Electron energy relaxation under terahertz excitation in (Cd1−xZnx)3As2 Dirac semimetals

We demonstrate that measurements of the photo-electromagnetic effect using terahertz laser radiation provide an argument for the existence of highly conductive surface electron states with a spin texture in Dirac semimetals (Cd₁-xZnx)₃As

Comparative analysis of young students’ bioethical perceptions in teaching at medical university

This article reports find ings of the surveyof 274 students from the three following faculties of the Ural State Medical University: medical, pediatric and dentistry. The find ings show edandjustified the extent to which future doctors can use bioethical principles. The objectives of the study were to assess bioethics alperceptions and understanding of biomedical issues by students from different faculties of the university. Theresultsofthestudycanbeusedforeducationandmethodicaltrainingintheuniversity which will help to adapt the next generation of doctors to the modern cure model in practical health care environment.В статье представлены результаты анализа анкетирования 274 студентов трех факультетов УГМУ: лечебного, педиатрического и стоматологического. Анализ результатов позволил выявить и обосновать биоэтический уровень личностей будущего поколения врачей. Цель исследования – анализ биоэтического восприятия и уровня биомедицинского понимания среди обучающихся на разных факультетах университета. Результаты исследования могут быть применены при учебно-воспитательной и методической работе в университете, позволяя адаптировать поколение будущих врачей к современной модели врачевания в условиях практического здравоохранения

Синтез и магнетосопротивление кристаллов (Cd1−x Znx)3As2 (x = 0,007)

The vapor phase growth of Cd3As2—Zn3As2 (in the following (Cd1−x Znx)3As2 solid solutions process is described. The (Cd0,993 Zn0,007)3As2 solid solution single crystals were synthesized. Scanning electron microscopy and electron diffraction data suggest high crystalline quality of studied sample. Its structure and surface morphology, indicating the presence of growth nuclei and cleavage planes, were investigated. Giant anisotropic magnetoresistance and Shubnikov — de Haas oscillations were observed at low temperatures. Obtained results suggests that peculiarities of Dirac semimetal phase persist in (Cd1−x Znx)3As2 solid solution at low zinc content. At the same time, there are indications of some differences with initial Cd3As2 properties.Описана процедура синтеза твердых растворов Cd3As2—Zn3As2 (в дальнейшем, (Cd1−x Znx)3As2 из паровой фазы. Синтезированы монокристаллы твердого раствора (Cd0,993 Zn0,007)3As2. Результаты сканирующей электронной микроскопии и дифракции электронов свидетельствуют о высоком кристаллическом совершенстве изученного образца. Исследована его структура и морфология поверхности, содержащей ростовые зародыши и плоскости скола. В области низких температур выявлены гигантское анизотропное магнетосопротивление, а также осцилляции Шубникова—де Гааза. Полученные результаты указывают на сохранение особенностей фазы дираковского полуметалла для твердого раствора (Cd1−x Znx)3As2 с низким содержанием цинка. В то же время присутствуют указания на возможные отличия от свойств исходного материала Cd3As2

Electron energy relaxation under terahertz excitation in (Cd1−xZnx)3As2 Dirac semimetals

We demonstrate that measurements of the photo-electromagnetic effect using terahertz laser radiation provide an argument for the existence of highly conductive surface electron states with a spin texture in Dirac semimetals (Cd₁-xZnx)₃As

Electron energy relaxation in (Cd₁-xZnx)₃As₂ Dirac semimetals studied by terahertz laser pulses

We performed a study of a range of (Cd₁-xZnx)₃As₂ mixed crystals undergoing a transition from the Dirac semimetal phase to trivial semiconductor at variation of the composition x. We show that for the Dirac semimetal phase, the photoelectromagnetic effect amplitude is defined by the number of incident radiation quanta, whereas for the trivial semiconductor phase, it depends on the power in a laser pulse irrespective of its wavelengt

Electron energy relaxation in (Cd₁-xZnx)₃As₂ Dirac semimetals studied by terahertz laser pulses

We performed a study of a range of (Cd₁-xZnx)₃As₂ mixed crystals undergoing a transition from the Dirac semimetal phase to trivial semiconductor at variation of the composition x. We show that for the Dirac semimetal phase, the photoelectromagnetic effect amplitude is defined by the number of incident radiation quanta, whereas for the trivial semiconductor phase, it depends on the power in a laser pulse irrespective of its wavelengt

Electron energy relaxation under terahertz excitation in (Cd1− x Zn x )3As2 Dirac semimetals

We demonstrate that measurements of the photo-electromagnetic effect using terahertz laser radiation provide an argument for the existence of highly conductive surface electron states with a spin texture in Dirac semimetals (Cd1-xZnx)(3)As-2. We performed a study on a range of (Cd1-xZnx)(3)As-2 mixed crystals undergoing a transition from the Dirac semimetal phase with an inverse electron energy spectrum to trivial a semiconductor with a direct spectrum in the crystal bulk by varying the composition x. We show that for the Dirac semimetal phase, the photo-electromagnetic effect amplitude is defined by the number of incident radiation quanta, whereas for the trivial semiconductor phase, it depends on the laser pulse power, irrespective of wavelength. We assume that such behavior is attributed to a strong damping of the interelectron interaction in the Dirac semimetal phase compared to the trivial semiconductor, which may be due to the formation of surface electron states with a spin texture in Dirac semimetals