Tracy L A, Eisenstein J P, Pfeiffer L N, West K W
California Institute of Technology, Pasadena, CA 91125, USA.
Phys Rev Lett. 2007 Feb 23;98(8):086801. doi: 10.1103/PhysRevLett.98.086801. Epub 2007 Feb 22.
The transition from partial to complete spin polarization of two-dimensional electrons at half filling of the lowest Landau level has been studied using resistively detected nuclear magnetic resonance (RDNMR). The nuclear spin-lattice relaxation time is observed to be density independent in the partially polarized phase but to increase sharply at the transition to full polarization. At low temperatures the RDNMR signal exhibits a strong maximum near the critical density.
利用电阻检测核磁共振（RDNMR）研究了最低朗道能级半填充时二维电子从部分自旋极化到完全自旋极化的转变。观察到核自旋-晶格弛豫时间在部分极化相中与密度无关，但在向完全极化转变时急剧增加。在低温下，RDNMR信号在临界密度附近呈现出强烈的最大值。
