
Ð’ рамках данной работы был разработана методика коÑвенного Ð¾Ð¿Ñ€ÐµÐ´ÐµÐ»ÐµÐ½Ð¸Ñ Ñ‚ÐµÐ¼Ð¿ÐµÑ€Ð°Ñ‚ÑƒÑ€Ñ‹ роÑтовой поверхноÑти в процеÑÑе молекулÑрно-пучковой ÑпитакÑии. Детальны анализ температур реконÑтрукционных переходов, иÑÑледованных при различных уÑловиÑÑ… МПРна поверхноÑти GaAs in situ методом дифракции быÑтрых Ñлектронов на отражение, а также температур, определÑемых Ñ Ð¿Ð¾Ð¼Ð¾Ñ‰ÑŒÑŽ термопары и ИК-пирометра, показывает, что разница между реальными (TS) и измерÑемыми (TTC, TPIR) значениÑми температур Ð´Ð»Ñ Ð¿Ð¾Ð´Ð»Ð¾Ð¶ÐµÐº GaAs(001) и GaAs(111)B может доÑтигать ~100–120°С. Ð’ работе опиÑываетÑÑ Ð½Ð°Ð±Ð¾Ñ€ реперных точек, которые могут быть иÑпользованы при Ñоздании калибровочных завиÑимоÑтей TTC/TPIR и TS как функции мощноÑти РТС нагревателÑ. ИÑÑледование реконÑтрукционных переходов на поверхноÑти полуизолирующей подложки GaAs(111)B позволило определить, что температура реконÑтрукционного перехода между ÑоÑтоÑниÑми (2×2) и (√19×√19)R23.4° находитÑÑ Ð² диапазоне ТS = 540–550°С при динамичеÑком режиме ÑпуÑка температуры подложки Ñо ÑкороÑтью 15 °C/мин и потоке As РВЕР= 10-5 Па.
This thesis is devoted to developing of a method of the indirect temperature determination during the MBE growth. A detailed analysis of reconstruction transitions studied under various MBE conditions on the GaAs surface by reflection high-energy electron diffraction (RHEED) technique, as well as the MBE temperatures determined using a thermocouple and an IR pyrometer, shows that the difference between the real (TS) and measured (TTC, TPIR) temperature scan reach ~100–120°C for GaAs(001) and GaAs(111) B substrates. The developed method describes a set of reference points that can be used to create the calibration curves TTC/TPIR and TS as a function of the PTC heater power. The study of reconstruction transitions on the surface of a undoped GaAs(111)B substrate made it possible to determine that the temperature of the reconstruction transition between the (2×2) and (√19×√19)R23.4° states is in the range ТS = 540–550°С at the dynamic mode of decreasing the substrate temperature at a rate of 15°C/min and a As flux of РВЕР= 10-5 Pa.
ÑеконÑÑÑÑкÑионнÑе ÑоÑÑоÑниÑ, reconstruction, molecular beam epitaxy, молекÑлÑÑно-пÑÑÐºÐ¾Ð²Ð°Ñ ÑпиÑакÑиÑ, ÐÐ-пиÑомеÑÑ, GaAs, ÑеконÑÑÑÑкÑионнÑе пеÑÐµÑ Ð¾Ð´Ñ, ÑеÑмопаÑа, pyrometer, reconstruction modifications, reflection high-energy electron diffraction, диÑÑакÑÐ¸Ñ Ð±ÑÑÑÑÑÑ ÑлекÑÑонов, thermocouple
ÑеконÑÑÑÑкÑионнÑе ÑоÑÑоÑниÑ, reconstruction, molecular beam epitaxy, молекÑлÑÑно-пÑÑÐºÐ¾Ð²Ð°Ñ ÑпиÑакÑиÑ, ÐÐ-пиÑомеÑÑ, GaAs, ÑеконÑÑÑÑкÑионнÑе пеÑÐµÑ Ð¾Ð´Ñ, ÑеÑмопаÑа, pyrometer, reconstruction modifications, reflection high-energy electron diffraction, диÑÑакÑÐ¸Ñ Ð±ÑÑÑÑÑÑ ÑлекÑÑонов, thermocouple
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