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Volumn 317, Issue 5843, 2007, Pages 1356-1359

Bilayer 3He: A simple two-dimensional heavy-fermion system with quantum criticality

Author keywords

[No Author keywords available]

Indexed keywords

GRAPHITE; HELIUM;

EID: 34548726134     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1143607     Document Type: Article
Times cited : (112)

References (40)
  • 17
    • 34548808812 scopus 로고    scopus 로고
    • 4.
    • 4.
  • 21
    • 34548763271 scopus 로고    scopus 로고
    • The bare substrate used in this work is a sample of exfoliated graphite with a total surface area of 182 m2. 4He has a higher binding energy to the graphite surface than does 3He, arising from its smaller zero-point energy. This preferential adsorption is exploited to preplate the surface. The 4He coverage required for precisely two atomic layers is 21.2 nm-2, as shown by previous work 39
    • -2, as shown by previous work (39).
  • 22
    • 34548766251 scopus 로고    scopus 로고
    • See supporting material on Science Online.
    • See supporting material on Science Online.
  • 23
    • 34548743106 scopus 로고    scopus 로고
    • 2).
    • 2).
  • 24
    • 34548808285 scopus 로고    scopus 로고
    • -2, when the uniform solid first forms.
    • -2, when the uniform solid first forms.
  • 25
    • 34548803210 scopus 로고    scopus 로고
    • 3He monolayer adsorbed on bare graphite.
    • 3He monolayer adsorbed on bare graphite.
  • 26
    • 34548749468 scopus 로고    scopus 로고
    • For a strongly correlated 2D 3He fluid monolayer, previous work (12) has shown that the crossover from Curie-law susceptibility at high temperatures to a Pauli susceptibility in the degenerate regime is well described by χ, C/(T2, T F**2)1/2, with Curie constant C, and an effective degeneracy temperature TF**, TF0(1, F0 a, m*/m, where TF0, 0.505n (K nm2) is the Fermi temperature of the corresponding ideal Fermi gas and F0a is a Fermi liquid Landau parameter. However, in the 3He bilayer system we find that the onset of spin degeneracy is governed by T0 rather than TF**. For example, at 9.0 nm-2, TF**
    • 0 = 12 mK.
  • 37
    • 33847133944 scopus 로고    scopus 로고
    • P. Gegenwart et al., Science 315, 969 (2007).
    • (2007) Science , vol.315 , pp. 969
    • Gegenwart, P.1
  • 39
    • 34548807241 scopus 로고    scopus 로고
    • F. Ziouzia, thesis, Royal Holloway, University of London (2004).
    • F. Ziouzia, thesis, Royal Holloway, University of London (2004).
  • 40
    • 34548783484 scopus 로고    scopus 로고
    • We thank P. Coleman, D. Edwards, M. Grosche, A. Hewson, C. Pépin, and A. J. Schofield for discussions. Supported by the UK Engineering and Physical Sciences Research Council grant GR/S20567/01
    • We thank P. Coleman, D. Edwards, M. Grosche, A. Hewson, C. Pépin, and A. J. Schofield for discussions. Supported by the UK Engineering and Physical Sciences Research Council grant GR/S20567/01.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.