Electron correlation in the second Landau level: a competition between many, nearly degenerate quantum phases.

Journal Article · Wed Dec 01 00:00:00 EST 2004 · Proposed for publication in Physical Review Letters.

OSTI ID:952159

Vincente, C L ^[1]; Pan, Wei ^[2]; Stormer, H L ^[3]; Sullivan, N S ^[1]; Adams, E D ^[1]; Xia, J S ^[1]; West, Ken W ^[4]; Tsui, Daniel Chee ^[2]; Pfeiffer, Loren N ^[4]; Baldwin, K W ^[4]

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1. University of Florida, Gainesville, FL
2. Princeton University, Princeton, NJ
3. Columbia University, New York, New York
4. Bell Labs, Murray Hill, NJ

At a very low-temperature of 9 mK, electrons in the second Landau level of an extremely high-mobility two-dimensional electron system exhibit a very complex electronic behavior. With a varying filling factor, quantum liquids of different origins compete with several insulating phases leading to an irregular pattern in the transport parameters. We observe a fully developed v = 2+2/5 state separated from the even-denominator v = 2+1/2 state by an insulating phase and a v = 2+2/7 and v = 2+1/5 state surrounded by such phases. A developing plateau at v = 2+3/8 points to the existence of other even-denominator states.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 952159
• Report Number(s): SAND2005-0002J; TRN: US200913%%332
• Journal Information: Proposed for publication in Physical Review Letters., Journal Name: Proposed for publication in Physical Review Letters.
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON CORRELATION
TEMPERATURE RANGE 0000-0013 K
ELECTRONIC STRUCTURE
EQUATIONS OF STATE