Spin excitations of weakly coupled magnetic atoms
| العنوان: | Spin excitations of weakly coupled magnetic atoms |
|---|---|
| المؤلفون: | Fernando Flores, Edith Catalina Goldberg |
| المساهمون: | UAM. Departamento de Física Teórica de la Materia Condensada |
| المصدر: | Biblos-e Archivo. Repositorio Institucional de la UAM instname CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| بيانات النشر: | American Physical Society, 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Green’s functions, Spin states, Ciencias Físicas, Electron, Kondo, purl.org/becyt/ford/1 [https], symbols.namesake, Inelastic Tunneling, Inelastic electron, Spin (physics), Basis set, Physics, Zeeman effect, Spins, Física, Exchange Coupling, purl.org/becyt/ford/1.3 [https], Condensed Matter Physics, Coupling (probability), Electronic, Optical and Magnetic Materials, Kondo resonance, Weakly coupled Co/ Fe, symbols, Atomic physics, Magnetic atoms, Hamiltonian (quantum mechanics), CIENCIAS NATURALES Y EXACTAS, Física de los Materiales Condensados |
| الوصف: | A theoretical description of the measured differential conductance through magnetic atoms on a Cu2N/Cu(100) substrate is presented [Otte et al., Phys. Rev. Lett. 103, 107203 (2009)]. In particular, we analyze the case of a weakly coupled Co/ Fe dimer. The starting point of our model is an ionic Hamiltonian which describes the inelastic electron tunneling excitations and the Kondo resonances as due to atomic spin fluctuations associated with electron cotunneling processes in the tip-atom-surface system. The interaction terms of this Hamiltonian are written in the basis set of the eigenstates of the atomic part, which in the present case includes the crystalline and Zeeman fields and also, a Heisenberg exchange coupling between the two spins. The appropriate Green’s functions that define the differential conductance spectra are calculated by means of the equation-of-motion method.We obtain, in this form, a very satisfactory description of the overall experimental findings related to the behavior of the spin state excitations and Kondo resonance structures in the presence of an applied magnetic field E.C.G. acknowledges financial support by ANPCyT through Grant No. PICT-2010-0294, CONICET through Grant No. PIP-201101-00621, and U.N.L. through CAI+D grants. F.F. has been supported by the Spanish MICIIN under Contract No. FIS2010-16046 |
| وصف الملف: | application/pdf |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06968c5c598069a881b1f137f10f1448 http://hdl.handle.net/10486/672661 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....06968c5c598069a881b1f137f10f1448 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |