Thermal and Quantum Melting Phase Diagrams for a Magnetic-Field-Induced Wigner Solid
Journal Article
·
· Physical Review Letters
- Princeton Univ., NJ (United States); OSTI
- Princeton Univ., NJ (United States)
- Northern Illinois Univ., DeKalb, IL (United States)
A sufficiently large perpendicular magnetic field quenches the kinetic (Fermi) energy of an interacting two-dimensional (2D) system of fermions, making them susceptible to the formation of a Wigner solid (WS) phase in which the charged carriers organize themselves in a periodic array in order to minimize their Coulomb repulsion energy. In low-disorder 2D electron systems confined to modulation-doped GaAs heterostructures, signatures of a magnetic-field-induced WS appear at low temperatures and very small Landau level filling factors ($$\textit{ν}$$ ≃ 1/5). In dilute GaAs 2D hole systems, on the other hand, thanks to the larger hole effective mass and the ensuing Landau level mixing, the WS forms at relatively higher fillings ($$\textit{ν}$$ ≃ 1/3). Here we report our measurements of the fundamental temperature vs filling phase diagram for the 2D holes’ WS-liquid thermal melting. Moreover, via changing the 2D hole density, we also probe their Landau level mixing vs filling WS-liquid quantum melting phase diagram. In this work, we find our data to be in good agreement with the results of very recent calculations, although intriguing subtleties remain.
- Research Organization:
- Princeton Univ., NJ (United States)
- Sponsoring Organization:
- Gordon and Betty Moore Foundation; National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-00ER45841
- OSTI ID:
- 1800000
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 3 Vol. 125; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Melting phase diagram of bubble phases in high Landau levels
Probing the Melting of a Two-Dimensional Quantum Wigner Crystal via its Screening Efficiency
Journal Article
·
Sun Sep 19 20:00:00 EDT 2021
· Physical Review. B
·
OSTI ID:1849361
Probing the Melting of a Two-Dimensional Quantum Wigner Crystal via its Screening Efficiency
Journal Article
·
Wed Mar 20 20:00:00 EDT 2019
· Physical Review Letters
·
OSTI ID:1609342