Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Christian Illg"'
Publikováno v:
Journal of Superconductivity and Novel Magnetism. 30:1381-1387
When exciting a ferromagnetic film with a femtosecond optical laser pulse, then there is a partial demagnetization within a few hundred fs. This means that the angular momentum of the electronic system is transferred to the lattice. This transfer is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a01359d6c60bb495abda2988d8699ec
https://doi.org/10.1007/s10948-016-3950-z
https://doi.org/10.1007/s10948-016-3950-z
Publikováno v:
Physical Review B. 92
Transition matrix elements for electron-phonon scattering are discussed. The approximate expression for the matrix element derived by the combination of a phenomenological theory of electronic and ionic screening of the electron-electron interaction
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6914242a5a46592e7b5e999a2cb64deb
https://doi.org/10.1103/physrevb.92.195109
https://doi.org/10.1103/physrevb.92.195109
Autor:
Michael Haag, Haonan Huang, Weikai Weng, Johan Briones, Nicolas Teeny, Tilmann Kuhn, Manfred Fähnle, B. Y. Mueller, Lifa Zhang, Christian Illg, Theodoros Tsatsoulis
Publikováno v:
American Journal of Modern Physics. 7:68
When a magnetic film is excited by a femtosecond laser pulse, either with THz or with optical frequencies, then there is at least a partial demagnetization within a few hundred femtoseconds, followed by a remagnetization to the original state on a bi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e1c641dc10df9bc0240a2a860df995b
https://doi.org/10.11648/j.ajmp.20180702.12
https://doi.org/10.11648/j.ajmp.20180702.12
Scatterings of electrons at quasiparticles or photons are very important for many topics in solid state physics, e.g., spintronics, magnonics or photonics, and therefore a correct numerical treatment of these scatterings is very important. For a quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::768055bf611ad0b5d32e011de694103f
Publikováno v:
Springer Proceedings in Physics ISBN: 9783319077420
Electron-phonon scattering is one possible candidate to explain ultrafast demagnetization in Ni. We calculate the demagnetization time and the demagnetization rate with ab initio density-functional theory and estimate the phase space for scattering w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f86449f434fb20036ea6e7cb73a810f1
https://doi.org/10.1007/978-3-319-07743-7_42
https://doi.org/10.1007/978-3-319-07743-7_42
Publikováno v:
Physical Review B. 90
In a relativistic description of a real solid the crystal wave functions are never pure but spin-mixed functions. As a direct result of the spin-mixing, scattering mechanisms, which are in principal diagonal in spin-space, as for example the deformat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7786cc5d0c6d83ff70f2bd3b9213f712
https://doi.org/10.1103/physrevb.90.134410
https://doi.org/10.1103/physrevb.90.134410
Publikováno v:
Physical Review B. 90
Possible contributions of electron-magnon scatterings for the ultrafast demagnetization after femtosecond laser irradiation of films of Ni and Fe are investigated by the ab initio spin-density-functional electron theory. The calculations are based on
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3bce13cbb0d2af5f4905cac48c597b29
https://doi.org/10.1103/physrevb.90.014417
https://doi.org/10.1103/physrevb.90.014417
Publikováno v:
Journal of Magnetism and Magnetic Materials. 322:L5-L7
By making use of Kramer's degeneracy of the electronic states in a nonmagnetic material, Yafet has derived an expression for the spin relaxation time T 1 due to scattering of electrons at phonons which involves the properties of electronic and phonon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::733378b19614375312a8729c93d6bc6c
https://doi.org/10.1016/j.jmmm.2009.10.055
https://doi.org/10.1016/j.jmmm.2009.10.055
Publikováno v:
Physical Review B. 88
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c52896cd6548cd9ad1fb5735f14e455
https://doi.org/10.1103/physrevb.88.219905
https://doi.org/10.1103/physrevb.88.219905
Publikováno v:
Physical Review B. 88
Despite intensive research, the underlying mechanisms for ultrafast demagnetization after laser irradiation in transition metals are still not understood. We discuss the possible processes which have been suggested in order to explain the ultrafast d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7768dca014f014ad56c593b2debb4593
https://doi.org/10.1103/physrevb.88.214404
https://doi.org/10.1103/physrevb.88.214404