Zobrazeno 1 - 10
of 47
pro vyhledávání: '"R. Scheuerer"'
Autor:
G. Ramian, R. Scheuerer, Karl Friedrich Renk, Kirill N. Alekseev, A.E. Zhukov, Ekkehard Schomburg, A.R. Kovsh, V. Ustinov, S. J. Allen, Florian Klappenberger, J. S. Scott
Publikováno v:
The European Physical Journal B. 39:483-489
We report an experimental study indicating ultrafast creation and annihilation of space-charge domains in a semiconductor superlattice under the action of a THz field. Our experiment was performed for an InGaAs/InAlAs superlattice with the conduction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbe0a2c579a448b0684ff2f0bf3d500c
https://doi.org/10.1140/epjb/e2004-00221-y
https://doi.org/10.1140/epjb/e2004-00221-y
Publikováno v:
Journal of Applied Physics. 92:6043-6046
We studied the effects caused by Joule heating in GaAs/AlAs superlattices. We measured the current–voltage characteristics of superlattice mesas of different cross sections. Each current–voltage characteristic showed a corresponding peak current
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1923ca0e4906cd874cf5ed87fafb3251
https://doi.org/10.1063/1.1510567
https://doi.org/10.1063/1.1510567
Autor:
P. C. Main, Amalia Patanè, Karl Friedrich Renk, A. Ignatov, R. Scheuerer, Mohamed Henini, Laurence Eaves, Ekkehard Schomburg
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 13:786-789
We study electron miniband magneto-transport in GaAs/AlAs superlattices with AlAs barriers of two monolayers. Here, the two-dimensional AlAs barrier comprises an in-plane distribution of AlAs islands. We use magneto-transport to probe both the rate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7605c86dc48882f48fec2e05569ef06d
https://doi.org/10.1016/s1386-9477(02)00283-7
https://doi.org/10.1016/s1386-9477(02)00283-7
Autor:
Karl Friedrich Renk, A. R. Kovsh, Ekkehard Schomburg, Florian Klappenberger, A Vollnhals, A. E. Zhukov, R. Scheuerer, V. M. Ustinov, M. Kratschmer
Publikováno v:
Physica E: Low-dimensional Systems and Nanostructures. 13:912-915
We report the use of an InGaAs/InAlAs superlattice for detection of THz radiation pulses generated by a free-electron-laser (FELIX). The detector showed a response corresponding to a reduction of the direct current through the superlattice. The curre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5d99a6c7f210aa8147b36b5fb1ad4f5
https://doi.org/10.1016/s1386-9477(02)00233-3
https://doi.org/10.1016/s1386-9477(02)00233-3
Publikováno v:
Journal of Electron Spectroscopy and Related Phenomena. 75:161-173
We have analysed the core-to-bound excitations in condensed NH 3 and CH 4 in the N1s and C1s regions, respectively, utilizing highly resolved synchrotron radiation. Photoabsorption (from partial electron yields) and photodesorption of H + ions as fun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78dc75ed993555cac9673737437690d2
https://doi.org/10.1016/0368-2048(95)02524-3
https://doi.org/10.1016/0368-2048(95)02524-3
Autor:
M. Haeussler, Karl Friedrich Renk, Yu. Koschurinov, R. Scheuerer, Nikolay A. Maleev, A.E. Zhukov, Ekkehard Schomburg, D.G. Pavel'ev, V. Ustinov
Publikováno v:
Applied Physics Letters. 82:2826-2828
We report on frequency multiplication of microwave radiation by propagating space-charge domains in a semiconductor superlattice; the domains were due to a negative differential mobility of miniband electrons. We irradiated an arrangement of two GaAs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60348ca7e53218db9195c81f783fe24d
https://doi.org/10.1063/1.1569999
https://doi.org/10.1063/1.1569999
Publikováno v:
Applied Physics Letters. 81:1515-1517
We discuss the feasibility of a semiconductor superlattice oscillator which exploits the quenching of propagating dipole domains for the generation of submillimeter waves. We studied the dynamics of electrons in a semiconductor superlattice by perfor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf1b7b0c21de609b39e367c3c46d268f
https://doi.org/10.1063/1.1500770
https://doi.org/10.1063/1.1500770
Publikováno v:
Applied Physics A Solids and Surfaces. 55:478-481
Photon stimulated desorption (PSD) spectra of ions (N+, N+2, and N2+) by N 1s → 1πg and N 1s → Rydberg level excitations have been recorded from solid nitrogen for different polarization and detection conditions, and compared with electron yield
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eeccd895e0abf23929183538099221bb
https://doi.org/10.1007/bf00348336
https://doi.org/10.1007/bf00348336
Publikováno v:
Solid State Communications. 80:773-776
Excitation of exciton pairs in the bulk and on the surface of solid Ar by single photon absorption are investigated via photon stimulated desorption of ions. For films of various thicknesses, line shapes and branching ratios into Ar+ and Ar2+ emissio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bbfbed5e66f23343931e228cad305fc
https://doi.org/10.1016/0038-1098(91)90906-c
https://doi.org/10.1016/0038-1098(91)90906-c
Autor:
A. Kovsch, A. E. Zhukov, Jörg Grenzer, S. Brandl, Karl Friedrich Renk, Yu. Koschurinov, P. S. Kop’ev, V. M. Ustinov, D.G. Pavel'ev, Ekkehard Schomburg, R. Scheuerer
Publikováno v:
Superlattices and Microstructures. 25:29-31
We observed a self-sustained current oscillation in an InGaAs/InAlAs superlattice at room temperature. The oscillation gave rise to microwave generation at a fundamental frequency around 2 GHz and higher harmonics. The power at the first harmonic was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7fe6432363099030cadb3d7047f5120d
https://doi.org/10.1006/spmi.1998.0608
https://doi.org/10.1006/spmi.1998.0608