例如:通过计算石墨烯中的Peierls substitution,可以发现只有凑出一个六角格子的面积,才能使得Hofstadter蝴蝶在满一个周期时,某个跃迁在每个元胞中的的相位始终都是2pi的整数倍。也就是说如果某个元胞的某个跃迁的相位是零,那么在下一个元胞的相同的位置相位应该为2pi,这样整体体系才会完全重复。具体参考:六角格子的...
peierls substitutionpseudodifferential equationkinetic momentumadiabatic approximationperiodic schroedinger operatorstationary phase methodWe consider a periodic schrodinger operator in a constant magnetic field with vector potential A(x). A version of adiabatic approximation for quantum mechanical equations with ...
The method of Peierls substitution in studying the magnetic subband structure of a hexagonal lattice is re-examined. Several errors in the formalism of a couple of recent papers are pointed out and rectified so as to describe the effect of the magnetic field correctly. 展开 关键词: polyfluoren...
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In the spinel CuIr2S4 system, previous reports have shown that any chemical substitution would suppress or destroy the Peierls-like phase transition. Herein, we present our investigations on the Cu1−xLixIr2S4 system, where the Peierls-like phase transition is enhanced by the doping of Li. To...
In the spinel CuIr_2S_4 system, previous reports have shown that any chemical substitution would suppress or destroy the Peierls-like phase transition. Herein, we present our investigations on the Cu _(1-x)Li_xIr_2S_4 system, where the Peierls-like phase transition is enhanced by the doping...
The results are compared with recent Monte Carlo studies on substituted spin ladders, pointing to a similar instability of coupled, dimerized spin chains and spin ladders upon substitution. 展开 关键词: micromagnetism spin valves magnetoresistive heads DOI: http://dx.doi.org/10.1103/PhysRevB....
The transition temperature reduced rapidly upon p-CyDOV-H substitution and the spin-Peierls state disappeared around x=0.07. The effect of p-CyDOV-H substitution was not observed in the X-ray diffraction pattern of p-CyDOV.doi:10.1016/S0009-2614(98)00731-3Javad B Jamali...
Effects of substitution of Zn for Cu in the spin-Peierls cuprate, CuGeO3: The suppression of the spin-Peierls transition and the occurrence of a new spin-g... The magnetic susceptibilities of polycrystalline CuZnGeOwere measured to study the effects of nonmagnetic impurities on the spin-Peierls...
Fe-substitution effectsferromagnetismWe have employed the improved Peierls-Nabarro (P-N) equation to study the properties of 1/2 edge dislocation in {111} plane in FCC metals Al, Cu, Ir, Pd, and Pt. The generalized-stacking-fault energy (GSFE) surface entering the equation is calculated by...