Fig. 2
From: Possible nematic to smectic phase transition in a two-dimensional electron gas at half-filling
Low temperature properties of Sample A. a Magnetotransport in the N = 1 LL from Sample A at T = 12 mK. The presence of FQHS at ν = 5/2 and 12/5 indicates the high quality of this sample. b N = 2 LL transport showing the anisotropic phases at ν = 11/2 and ν = 9/2 at T = 52 mK obtained by sweeping the magnetic field; at this temperature no significant hysteresis or metastability occurs. c N = 2 LL transport at T = 13 mK. Each data point at this temperature was obtained by fixing the magnetic field and cooling from 200 mK down to 13 mK. R xx (red) is measured along the \(\left\langle {1\bar 10} \right\rangle \) direction of the GaAs lattice and R yy (blue) is measured along the \(\left\langle {110} \right\rangle \) direction. Dashed lines indicate the positions of exact half-filling. d ν = 11/2 and e ν = 9/2 R xx (red) and R yy (blue) as a function of temperature taken at exactly half-filling factor for each state. The high temperature values of R xx and R yy are labeled. The colors of the regions indicate the different phases: isotropic liquid (white), nematic liquid crystal (pink), and smectic liquid crystal (blue)
