Phase and structural order in mixture of nematic liquid crystals and anisotropic nanoparticles

Thermoelectric signature of the nematic phase in hole-doped iron-based superconductors

“…The pseudo-critical exponent β shown in Fig. 4b stays within the 1 -4 range for (Ca,Ba)(Fe1-xCox)2As2, which is about one order of magnitude higher in than values observed in liquid crystals [27,28]. According to A. Ranjkesh et al the pseudo-critical exponent is supposed to rise with concentrations of impurities [28] and estimated β in (Ba,Co)(Fe1-xCox)2As2 seems to roughly obey this rule increasing with x (since growing substitution of iron with cobalt leads inevitably to an increased disorder).…”

“…Therefore, in Fig. 4a plotted is the absolute value of the Nernst anisotropy divided by T to account for the fact that the Nernst coefficient, being a measure of transverse entropy flow [26], expected to be accurate close to the transition temperature [28].…”

Hydrogen-bonded liquid crystals with broad-range blue phases

“…The b value in the N*-phase is similar to those seen in calamitic (viz. between 0.1 and 0.2) 27 and bentcore nematogens (ca. 0.16).…”

Hints for the nematic pseudogap in the nearly optimally doped La2−xSrxCuO4 superconductor

“…4 we fit the S(T )/T and ν(T )/T data with the equation proposed to describe the nematic order parameter in liquid crystals [59], ν/T = α(1 − T T H ) β , where α is the proportional constant, β is the pseudocritical exponent, and T H is a characteristic temperature somewhat lower than the actual temperature of the discontinuous nematic-isotropic transition. Interestingly, this fit seems to be universally applicable to the Nernst data from many different compounds, although the obtained values of β are much different (e.g., β ≈ 2.6 for La 1.86 Sr 0.14 CuO 4 ) than values expected for liquid crystals, i.e., β ≈ 0.25 [60].…”