Transport Phenomena in Strongly Correlated Fermi Liquids by Hiroshi Kontani

Author:Hiroshi Kontani
Language: eng
Format: epub
Publisher: Springer Berlin Heidelberg, Berlin, Heidelberg

(6.4)

where the kernel function is , and represents the -matrix defined in Eq. (6.1). The detailed method of calculation is explained in Ref. [24].

As shown in Figs. 5.3a and 5.6a, both and start to decrease below (160 K), consistently with experiments [28–30]. Figure 5.2a shows the resistivity given by the FLEX approximation and the -matrix approximation, both of which are given by including CVCs. As pointed out in Ref. [33], given by the FLEXCVC method shows a tiny “kink” structure at , actually observed in LSCO [34] and YBCO [35]. In addition, large kink structure appears at in the [-matrix]CVC method, since the inelastic scattering is reduced by the formation of the strong pseudo-gap. As shown in Fig. 6.1d, Im decreases quickly below , in accordance with the emergence of Im. As a result, below . To summarize, , and are suppressed in the pseudo-gap region.

Fig. 6.2 a for LSCO in the [-matrix]CVC; The modified Kohler’s rule holds above . Below K, modified Kohler’s rule is violated since increases quite drastically that is caused by the CVC due to AFSC fluctuations. b for LSCO in the [FLEX-matrix]CVC; the abrupt increase in below is caused by the CVC due to AFSC fluctuations. Experimental data is cited from [38–40]. c for NCCO obtained by the FLEXCVC approximation. Experimental data is cited from [41]. (Reference [42])

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