PMID: 15245121Jul 13, 2004Paper

Dependence of spin susceptibility of a two-dimensional electron system on the valley degree of freedom

Physical Review Letters
Y P ShkolnikovM Shayegan

Abstract

We report measurements of the spin susceptibility, chi proportional, variant g(v)g*m*, in an AlAs two-dimensional electron system where, via the application of in-plane stress, we transfer electrons from one ellipsoidal conduction-band valley to another (g(v) is the valley degeneracy, and m* and g* are the electron effective mass and g factor). At a given density, when the two valleys are equally populated (g(v)=2), the measured g*m* is smaller than when only one valley is occupied (g(v)=1). This observation counters the common assumption that a two-valley two-dimensional system is effectively more dilute than a single-valley system because of its smaller Fermi energy.

References

Jun 15, 1989·Physical Review. B, Condensed Matter· van Kesteren HWC T Foxon
Aug 11, 2001·Physical Review Letters·A A ShashkinT M Klapwijk
Jul 5, 2002·Physical Review Letters·Claudio AttaccaliteGiovanni B Bachelet
Dec 18, 2002·Physical Review Letters·Y P ShkolnikovM Shayegan
Mar 14, 2003·Physical Review Letters·J ZhuK W West

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Citations

Jun 19, 2013·Scientific Reports·V T RenardK Takashina
Aug 11, 2005·Physical Review Letters·S De PaloGaetano Senatore
Jun 2, 2015·Nature Communications·V T RenardK Takashina
Feb 27, 2018·Physical Review Letters·Zefang WangJie Shan
Feb 12, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·S A Parameswaran, B E Feldman
Aug 8, 2018·Physical Review Letters·M A MueedM Shayegan
Oct 10, 2006·Physical Review Letters·K VakiliM Shayegan
Dec 5, 2020·Proceedings of the National Academy of Sciences of the United States of America·M S HossainM Shayegan
Dec 31, 2005·Physical Review Letters·Suhas Gangadharaiah, Dmitrii L Maslov
Dec 13, 2006·Physical Review Letters·O GunawanM Shayegan
May 21, 2005·Physical Review Letters·K VakiliM Shayegan
Aug 11, 2005·Physical Review Letters·Y P ShkolnikovM Shayegan

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