Novel phases of planar fermionic systems

G. Murthy, R. Shankar

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


We discuss a family of planar (two-dimensional) systems with the following phase structure: a Fermi liquid, which goes via a second-order transition (with a nonclassical exponent even in the mean field) to an intermediate, inhomogeneous state (with nonstandard ordering momentum), which in turn goes via a first-order transition to a state with a canonical order parameter. We analyse two examples: (i) a superconductor in a parallel magnetic field for which the inhomogeneous state is obtained for 1.86Tc<or approximately=B<or approximately=1.86 square root 2Tc, where Tc is the critical temperature (in kelvin) of the superconductor without a field and B is measured in tesla; and (ii) spinless (or spin-polarized) fermions near half-filling where a similar, sizeable window (which grows in size with anisotropy) exists for the intermediate CDW phase at a momentum different from ( pi , pi ). We discuss the experimental conditions for realizing and observing these phases and the renormalization group approach to the transitions.

Original languageEnglish
Article number007
Pages (from-to)9155-9171
Number of pages17
JournalJournal of Physics Condensed Matter
Issue number48
StatePublished - 1995

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics


Dive into the research topics of 'Novel phases of planar fermionic systems'. Together they form a unique fingerprint.

Cite this