论文标题
单分子磁铁中异常低拉曼指数的起源
Origins of anomalously low Raman exponents in single-molecule magnets
论文作者
论文摘要
单分子磁弛豫的拉曼指数可能会由于分子晶体的富声子频谱和自旋量耦合而产生各种意外值。我们系统地检查了不同异常的起源，并澄清了过去的误解，尤其是对指数拟合程序的适当性。我们发现，光语音子提出的指数定律可以产生低指数的虚假幂定律。该观察结果表明，在大量的单分子磁体中，低拉曼指数的起源长期存在。由旋转晶格耦合与光学模式相结合，这些指数的存在表明局部动力环境在此制度中对磁弛豫的重要性。
The Raman exponent of single-molecular magnetic relaxation may take various unexpected values because of rich phonon spectrum and spin-phonon coupling of molecular crystals. We systematically examine the origins of different abnormalities, and clarify misunderstandings in the past, particularly the appropriateness of the fitting procedures for the exponents. We find that exponential laws raised by optical phonons can yield spurious power laws with low exponents. This observation indicates long-standing misunderstandings for origins of low Raman exponents in a large bulk of single-molecule magnets. Resulting from spin-lattice coupling with optical modes, presence of these exponents suggests the importance of the local dynamical environment for the magnetic relaxation in this regime.
