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Volumn 80, Issue 3, 2009, Pages

Correlation energy and spin susceptibility of a two-valley two-dimensional electron gas

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EID: 68949108700     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.80.035103     Document Type: Article
Times cited : (28)

References (42)
  • 1
    • 0003562493 scopus 로고    scopus 로고
    • edited by D. D. Awscholom, N. Samarth, and D. Loss (Springer-Verlag, Berlin
    • Semiconductor Spintronics and Quantum Computing, edited by, D. D. Awscholom, N. Samarth and, D. Loss, (Springer-Verlag, Berlin, 2002).
    • (2002) Semiconductor Spintronics and Quantum Computing
  • 2
    • 34147154732 scopus 로고    scopus 로고
    • Nuclear spin ferromagnetic phase transition in an interacting two dimensional electron gas
    • DOI 10.1103/PhysRevLett.98.156401
    • P. Simon and D. Loss, Phys. Rev. Lett. 98, 156401 (2007). 10.1103/PhysRevLett.98.156401 (Pubitemid 46559739)
    • (2007) Physical Review Letters , vol.98 , Issue.15 , pp. 156401
    • Simon, P.1    Loss, D.2
  • 6
    • 0442312095 scopus 로고    scopus 로고
    • Metal-insulator transition in two-dimensional electron systems
    • DOI 10.1088/0034-4885/67/1/R01, PII S0034488504576789
    • S. V. Kravchenko and M. P. Sarachik, Rep. Prog. Phys. 67, 1 (2004), and references therein. 10.1088/0034-4885/67/1/R01 (Pubitemid 38185118)
    • (2004) Reports on Progress in Physics , vol.67 , Issue.1 , pp. 1-44
    • Kravchenko, S.V.1    Sarachik, M.P.2
  • 9
    • 0030595892 scopus 로고    scopus 로고
    • 10.1209/epl/i1996-00289-y
    • S. Conti and G. Senatore, Europhys. Lett. 36, 695 (1996). 10.1209/epl/i1996-00289-y
    • (1996) Europhys. Lett. , vol.36 , pp. 695
    • Conti, S.1    Senatore, G.2
  • 10
    • 26844431696 scopus 로고    scopus 로고
    • Physics: Metal-insulator transition in disordered two-dimensional electron systems
    • DOI 10.1126/science.1115660
    • A. Punnoose and A. M. Finkel'stein, Science 310, 289 (2005). 10.1126/science.1115660 (Pubitemid 41457191)
    • (2005) Science , vol.310 , Issue.5746 , pp. 289-291
    • Punnoose, A.1    Finkel'stein, A.M.2
  • 13
  • 22
    • 68949147393 scopus 로고    scopus 로고
    • Indeed, for the one-valley 2DEG the RPA grossly overestimates χs (Ref.) and predicts a divergence at moderately low density (Ref.) which can only be ascribed to its limited accuracy. Similarly, a small but unjustified change in the correlation energy in the calculations carried out for the 2V2DEG within the classical mapping changes a χs finite and smooth at all densities in a diverging one.
    • Indeed, for the one-valley 2DEG the RPA grossly overestimates χs (Ref.) and predicts a divergence at moderately low density (Ref.) which can only be ascribed to its limited accuracy. Similarly, a small but unjustified change in the correlation energy in the calculations carried out for the 2V2DEG within the classical mapping changes a χs finite and smooth at all densities in a diverging one.
  • 25
    • 68949160497 scopus 로고    scopus 로고
    • Evidently, we disregard the valley splitting predicted when going beyond the effective-mass approximation (Ref.).
    • Evidently, we disregard the valley splitting predicted when going beyond the effective-mass approximation (Ref.).
  • 29
    • 68949148384 scopus 로고    scopus 로고
    • Further energy gain for the four-component phase could be in principle obtained by allowing spin/valley contamination, i.e., considering a spin/valley dependent backflow. However, a systematic study exploiting this possibility (Ref.) for the unpolarized three-dimensional electron gas gave energies in error bar with ones obtained with spin-independent backflow (Ref.).
    • Further energy gain for the four-component phase could be in principle obtained by allowing spin/valley contamination, i.e., considering a spin/valley dependent backflow. However, a systematic study exploiting this possibility (Ref.) for the unpolarized three-dimensional electron gas gave energies in error bar with ones obtained with spin-independent backflow (Ref.).
  • 32
    • 68949142168 scopus 로고    scopus 로고
    • Actually, the convexity of E (rs, ζ) is spoiled by the exchange term at some finite polarization ζc. However, for rs 1, correlation effects push ζc exponentially close to one, in a range 1- ζc e-β rs.
    • Actually, the convexity of E (rs, ζ) is spoiled by the exchange term at some finite polarization ζc. However, for rs 1, correlation effects push ζc exponentially close to one, in a range 1- ζc e-β rs.
  • 33
    • 33646724462 scopus 로고    scopus 로고
    • Nonlinear 2D spin susceptibility in a finite magnetic field: Spin-polarization dependence
    • DOI 10.1103/PhysRevLett.96.196602
    • Y. Zhang and S. Das Sarma, Phys. Rev. Lett. 96, 196602 (2006). 10.1103/PhysRevLett.96.196602 (Pubitemid 43752431)
    • (2006) Physical Review Letters , vol.96 , Issue.19 , pp. 196602
    • Zhang, Y.1    Das Sarma, S.2
  • 38
    • 68949158018 scopus 로고    scopus 로고
    • The coefficients of the leading powers of rs are kept fixed to their analytical values for the crystal phase in Ref., whereas they are fitting parameters in the present work.
    • The coefficients of the leading powers of rs are kept fixed to their analytical values for the crystal phase in Ref., whereas they are fitting parameters in the present work.


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