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On the Pinning of Spin‐Density Waves by Impurities
Author(s) -
Seidel Ch.
Publication year - 1988
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221490135
Subject(s) - condensed matter physics , bosonization , impurity , pinning force , lattice (music) , magnetic field , transverse plane , physics , materials science , critical current , quantum mechanics , superconductivity , fermion , structural engineering , acoustics , engineering
In a nonperturbative way, using the Bosonization technique the behaviour of longitudinal and transverse SDW's in a random field of impurities is studied. It is shown that magnetic as well as nonmagnetic species can pin SDW's. However, the pinning strength of nonmagnetic impurities is found to be essentially reduced compared to the CDW pinning. In contrast to this, locally strong pinning is expected to appear at kinks in the spin‐density phase. Thus, continuously changing the kink density by a magnetic field applied parallel to the easiest axis a significant enhancement of the pinning should be obtained when the period of kink lattice is commensurate with 2 k F , i.e., with the period of the superstructure.