![]() The presence of a spin-orbit interaction manifested as weak antilocalization in the p-type epilayer suggests that these structures could be developed for use in spintronic devices such as the spin-FET, where significant spin lifetimes would be important for efficient device operation. In the p-type device, the measured spin diffusion length does not change over the range of temperatures for which weak antilocalization can be observed. The decay of the phase coherence length with temperature is found to obey the same power law of lϕ ∝ Tc, where c = −0.68 ± 0.03, for each device, in spite of the clear differences in the nature of the conduction. Magnetoresistance measurements performed on a reactively DC-sputtered thin film at low temperatures (T < 8 K) suggest a 2D weak antilocalization. We obtain phase coherence lengths as large as 325 nm in the highly doped n-type device, presenting possible applications in quantum technologies. From fits to these data using the Hikami-Larkin-Nagaoka model, the phase coherence length of each device is extracted, as well as the spin diffusion length of the p-type device. Both n- and p-type devices show quantum corrections to the conductivity in an applied magnetic field, with n-type devices displaying weak localization and p-type devices showing weak antilocalization. The phase-coherence length extracted from the measured weak antilocalization characteristics shows a strong power-law increase with decreasing temperature and. Users should refer to the original published version of the material for the full abstract.The magnetoresistance of 50 nm thick epilayers of doped germanium is measured at a range of temperatures down to 1.6 K. No warranty is given about the accuracy of the copy. In the presence of strong intervalley scattering and correlations, we expect a crossover from the weak antilocalization to weak localization. However, users may print, download, or email articles for individual use. The weak antilocalization always dominates the magnetoconductivity near zero field, thus gives one of the transport signatures for Weyl semimetals. The temperature dependence of the dephasing rate is consistent with the Nyquist mechanism. Phase coherence time and zero-field spin-splitting are extracted following Golub’s model L. Copyright of Scientific Reports is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. At weak magnetic fields, the weak antilocalization effect in the ballistic regime is observed.This work offers insights for understanding quantum electrical transport phenomena and their underlying physics, particularly when multiple WAL length scales are competing. Weak Antilocalization Effect and Noncentrosymmetric Superconductivity in a Topologically Nontrivial Semimetal LuPdBi. 1012 These phenomena are affected by the phase-coherence length, l, defined as the length where phase-coher. The present theory describes both low-T and high-T regions successfully, which is impossible in the previous approximate approach. For a mesoscopic system with disorder and strong spin-orbit coupling, the phase coherent magneto-transport at low temperatures result in the appearance of weak antilocalization (WAL) and universal conductance fluctuations (UCF) effects. Accordingly, the hallmark features of weak antilocalization (WAL) in ρ xx B and ρ xy B are gradually suppressed across the crossover with increasing T. Because of the different T dependence, a crossover occurs from the lSO-dominant low-T to the lϕ-dominant high-T regions. Weak antilocalization signatures observed at low temperatures provided information on spin-orbit scattering length ranging from 20 to 30 nm, elastic scattering length of approx. In contrast, the lSO shows negligible T dependence. ![]() The lϕ has a power-law T dependence at high T and saturates at low T. weak anti-localization and reflect-less tunneling, etc. The present framework not only explains the main features of the experimental data but also enables one to estimate lϕ and lSO at different temperatures. topological phase of quantum matter with earlier representative examples such as the 5/2. Based on the new approach, the ρ xx B and ρ xy B of the Dirac semimetal Bi0.97Sb0.03 was analyzed over a wide T range from 1.7 to 300 K. (Phys Rev B 100:125162, 2019), which assumes infinite phase coherence length (lϕ) and a zero spin–orbit scattering length (lSO), the present framework is more general, covering high T and the intermediate spin–orbit coupling strength. Compared to the previous approach Vu et al. Abstract: The present study develops a general framework for weak antilocalization (WAL) in a three-dimensional (3D) system, which can be applied for a consistent description of longitudinal resistivity ρ xx B and Hall resistivity ρ xy B over a wide temperature (T) range. ![]()
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