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Volumn 93, Issue 6, 2004, Pages

Electron-spin and electron-orbital dependence of the tunnel coupling in laterally coupled double vertical dots

Author keywords

[No Author keywords available]

Indexed keywords

CHEMICAL BONDS; ELECTRON GAS; ELECTRON TUNNELING; ELECTRONIC STRUCTURE; FERMI SURFACE; HETEROJUNCTIONS; MAGNETIC FIELDS; OSCILLATIONS; PROBABILITY; QUANTUM THEORY; SCANNING ELECTRON MICROSCOPY; SEMICONDUCTOR DEVICES; STATISTICAL METHODS;

EID: 19244365494     PISSN: 00319007     EISSN: None     Source Type: Journal    
DOI: 10.1103/PhysRevLett.93.066806     Document Type: Article
Times cited : (44)

References (27)
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    • C. Livermore et al., Science 274, 1332 (1996); J. M. Golden and B. I. Halperin, Phys. Rev. B 53, 3893 (1996); K. A. Matveev, L. I. Glazman, and H. U. Baranger, Phys. Rev. B 54, 5637 (1996).
    • (1996) Phys. Rev. B , vol.54 , pp. 5637
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    • note
    • Note that degeneracy in the level structure of either dot complicates this analysis. Indeed, the magnetic field data in Fig. 4 seem to indicate one instance of degeneracy at B = 0. However, asymmetry in the bare frequencies along perpendicular directions need be only of order 2% in order that the splitting of levels in a shell are comparable to the tunnel splitting. Thus, nondegenerate levels are a reasonable assumption.
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    • note
    • inter is the exchange-modified interaction between the dots.
  • 23
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    • We note that if the distribution of t were given simply by the Porter-Thomas distribution [cf. T. A. Brody et al., Rev. Mod. Phys. 53, 385 (1981)], this ratio would instead be √2. However, we are presumably far from the ergodic regime.
    • (1981) Rev. Mod. Phys. , vol.53 , pp. 385
    • Brody, T.A.1
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    • note
    • i is the average anticrossing size for orbital i (averaged over J).
  • 26
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    • V. Fock, Z. Phys. 47, 446 (1928); C. G. Darwin, Proc. Cambridge Philos. Soc. 27, 86 (1930).
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    • Fock, V.1


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