6533b820fe1ef96bd127a3cd
RESEARCH PRODUCT
Fractional Periodicity of Persistent Currents: A Signature of Broken Internal Symmetry
M. KoskinenP. Singha DeoM. ManninenPekka Koskinensubject
PhysicsAngular momentumCondensed Matter - Mesoscale and Nanoscale PhysicsHeisenberg modelMany-body theoryGeneral Physics and AstronomyFOS: Physical sciencesPersistent currentMagnetic fluxsymbols.namesakeQuantum mechanicsHomogeneous spaceMesoscale and Nanoscale Physics (cond-mat.mes-hall)symbolsSymmetry breakingHamiltonian (quantum mechanics)description
We show from the symmetries of the many body Hamiltonian, cast into the form of the Heisenberg (spin) Hamiltonian, that the fractional periodicities of persistent currents are due to the breakdown of internal symmetry and the spin Hamiltonian holds the explanation to this transition. Numerical diagonalizations are performed to show this explicitely. Persistent currents therefore, provide an easy way to experimentally verify broken internal symmetry in electronic systems.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-09-01 |