Effect of nanostructuring on the band structure and the galvanomagnetic properties in Bi1−xSbx alloys

Abstract

Experimenting with hot isostatically pressed (HIP) nano grained bismuth-telluride-based alloys AIP Conf.

Surface state conductivity in epitaxially grown Bi1−xSbx(111) films

“…In former studies only one activated transport channel at around 30 K was observed which is attributed to thermal activation of charge carriers from bulk valence bands into the conduction band channels [9,21,[37][38][39][40]. In this study, only the rise in conductance at high temperatures corresponds to activated bulk transport while the rise at low temperature is of different origin.…”

“…1 Sb x thin films as well as nanostructured samples [9,37]. Surprisingly, transport via robust surface states, as they were seen in spectroscopy [17], was not taken into account in these former transport studies.…”

Design and test of an apparatus for transient measurements of the thermalconductivity and volumetric heat capacity of solids

“…In a second experiment the thermal properties of a bismuth-antimony alloy (Bi 0.8 Sb 0.2 ) sample were investigated. The sample was prepared by cold pressing from ball-milled nanoparticles followed by a sintering step and exhibited an electrical conductivity of about 2 × 10 5 Sm −1 at ambient temperature [27]. A temperature sweep in transient mode was performed and the corresponding results for κ and cρ are depicted in Figure 7.…”

Enhanced thermoelectric properties of hydrothermally synthesized Bi0.88−xZnxSb0.12 nanoalloys below the semiconductor–semimetal transition temperature

“…40 The temperature dependence of the electrical conductivity for Bi 0.88Àx Zn x Sb 0.12 is expected to be closely associated with the relative shiing of the T, L s , and L a bands. 41,42 The downturn of electrical conductivity above 300-325 K could be attributed to the semiconductor-semimetal transition, which will be discussed in the following section. Fig.…”