Crystal structures and sign reversal Hall resistivities in iron-based superconductors Lix(C3H10N2)0.32FeSe <inline-formula> <tex-math> <?CDATA $(0.15\lt x\lt 0.4$?> </tex-math><mml:math> <mml:mo stretchy="false">(</mml:mo> <mml:mn>0.15</mml:mn> <mml:mo><</mml:mo> <mml:mi>x</mml:mi> <mml:mo><</mml:mo> <mml:mn>0.4</mml:mn> </mml:math> <inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="cpb_28_6_067401

Crystal structures and sign reversal Hall resistivities in iron-based superconductors Li_x(C₃H₁₀N₂)_0.32FeSe

( 0.15 < x < 0.4

)

Sun Rui-Jin^{1, 2}, Jin Shi-Feng^{1, 3, †}, Deng Jun^{1, 2}, Hao Mu-Nan^{1, 2}, Zhao Lin-Lin^{1, 2}, Fan Xiao^{1, 2}, Sun Xiao-Ning^{1, 2}, Guo Jian-Gang^{1, 2}, Gu Lin^{1, 2, ‡}

Hall effect transverse resistivity ρ xy measurement. (a)–(c) Field-dependent Hall effect transverse resistivity ρ xy for Li_x(C₃H₀N₂)_yFe₂Se₂ (x = 0.15, 0.25, 0.4) samples. (d) Temperature-dependent Hall coefficient for three samples, R_H changes sign from negative to positive at a similar point about 185 K, demonstrating dominant hole carriers appear above 185 K.