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Physical Review Letters
Volumn 68, Issue 25, 1992, Pages 3765-3768
Peltier coefficient and thermal conductance of a quantum point contact
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Indexed keywords

EID: 0000375714     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.68.3765     Document Type: Article
Times cited : (164)
References (15)
  • 2
    • 84927444035 scopus 로고    scopus 로고
    • A comprehensive review of quantum transport in semiconductor nanostructures is C. W. J. Beenakker and H. van Houten, in Solid State Physics, edited by H. Ehrenreich and D. Turnbull (Academic, New York, 1991), Vol. 44, p. 1.
  • 7
    • 84927444022 scopus 로고    scopus 로고
    • A more extensive discussion of the theory can be found in H. van Houten, L. W. Molenkamp. C. W. J. Beenakker, and C. T. Foxon, in Proceedings of the Seventh International Conference on Hot Carriers in Semiconductors, Nara, 1991 [Semicond. Sci. Technol. (to be published)].
  • 11
    • 84927444021 scopus 로고    scopus 로고
    • Condensed Systems of Low Dimensionality, NATO Advanced Study Institutes, Ser. B. Vol. 253, edited by J. Beeby (Plenum, New York, 1991), p. 335.
  • 12
    • 84927444020 scopus 로고    scopus 로고
    • Measurements of Peltier heating and cooling in samples having d = 1.5 10 mum for a comparable ac current I app 0.2 muA yield oscillating thermovoltages of very similar magnitude as found in the d=5 mum sample (Fig. 2). This indicates that for this current level the temperature difference δ T is uniform on both sides of the central QPC.
  • 13
    • 84927444019 scopus 로고    scopus 로고
    • We may neglect κ δ T with respect to Π I in Eq. (4) as follows: From Fig. 2 we find that δ T approx 40 mK; using the Wiedemann-Franz relation (5) for evaluating kappa we arrive at k δ T approx 2.5 times 10-13 W, which is much smaller than Π I approx 2 times 10-11 W.
  • 15
    • 84927444017 scopus 로고    scopus 로고
    • In the thermal conductance experiments, the thermovoltages measured for a given ac current I in d=5 or 10 mum samples are considerably smaller than in a d = 1.5 mum sample (Fig. 3). In order to obtain a reasonable signal-to-noise ratio in experiments on these samples, one needs to increase the ac current to levels where thermal smearing obscures the quantum size effect.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.