Disorder-enhanced nuclear spin relaxation at Landau level filling factor one*
Guan Tonga), Benedikt Friessb), Li Yong-Qinga)†, Yan Shi-Shenc), Vladimir Umanskyd), Klaus von Klitzingb), Jurgen H. Smetb)‡
       
(a) Filling factor dependence of the nuclear spin relaxation rate, 1/ T 1, measured at B = 9 T at the base temperature for sample A. The experimental data (symbols) are compared with the model of Côté et al. [ 23 ] proposed for disorder-free Skyrme crystals (dotted lines following 1/ T 1 ∝ | ν – 1|). The width of the tilted plateau is labeled as Δ ν TP. (b) Filling factor dependences of 1/ T 1 for sample A with B = 9 T at T = 10, 37, 46, 72, and 84 mK (from bottom to top). (c) and (d) Filling factor dependences of the longitudinal resistance R xx (c) and 1/ T 1 (d) at B = 6, 9, 12 T for sample A and 4.1 T for sample B. The measurements were carried out at T = 46 mK and the base temperature for samples A and B, respectively. In panel (c), the R xx – ν curves are offset by 2 kΩ intervals for clarity.