Two-dimensional electron system in high magnetic fields: Wigner crystal vs. composite-fermion liquid

Details Two-dimensional electron system in high magnetic fields: Wigner crystal vs. composite-fermion liquid Two-dimensional electron system in high magnetic fields: Wigner crystal vs. composite-fermion liquid

2003-03-22

arxiv.org/abs/cond-mat/0303487v1

Physical Review Letters, Vol. 90, 106403 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.90.106403

The two dimensional system of electrons in a high magnetic field offers an opportunity to investigate a phase transition from a quantum liquid into a Wigner solid. Recent experiments have revealed an incipient composite fermion liquid in a parameter range where theory and many experiments had previously suggested the Wigner crystal phase, thus calling into question our current understanding. This Letter shows how very small quantitative corrections (< 1%) in the energy due to the weak interaction between composite fermions can cause a fundamental change in the nature of the ground state, thus providing insight into the puzzling experimental results.

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