Sub-millikelvin station at Synergetic Extreme Condition User Facility<xref rid="cpb_27_7_070702fn1" ref-type="fn">*</xref> <fn id="cpb_27_7_070702fn1"> <label>*</label> <p>Project supported by the National Basic Research Program of China (Grant Nos. 2016YFA0300601, 2015CB921402, 2011CB921702, and 2009CB929101), the National Natural Science Foundation of China (Grant Nos. 11527806, 91221203, 11174340, 11174357, and 91421303), and the Strategic Priority Research Program B of the Chinese Academy of Sciences (Grant No. XDB07010100). Z.G.C. acknowledges the support from Hundreds Talent Program, Chinese Academy of Sciences.</p> </fn>

Sub-millikelvin station at Synergetic Extreme Condition User Facility* *

Project supported by the National Basic Research Program of China (Grant Nos. 2016YFA0300601, 2015CB921402, 2011CB921702, and 2009CB929101), the National Natural Science Foundation of China (Grant Nos. 11527806, 91221203, 11174340, 11174357, and 91421303), and the Strategic Priority Research Program B of the Chinese Academy of Sciences (Grant No. XDB07010100). Z.G.C. acknowledges the support from Hundreds Talent Program, Chinese Academy of Sciences.

Cheng Zhi Gang^{1, †}, Fan Jie¹, Jing Xiunian¹, Lu Li^{1, 2}

(color online) (a) Gap energies with various filling factors for two samples, plotted with closed and open circles. The horizontal scale of the magnetic field has been shifted to match the filling factors between the two samples (regenerated from Ref. [5]). (b) Dependence of the energy gaps on the effective magnetic field B_eff for filling factors of 2+1/3 < ν < 2+2/3 (regenerated from Ref. [56]).