Nov 19, 2002
Hot and cold spots of the electron relaxation time in Q1D organic conductors and in curates
Victor Yakovenko, University of Maryland
Electronic transport properties are discussed using a model where the
electron relaxation time strongly varies around the Fermi surface. For Q1D
conductors, we calculate the distribution of the umklapp relaxation time and
find the so-called "hot spots" at low temperatures. This model produces
good quantitative fits of the temperature dependence of resistivity and Hall
coefficient in the organic conductor (TMTSF)2PF6. For cuprates, a
phenomenological model with "cold spots" at the Brillouin zone diagonals is
useful for describing dc and ac magnetotranspot, such as Hall effect.
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