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Fundamental relation between electrical and thermoelectric transport coefficients in the quantum Hall regime
Tieke, B; Fletcher, R; Zeitler, U; Geim, A K; Henini, M; Maan, J C
Physical Review Letters. 1997;78(24):4621-4624.
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Abstract
The two components S-xx and S-yx of the phonon-drag thermoelectric power in two-dimensional electron gases (2DEGs) are found to be related by S-yx = alpha B(dS(xx)/dB) in the integer and fractional quantum Hall regime. A similar relation exists for electrical resistivity, rho(xx) = alpha B(d rho(xy)/dB), and we show that experimentally the constant alpha is the same in both cases indicating the universal character of such relations for transport in 2DEGs. These results link the behavior of S-yx, which hitherto has not been understood, to that of S-xx and thus opens a new way of explaining this quantity.
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gaas-ga1-xalxas heterojunctions; gas; magnetic-field; resistivity; scattering; systems; thermopower
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- Related website <Go to ISI>://A1997XE57100023
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