The influence of an oscillatory chemical potential ̃ \~μ within the gap equation of a commensurate charge-density wave (CDW) is shown to lead to a new type of quantum oscillatory effect in the susceptibility of the nested one-dimensional sheets, with frequency exactly double that of the two-dimensional pocket from which oscillations in ̃ \~μ originate. On approaching the Pauli paramagnetic limit, ̃ \~μ further leads to a cascade of multiple first-order phase transitions between CDW and normal metallic phases. These ideas are applied to α-(BEDT-TTF)₂MHg(SCN)₄ charge-transfer salts.
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N. Harrison (1999) studied this question.
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