chains

Using the transfer matrix renormalization group (TMRG) method, we study the connection between the first derivative of the thermal average of driving-term Hamiltonian (DTADH) and the trace of quantum critical behaviors at finite temperatures. Connecting with the exact diagonalization method, we give the phase diagrams and analyze the properties of each phase for both the ferromagnetic and anti-ferromagnetic frustrated J(3) anisotropy diamond chain models. The finite-temperature scaling behaviors near the critical regions are also investigated. Further, we show the critical behaviors driven by external magnetic field, analyze the formation of the 1/3 magnetic plateau and the influence of different interactions on those critical points for both the ferrimagnetic and anti-ferromagnetic distorted diamond chains.

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-06-05T07:46:05Z No. of bitstreams: 1 DTADH and quantum critical phenomena caused by anisotropy and external magnetic field for spin-12 Heisenberg diamond chains.pdf: 1639868 bytes, checksum: 146f38a2678da554b2f9473313e2dac8 (MD5)

Approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-06-05T07:47:36Z (GMT) No. of bitstreams: 1 DTADH and quantum critical phenomena caused by anisotropy and external magnetic field for spin-12 Heisenberg diamond chains.pdf: 1639868 bytes, checksum: 146f38a2678da554b2f9473313e2dac8 (MD5)

Made available in DSpace on 2010-06-05T07:47:36Z (GMT). No. of bitstreams: 1 DTADH and quantum critical phenomena caused by anisotropy and external magnetic field for spin-12 Heisenberg diamond chains.pdf: 1639868 bytes, checksum: 146f38a2678da554b2f9473313e2dac8 (MD5) Previous issue date: 2010

This work was supported by the National Basic Research Program of China (973 Program) Grant No. G2009CB929300 and the National Natural Science Foundation of China under Grant Nos. 60521001 and 60776061.

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This work was supported by the National Basic Research Program of China (973 Program) Grant No. G2009CB929300 and the National Natural Science Foundation of China under Grant Nos. 60521001 and 60776061.