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NMR study of the charge‐density‐wave state in VSe 2
Author(s) -
Skripov A. V.,
Stepanov A. P.,
Shevchenko A. D.,
Kovalyuk Z. D.
Publication year - 1983
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.2221190146
Subject(s) - knight shift , condensed matter physics , charge density wave , quadrupole , chemistry , amplitude , magnetic susceptibility , spin–lattice relaxation , electric field gradient , relaxation (psychology) , atmospheric temperature range , coupling constant , fermi contact interaction , nuclear quadrupole resonance , atomic physics , physics , superconductivity , paramagnetism , psychology , social psychology , quantum mechanics , particle physics , meteorology
The 51 V NMR lineshape, Knight shift, quadrupole interaction, spin—lattice relaxation time and magnetic susceptibility in a single‐crystalline VSe 2 are studied in the temperature range 4.2 to 300 K. Above the charge‐density‐wave (CDW) onset temperature T 0 ≈ 110 K the linear temperature dependence of the quadrupole coupling constant and the pretransitional line broadening are found. The temperature dependence of the CDW amplitude is determined from the width of electric‐field‐gradient distribution at nuclear sites below T 0 . Combining the experimental data on NMR properties and magnetic susceptibility the effective electron—electron interaction parameter, J = 0.29 eV, is estimated and the density of electron states at the Fermi level. The latter is found to decrease from 2.05 to 1.60 states/eV spin V at the phase transition into the CDW state.