Multiple Magnetorotons and Spectral Sum Rules in Fractional Quantum Hall Systems
Journal Article
·
· Physical Review Letters
- Brown Univ., Providence, RI (United States); UChicago
- Princeton Univ., NJ (United States)
- California State Univ. Los Angeles, CA (United States)
- Univ. of Chicago, IL (United States)
- Florida State Univ., Tallahassee, FL (United States)
We study, numerically, the charge neutral excitations (magnetorotons) in fractional quantum Hall systems, concentrating on the two Jain states near quarter filling, ν = 2/7 and ν = 2/9, and the ν = 1/4 Fermi-liquid state itself. In contrast to the ν = 1/3 states and the Jain states near half filling, on each of the two Jain states ν = 2/7 and ν = 2/9 the graviton spectral densities show two, instead of one, magnetoroton peaks. The magnetorotons have spin 2 and have opposite chiralities in the ν = 2/7 state and the same chirality in the ν = 2/9 state. Here, we also provide a numerical verification of a sum rule relating the guiding center spin s¯ with the spectral densities of the stress tensor.
- Research Organization:
- Univ. of Chicago, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- SC0002140; SC0009924
- OSTI ID:
- 1903188
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 128; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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