Lebed A G, Wu Si
Department of Physics, University of Arizona, 1118 E. 4th Street, Tucson, Arizona 85721, USA.
Phys Rev Lett. 2007 Jul 13;99(2):026402. doi: 10.1103/PhysRevLett.99.026402. Epub 2007 Jul 11.
We suggest a model to explain the appearance of a high resistance high magnetic field charge-density-wave (CDW) phase, discovered by Graf et al. [Phys. Rev. Lett. 93, 076406 (2004)10.1103/PhysRevLett.93.076406] in (Per)(2)Pt(mnt)(2), where Per is perylene and mnt is maleonitriledithiolate molecules. In particular, we show that the Pauli spin-splitting effects improve the nesting properties of a realistic quasi-one-dimensional electron spectrum and, therefore, a high resistance Peierls CDW phase is stabilized in high magnetic fields. In low and very high magnetic fields, a periodic soliton wall superlattice (SWS) phase is found to be a ground state. We suggest experimental studies of the predicted phase transitions between the Peierls and SWS CDW phases in (Per)(2)Pt(mnt)(2) to discover a unique SWS phase.
我们提出了一个模型，用于解释由格拉夫等人[《物理评论快报》93, 076406 (2004)10.1103/PhysRevLett.93.076406]在(Per)₂Pt(mnt)₂中发现的高电阻高磁场电荷密度波(CDW)相的出现，其中Per是苝，mnt是马来二腈二硫醇盐分子。特别地，我们表明泡利自旋分裂效应改善了实际准一维电子能谱的嵌套特性，因此，高电阻派尔斯CDW相在高磁场中得以稳定。在低磁场和非常高的磁场中，周期性孤子壁超晶格(SWS)相被发现是基态。我们建议对(Per)₂Pt(mnt)₂中派尔斯和SWS CDW相之间预测的相变进行实验研究，以发现独特的SWS相。
