35 research outputs found
Semiconductors V. 38, I. 07
No full textSemiconductors -- July 2004
Volume 38, Issue 7, pp. 737-861
ATOMIC STRUCTURE AND NONELECTRONIC PROPERTIES OF SEMICONDUCTORS
Interphase Interactions and Features of Structural Relaxation in TiBx–n-GaAs (InP, GaP, 6H-SiC) Contacts Subjected to Active Treatment
N. S. Boltovets, V. N. Ivanov, R. V. Konakova, Ya. Ya. Kudrik, O. S. Litvin, P. M. Litvin, and V. V. Milenin
pp. 737-741 Full Text: PDF (392 kB)
Local Symmetry of the Pb1 – xSnxSe Lattice near the Zero-Gap State
E. S. Khuzhakulov
pp. 742-744 Full Text: PDF (54 kB)
Promotion of Metallurgical Reactions at the Ni–SiC Interface by Irradiation with Protons
V. V. Kozlovskii, P. A. Ivanov, D. S. Rumyantsev, V. N. Lomasov, and T. P. Samsonova
pp. 745-750 Full Text: PDF (75 kB)
ELECTRONIC AND OPTICAL PROPERTIES OF SEMICONDUCTORS
Study of the Electrical Properties of CdxHg1 – xTe
P. V. Biryulin, V. I. Kosheleva, and V. I. Turinov
pp. 751-757 Full Text: PDF (98 kB)
Formation of Electrically Active Centers in Silicon Irradiated with Electrons and Then Annealed at Temperatures of 400–700°C
E. P. Neustroev, S. A. Smagulova, I. V. Antonova, and L. N. Safronov
pp. 758-762 Full Text: PDF (64 kB)
The Role of Trapping Levels of Nonequilibrium Electrons during the Formation of Pinning Centers for Domain Walls in the Magnetic Semiconductor CdCr2Se4
A. A. Abdullaev
pp. 763-768 Full Text: PDF (78 kB)
Electrical Properties and Limiting Position of the Fermi Level in InSb Irradiated with Protons
V. N. Brudnyi, V. M. Boiko, I. V. Kamenskaya, and N. G. Kolin
pp. 769-774 Full Text: PDF (97 kB)
Anomalous Solubility of Implanted Nitrogen in Heavily Boron-Doped Silicon
D. I. Tetelbaum, E. I. Zorin[dagger], and N. V. Lisenkova
pp. 775-777 Full Text: PDF (35 kB)
Specific Thermoelectric Properties of Lightly Doped Bi2(TeSe)3 Solid Solutions
P. P. Konstantinov, L. V. Prokof'eva, Yu. I. Ravich, M. I. Fedorov, and V. V. Kompaniets
pp. 778-781 Full Text: PDF (63 kB)
Specific Features of Electron Spin Resonance in 4H-SiC in the Vicinity of the Insulator–Metal Phase Transition: II. Analysis of the Width and Shape of Lines
A. I. Veinger, A. G. Zabrodskii, T. V. Tisnek, and E. N. Mokhov
pp. 782-787 Full Text: PDF (83 kB)
Localization of a Longitudinal Autosoliton in InSb
I. K. Kamilov, A. A. Stepurenko, and A. S. Kovalev
pp. 788-790 Full Text: PDF (68 kB)
Piezospectroscopic Study of the Emission Band of n-GaAs:S Peaked at about 1.2 eV
A. A. Gutkin and M. A. Reshchikov
pp. 791-795 Full Text: PDF (67 kB)
Hysteresis in Ag2Te near and within the Phase Transition Region
S. A. Aliev
pp. 796-799 Full Text: PDF (60 kB)
SEMICONDUCTOR STRUCTURES, INTERFACES, AND SURFACES
Resistance of Proton-Irradiated GaAs Photodetectors to Combined Gamma and Neutron Radiation
A. V. Murel', S. V. Obolenskii, A. G. Fefelov, and E. V. Kiseleva
pp. 800-806 Full Text: PDF (83 kB)
Radiation Resistance of Transistor- and Diode-Type SiC Detectors Irradiated with 8-MeV Protons
N. B. Strokan, A. M. Ivanov, N. S. Savkina, A. A. Lebedev, V. V. Kozlovskii, M. Syvajarvi, and R. Yakimova
pp. 807-811 Full Text: PDF (77 kB)
LOW-DIMENSIONAL SYSTEMS
Nonlinear Properties of Phototropic Media on the Basis of CuxSe Nanoparticles in Quartz Glass
S. A. Zolotovskaya, N. N. Posnov, P. V. Prokosin, K. V. Yumashev, V. S. Gurin, and A. A. Alexeenko
pp. 812-817 Full Text: PDF (90 kB)
Radiative Recombination in Ge+-Implanted SiO2 Films Annealed under Hydrostatic Pressure
I. E. Tyschenko and L. Rebohle
pp. 818-823 Full Text: PDF (91 kB)
The Effect of Acoustic Phonon Confinement on Electron Scattering in GaAs/AlxGa1 – xAs Superlattices
S. I. Borisenko
pp. 824-829 Full Text: PDF (75 kB)
Kapitsa Effect in Crystals with Superlattices
P. V. Gorskii
pp. 830-832 Full Text: PDF (39 kB)
Optical and Structural Properties of InAs Quantum Dot Arrays Grown in an InxGa1 – xAs Matrix on a GaAs Substrate
N. V. Kryzhanovskaya, A. G. Gladyschev, S. A. Blokhin, Yu. G. Musikhin, A. E. Zhukov, M. V. Maksimov, N. D. Zakharov, A. F. Tsatsul'nikov, N. N. Ledentsov, P. Werner, F. Guffart, and D. Bimberg
pp. 833-836 Full Text: PDF (182 kB)
Mechanism of Dicke Superradiance in Semiconductor Heterostructures
L. Ya. Karachinsky, I. I. Novikov, N. Yu. Gordeev, and G. G. Zegrya
pp. 837-841 Full Text: PDF (66 kB)
Manifestation of Size-Related Quantum Oscillations of the Radiative Exciton Recombination Time in the Photoluminescence of Silicon Nanostructures
A. V. Sachenko, Yu. V. Kryuchenko, I. O. Sokolovskii, and O. M. Sreseli
pp. 842-848 Full Text: PDF (93 kB)
AMORPHOUS, VITREOUS, AND POROUS SEMICONDUCTORS
Ultraviolet Luminescence of ZnO Infiltrated into an Opal Matrix
V. M. Masalov, É. N. Samarov, G. I. Volkodav[dagger], G. A. Emel'chenko, A. V. Bazhenov, S. I. Bozhko, I. A. Karpov, A. N. Gruzintsev, and E. E. Yakimov
pp. 849-854 Full Text: PDF (98 kB)
PHYSICS OF SEMICONDUCTOR DEVICES
Leakage Currents over the Surface of CdHgTe-Based Photodiodes
P. V. Biryulin, V. I. Turinov, and E. B. Yakimov
pp. 855-861 Full Text: PDF (162 kB)Archived web conten
THREE-DIMENSIONAL LIGHT BULLETS IN CUBIC–QUINTIC MEDIA STABILIZED BY PERIODIC VARIATION OF DIFFRACTION AND DISPERSION
No full text We propose a dispersion-managed model with diffraction management for the stabilization of three-dimensional spatiotemporal solitons in bulk cubic–quintic media. The cubic–quintic nonlinear Schrödinger equation with periodically varying dispersion and diffraction has been studied using analytical and numerical methods. Variational analysis and the Kapitsa averaging method have been used to study the system analytically. The study has shown that periodically varying coefficients of diffraction and dispersion stabilizes the spatiotemporal solitons in cubic–quintic media. </jats:p
Кто «открыл» озеро Восток?
Get PDFA history of the subglacial lake Vostok that had been revealed near this Soviet Antarctic Station is briefly described in the paper. Three participants of the Soviet Antarctic Expeditions played a significant part in the history of the Lake discovery, and they were a navigator of polar aviation R.V. Robinson, a physicist I.A. Zotikov, and a geographer A.P. Kapitsa. R.V. Robinson was the first man who had indicated to evidence of a subglacial lake in contours of the glacier surface; I.A. Zotikov had substantiated a hypothesis of a subglacial melting in central regions of the Antarctic continent and possible presence of water bodies in depressions of the glacier bed; A.P. Kapitsa had obtained by means of seismic sounding the original reflections which were later interpreted as reflections from subglacial water layer. And lastly, in some time later, the Britain glaciologist G. Robin had performed the thorough radio sounding in the vicinity of the Vostok station and finally proved existence of a large subglacial water body in this region. Further on, the lake was investigated by many participants of the Russian Antarctic Expeditions, as well as by scientists from the Britain Scott Institute and members of the American Antarctic Expeditions. Now this is the largest and the mostly studied subglacial lake in the Antarctica among almost 400 similar lakes revealed under the ice sheet.Изложена история открытия подледникового озера Восток, обнаруженного в районе одноимённой советской антарктической станции. В истории открытия озера главное значение имеют три имени участников советских антарктических экспедиций: штурмана полярной авиации Р.В. Робинсона, физика И.А. Зотикова и географа А.П. Капицы. Дальнейшие исследования озера выполнены многими участниками Российских антарктических экспедиций, учёными Британского полярного института имени Р. Скотта и членами американских антарктических экспедиций. Сейчас это самое крупное и наиболее изученное подледниковое озеро в Антарктиде из почти 400 таких же озёр, обнаруженных под ледниковым щитом
Is Vostok lake in steady state?
Get PDFStable-isotope (D and 18O) data from the Vostok (East Antarctica) ice core are used to explore whether or not subglacial Vostok lake is in isotopic steady state. A simple box model shows that the lake is likely to be in steady state on time-scales of the order of 104–105 years (three to four residence times of the water in the lake), given our current knowledge of north–south and east–west gradients in the stable-isotopic composition of precipitation in the vicinity of Vostok station and Ridge B. However, the lake may not be in perfect steady state depending on the precise location of the melting area, which determines the source region of inflowing ice, and on the magnitude of the east–west gradient in isotopic compositions in the vicinity of Vostok station and Ridge B
Evidence of 14 New Subglacial Lakes in the Dome C-Vostok Area
No full textIn the last few years subglacial lakes have been of great interest to the scientific community for various reasons. The lakes could be an unknown extreme habitat, which have been isolated from the terrestrial biosphere for a long time. They may have formed before the ice sheet and could perhaps reveal environmental conditions prior to its formation. Lastly, they may play a role in the current dynamics of the ice sheet. Strong radar reflections from the base of the ice sheet can generally be ascribed to either
water-saturated basal sediments or subglacial lakes (Oswald & Robin, 1973). Based on radar
data alone, the identification of lakes is possible if other features are present: flat and quite horizontal reflectors with nearly constant echo intensity and sharp edges similar to the margins of a catchment basin (Siegert et al., 1996; Siegert & Ridley, 1998; German & Siegert, 1999; Siegert, 2000; Tabacco et al., 2002). Subglacial lakes can be expressed in the overlying ice sheet as extremely flat surfaces with respect to the surrounding slopes (Ridley et al., 1993; Kapitsa et &l996 ; Siegert & Ridley,1998; Tabacco et al., 2002). To date, about 70 lakes have been discovered in all of Antarctica (Siegert et al.,1996); 21 of these are located in the Dome C-Vostok region.PublishedMilan, 25-26 June 2002 / Dipartimento di Scienze Ambiente e Territorio (DISAT), Università di Milano Bicocca, P.zza della Scienza 1, 20126 Milano3.8. Geofisica per l'ambienteope
Evidence of 14 New Subglacial Lakes in the Dome C-Vostok Area
No full textIn the last few years subglacial lakes have been of great interest to the scientific community for various reasons. The lakes could be an unknown extreme habitat, which have been isolated from the terrestrial biosphere for a long time. They may have formed before the ice sheet and could perhaps reveal environmental conditions prior to its formation. Lastly, they may play a role in the current dynamics of the ice sheet. Strong radar reflections from the base of the ice sheet can generally be ascribed to either
water-saturated basal sediments or subglacial lakes (Oswald & Robin, 1973). Based on radar
data alone, the identification of lakes is possible if other features are present: flat and quite horizontal reflectors with nearly constant echo intensity and sharp edges similar to the margins of a catchment basin (Siegert et al., 1996; Siegert & Ridley, 1998; German & Siegert, 1999; Siegert, 2000; Tabacco et al., 2002). Subglacial lakes can be expressed in the overlying ice sheet as extremely flat surfaces with respect to the surrounding slopes (Ridley et al., 1993; Kapitsa et &l996 ; Siegert & Ridley,1998; Tabacco et al., 2002). To date, about 70 lakes have been discovered in all of Antarctica (Siegert et al.,1996); 21 of these are located in the Dome C-Vostok region.PublishedMilan, 25-26 June 2002 / Dipartimento di Scienze Ambiente e Territorio (DISAT), Università di Milano Bicocca, P.zza della Scienza 1, 20126 Milano3.8. Geofisica per l'ambienteope
Glacial debris flows in Zailiysky Alatau over the past 120 years
Get PDFZailiyskiy Alatau is the most mudflow hazardous mountain region of the Republic of Kazakhstan. At the same time, this area is one of the most densely populated and economically developed one, so mudflows here cause the great damage. The paper presents results of our analysis of the glacial mudflow activity for the period from 1900 to 2019. Amount and total volume of glacial mudflows per year were used as indicators of the mudflow activity. 481 mudflows were recorded over 120 years of observations in the Zailiyskiy Alatau, and 24% of them were glacial mudflows. Glacial mudflows are the largest and most destructive. Of the nine mudflows with a volume of more than 1 million m3, seven were glacial mudflows. The chronicle of mudflow disasters is shown. From 1950 to 2019, 87 glacial mudflows were observed in the Zailiyskiy Alatau. Of these, 16 mudflows had volumes exceeding 100 thousand m3. The largest ones occurred in 1977 (6.0 million m3), 1963 (5.8 million m3), 1958 (4.0 million m3), and 1973 (3.8 million m3 ). The causes for formation of glacial mudflows are outbursts of moraine lakes or water from underground reservoirs, as well as collapses of moraines’ slopes. The largest of them occur when a lake is bursting through an open channel. Since 1951, occurrence of glacial mudflows has been increasing and reached its maximum in the 1970s. Since 1978, the number of glacial mudflows has been decreasing, although their volumes remained large until the late 1990s. From 1997 to 2013, mudflow activity was low. During 11 of the 15 years, no mudflow was observed. Every year only one mudflow happened with a volume below 10 thousand m3. Since 2014, there has been a tendency for an increase in mudflow activity. Large glacial mudflows were recorded in 2014 and 2019. To protect against mudflows in the valleys of the Zailiysky Alatau, 14 dams have been built and two more are planned. To prevent outbursts of moraine lakes, they are emptied using pumps and siphons. In 2019, the network of automated monitoring of early warning about mudflows is being organized, which will cover all the valleys of the Northern slope of the Zailiysky Alatau
On the influence of rock glacier dynamics on the runoff in basin of the Ulken Almaty (Bolshaya Almatinka) River, Northern Tien Shan
No full textThe purpose of the work was to study the dynamics of mountain stone glaciers and streams flowing down from them for an understanding their hydrological significance. Two glaciers: Morenny and Gorodetsky, were analyzed, both located in the river Ulken Almaty (Big Almatinka) basin, Northern Tien Shan. On the average, the rate of surface displacement of the Morennoye glacier is higher than that of the Gorodetsky, which is associated with increased ice content of the last one. The increase in rates of surface displacement of both stone glaciers revealed in 2021–2022 when compared to previous years turned out to be consistent with the widely discussed idea of intensification of such glaciers dynamics under the present-day climate changes and glacier retreats. It was found that the stone glaciers have a pronounced influence on the water regime, temperature and chemical composition of watercourses formed by water running out from them. They are distinguished by the almost complete absence of intraday fluctuations in the level, temperature, and specific electrical conductivity of water, which are more pronounced in rivers and streams with glacial alimentation during the summer time. Some waterflows from the Gorodetsky glacier do not freeze in winter, which is indicative of significant groundwater reserves in its body. The waters of each of the above stone glaciers differ in their characteristic mineralization, temperature, and the ratio of the major ions. The stable water flow from such glaciers can play an important role in maintaining a river runoff during periods of the low stream discharge
ОТЕЧЕСТВЕННЫЕ СЕЙСМИЧЕСКИЕ, РАДИОЛОКАЦИОННЫЕ И СЕЙСМОЛОГИЧЕСКИЕ ИССЛЕДОВАНИЯ ПОДЛЕДНИКОВОГО ОЗЕРА ВОСТОК, ВОСТОЧНАЯ АНТАРКТИДА
No full textThe results of the remote sensing which carried out in the LakeVostokarea are discussed in the paper. A.P. Kapitsa and O.G. Sorokhtin started the geophysical researches in this area in 1950s. Satellite altimetry data, which analyzed in 1990s yielded to the discovering of the LakeVostok. After that, PMGE and RAE started the systematic studying of this natural phenomenon by seismic and radio-echo sounding. Total, 318 seismic soundings and 5190 kmof the radio-echo profiles has been collected by 2008. Special precise measurements which carried out in the 5G-1 borehole vicinity are resulted in the ice thickness over Vostok Station is 3760±30 mby seismic and 3775±15 mby radio-echo sounding. Thus, the error of geophysical measurements is less than 0.3%. The Russian investigations are resulted in definition the border of the lake, the discovering of 56 subglacial water caves around the lake and compilation the maps including ice thickness, ice base and bedrock topography and the depth of the lake. Average depth of the LakeVostokis about 400 m; water volume is 6100 km3. After 2008, the remote sensing works have been concentrated to the studying of the bottom sediments by refraction seismic technique. The firsts result shown that the bottom sediments thickness varies from 400 to1200 m.Сделан обзор результатов дистанционных исследований подледникового оз. Восток. Установлено, что толщина ледника непосредственно в пункте бурения по сейсмическим данным составляет 3760±30 м, а по радиолокационным – 3775±15 м. Таким образом, погрешность измерений толщины ледника дистанционными методами составляет менее 0,3%. Толщина ледника в районе оз. Восток изменяется от 1950 до 4350 м. Средняя глубина озера – около 400 м, а объём воды в нём – 6100 км3. В пределах акватории озера обнаружено 11 островов, а вокруг озера выявлено 56 подледниковых водоёмов. Само оз. Восток представляет собой изолированную систему
