摘要:

AbstractA general effective Hamiltonian formalism is proposed and applied to the phenomenological description of energetic structure of aggregates consisting of several exchange‐bonded paramagnetic ions in a crystalline environment. The low‐lying energetic multiplets of such a system, resulting from isotropic exchange (superexchange) interaction, split under the further interactions and, for a variety of ions, can be described in terms of effective spin Hamiltonians. Such a description is highly useful from the electron paramagnetic resonance point of view, in which the transitions inside multiplets are observed. The microscopic model for the phenomenologic constants of these Hamiltonians is given in the second order of perturbation treatment, and the case of ions with orbitally nondegenerate ground crystal term is discussed in some det

ISSN:0370-1972    

DOI:10.1002/pssb.2220550145

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY

摘要:

AbstractThe results of EPR measurements are presented of mixed crystals ZnmHg1−mTe and ZnwHg1−wSe doped with Mn2+. The spectroscopic splitting factor g and the hyperfine structure constant A were determined as a function of the composition of the crystals investigated and measurements are made of electrical conductivity and electron concentrat

ISSN:0370-1972    

DOI:10.1002/pssb.2220550146

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY

摘要:

AbstractThe influence of linear vibronic coupling on a charge carrier generation resulting from exciton‐exciton scattering is investigated. It is shown that the possibility of dissociation of two excitons into an electron and a hole exists with simultaneous creation of intramolecular phonons. The probability of these processes increases with temperature with an activation energy equal to the intramolecular vibrational quantum. The case of anthracene crystal is discusse

ISSN:0370-1972    

DOI:10.1002/pssb.2220550147

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY

摘要:

AbstractThe anisotropy and the magnetic field dependences of ϱ⟂H/ϱ0were investigated on n‐Ge (ne≈ 1.59 × 1013 × m−3cm−3) in the range of dominant phonon scattering (at 77 °K) in quantizing magnetic fields (up to 250 kOe). The developed theory is in quantitative accordance with the experimental data. It is shown that: the difference of magnetic field dependences ϱ⟂/H/ϱ0= f(H) for H ‖ [001] or [011](both atj‖ [100] and atj‖ [110]) is caused by the effect of intervalley redistribution of current carriers in quantizing H; the crystal imperfections (type of Herring statistically distributed inhomogenities) do not reveal itself notice

ISSN:0370-1972    

DOI:10.1002/pssb.2220550148

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY

ISSN:0370-1972    

DOI:10.1002/pssb.2220550150

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY

ISSN:0370-1972    

DOI:10.1002/pssb.2220550101

出版商:WILEY‐VCH Verlag    

年代:1973

数据来源: WILEY