Ward T Z, Zhang X G, Yin L F, Zhang X Q, Liu Ming, Snijders P C, Jesse S, Plummer E W, Cheng Z H, Dagotto E, Shen J
Materials Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA.
Phys Rev Lett. 2009 Feb 27;102(8):087201. doi: 10.1103/PhysRevLett.102.087201. Epub 2009 Feb 23.
The dynamics of first-order electronic phase transitions in complex transition metal oxides are not well understood but are crucial in understanding the emergent phenomena of electronic phase separation. We show that a manganite system reduced to the scale of its inherent electronic charge-ordered insulating and ferromagnetic metal phase domains allows for the direct observation of single electronic phase domain fluctuations within a critical regime of temperature and magnetic field at the metal-insulator transition.
复杂过渡金属氧化物中一阶电子相变的动力学尚未得到很好的理解，但对于理解电子相分离的涌现现象至关重要。我们表明，一个被缩小到其固有电荷有序绝缘相和铁磁金属相畴尺度的锰氧化物体系，能够在金属-绝缘体转变的温度和磁场临界区域内直接观测到单个电子相畴的涨落。
