A low-temperature insulating phase at v=1.5 for 2D holes in high-mobility SiSi1-xGex heterostructures with Landau level degeneracy

Dunford, RB, Mitchell, EE, Clark, RG, Stadnik, VA, Fang, FF, Newbury, R, McKenzie, RH, Starrett, RP, Wang, PJ and Meyerson, BS (1997) A low-temperature insulating phase at v=1.5 for 2D holes in high-mobility SiSi1-xGex heterostructures with Landau level degeneracy. Journal of Physics-condensed Matter, 9 7: 1565-1574. doi:10.1088/0953-8984/9/7/018


Author Dunford, RB
Mitchell, EE
Clark, RG
Stadnik, VA
Fang, FF
Newbury, R
McKenzie, RH
Starrett, RP
Wang, PJ
Meyerson, BS
Title A low-temperature insulating phase at v=1.5 for 2D holes in high-mobility SiSi1-xGex heterostructures with Landau level degeneracy
Journal name Journal of Physics-condensed Matter   Check publisher's open access policy
ISSN 0953-8984
Publication date 1997-01-01
Sub-type Article (original research)
DOI 10.1088/0953-8984/9/7/018
Volume 9
Issue 7
Start page 1565
End page 1574
Total pages 10
Language eng
Abstract Magneto-transport measurements of the 2D hole system (2DHS) in p-type Si-Si1-xGex heterostructures identify the integer quantum Hall effect (IQHE) at dominantly odd-integer filling factors v and two low-temperature insulating phases (IPs) at v = 1.5 and v less than or similar to 0.5, with re-entrance to the quantum Hall effect at v = 1. The temperature dependence, current-voltage characteristics, and tilted field and illumination responses of the IP at v = 1.5 indicate that the important physics is associated with an energy degeneracy of adjacent Landau levels of opposite spin, which provides a basis for consideration of an intrinsic, many-body origin.
Keyword Physics, Condensed Matter
Spin-polarization Instability
Doped Double Heterostructures
Quantum Hall Liquid
Magnetic-fields
Si/sige Heterostructures
Silicon-germanium
Electron-system
Wigner Crystal
Gas
States
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
School of Physical Sciences Publications
 
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Created: Tue, 14 Aug 2007, 02:41:11 EST