Kohler rule

Splitting of the transport coefficients into the various contributions is, under certain circumstances, possible using the sum rules , although these rules can only be applied in rather limited cases. In the following we will discuss these sum rules, which are the Matthiessen rule, the Kohler rule and the Nordheim-Gorter rule. 

For the thermopower no such a simple relation as the Matthiessen rule exists. The main reason is that the thermopower (and also the Peltier effect) is a higher -order transport phenomenon. This can be seen from eq. (18), where the matrix element is the dominating quantity. However, it can be shown that within the scope of the variational procedure, if the variational space is two dimensional, the so-called Kohler rule follows, which is ... 

The Kohler rule or the Nordheim-Gorter rule can be used in the same way as the Matthiessen rule to separate the different contributions to the total thermopower S. ... 

Although it is evident that the theory of the magnetoresistance is complicated, there exists one rule which appears to be obeyed in many cases. This is the Kohler rule ... 

We come now to the transport properties of LaSn3. The temperature variation of the electrical resistivity is given in fig. 80. The inset in fig. 80 shows that the Kohler rule (eq. (67)) is valid for LaSn3 over a wide temperature and field range. This is an... 

Deserves your attention. MOs are given on p. 268 Justify Kohler s empirical rule. 

In the band picture outlined in Section III.B, the effect of a magnetic field on the electrical resistivity (p) is to give an increase (Ap = p - p0) that obeys Kohler s rule (KR) [35,100], namely ... 

This combining rule was derived in a different manner by Kohler (3). 

In spontaneous reporting, as a rule, suspected unusual and severe adverse effects of newly marketed drugs are given priority. In this situation, the number of patients exposed to the suspected drug is usually unknown or can only be estimated (Dunne 1978 Finney 1974 Kohler and Kimbel 1978 Maronde et al. 1978 WHO 1969). 

It states that the deflection of a carrier is proportional to the product of the magnetic field and the time between collisions. Deviations from Kohler s rule are evidence that different types of scattering mechanisms have different effects on different groups of carriers. 

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