Persistent currents in a Peierls insulator
Department of Applied Physics and Delft Institute for
and Submicron Technology (DIMES),
Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
Accepted: 24 October 1996
Mesoscopic rings with an incommensurate charge density wave (CDW) ground state are investigated theoretically. It is found that the magnetic flux has a pronounced effect on the amplitude of the CDW order parameter. Self-consistent calculations predict a periodic modulation of the order parameter as a function of the flux. In sufficiently small rings the magnetic field can even destroy the CDW ground state. The flux-induced phase transition affects the persistent current and should be observable in the magnetic response.
PACS: 71.45.Lr – Charge-density-wave systems / 03.65.Bz – Foundations, theory of measurement, miscellaneous theories (including Aha ro nov-Bohm effect, Bell inequalities, Berry's phase)
© EDP Sciences, 1996