An Approach to Temperature Dependence of the Magnetic Excitation in the Spin-Peierls Chain with Frustration(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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概要

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• In an adiabatic approximation we propose a theoretical method which combines the thermal coherent state with a quantum procedure to study temperature dependence of the magnetic excited gap in the spin-Peierls chain with frustration based on the bosonized continuum Hamiltonian. In terms of the thermal coherent state the magnetic excitations at finite temperature can be viewed as the coherent excitations on an incoherent background constituted by the quasiparticles in thermal equilibrium. The formulations of the magnetic excited gap as a function of temperature are obtained analytically by solving a set of coupled equations. As an example, this method is applied to the spin-Peierls compound CuGeO_3. It is shown that our theoretical results are well consistent with the inelastic neutron scattering experimental data for CuGeO_3 in the normalized plane consisted of gap and temperature.

• 社団法人日本物理学会の論文
• 2004-06-15

著者

• GUO G.

  Department of Comprehensive Dentistry and Biomaterials, Louisiana State University Health Sciences C

• Guo G

  Department Of Physics National Taiwan University

• JIANG Xuefan

  Department of Physics, Changshu Institute of Technology

• XING D.

  National Laboratory of Solid State Microstructures, Nanjing University

• Jiang Xuefan

  Department Of Physics Changshu Institute Of Technology

• Xing D

  National Laboratory Of Solid State Microstructures Nanjing University

• Guo G.

  Department Of Comprehensive Dentistry And Biomaterials Louisiana State University Health Sciences Ce

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• An Approach to Temperature Dependence of the Magnetic Excitation in the Spin-Peierls Chain with Frustration(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)

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