Nonlocal effects in the resistance of one-dimensional wires with dangling side branches

Gershenson, M. E.; Echternach, P. M.; Mikhalchuk, A. G.; Bozler, H. M.; Bogdanov, A. L.; Nilsson, B.

doi:10.1103/physrevb.51.10256

Cited by 9 publications

(5 citation statements)

References 9 publications

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“…While these cited works are all theoretical, the experimental observation of quantum corrections to the resistance in one-dimensional gold wires with periodically spaced dangling side branches has also been reported [197]. This experiment reports that when the spacing between the dangling branches becomes smaller than the quantum lengths, the weak localization and electron-electron interaction corrections to the resistance are significantly reduced.…”

Section: Introductionmentioning

confidence: 76%

Photon, electron, magnon, phonon and plasmon mono-mode circuits

Vasseur

Akjouj

Dobrzyński

et al. 2004

Surface Science Reports

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Section: Introductionmentioning

confidence: 76%

Photon, electron, magnon, phonon and plasmon mono-mode circuits

Vasseur

Akjouj

Dobrzyński

et al. 2004

Surface Science Reports

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“…For example, quantum interference in the electronic path around a silica particle should lead to a magnetoresistance oscillation with a period ∆H = 4φ 0 /(πs 2 ) ~ 3T. The effect of the network in shaping the magnetoresistance, the relative orientation between wire and magnetic field, as well as the evaluation of the various phase-breaking mechanisms 34 is outside the scope of this paper.…”

Section: Resultsmentioning

confidence: 99%

Electronic transport in a three-dimensional network of one-dimensional bismuth quantum wires

Huber

Graf

1999

Phys. Rev. B

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The resistance R of a high-density network of 6-nm-diam Bi wires in porous Vycor glass is studied in order to observe its expected semiconductor behavior. R increases from 300 K down to 0.3 K. Below 4 K, where R varies approximately as ln(1/T), the order of magnitude of the resistance rise, as well as the behavior of the magnetoresistance, is consistent with localization and electron-electron interaction theories of a onedimensional disordered conductor in the presence of strong spin-orbit scattering. We show that this behavior and the surface-enhanced carrier density may mask the proposed semimetal-to-semiconductor transition for quantum Bi wires.

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“…These fins provide the heat sinks for the hot electrons in the wire and improve significantly the electron cooling [18]. At the same time, the cooling fins do not affect the 1D WL correction to the conductivity provided the spacing between them (L * =30 µm in our samples) is much greater than L ϕ (∼ 4.5µm at T = 0.05K for the studied wires) [19]. The 1D silver wires were fabricated by e-beam lithography and thermal evaporation of Ag (purity 99.9999%).…”

mentioning

confidence: 93%

Microwave-Induced Dephasing in One-Dimensional Metal Wires

2006

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We report on the effect of monochromatic microwave (MW) radiation on the weak localization corrections to the conductivity of quasi-one-dimensional (1D) silver wires. Due to the improved electron cooling in the wires, the MW-induced dephasing was observed without a concomitant overheating of electrons over wide ranges of the MW power PMW and frequency f . The observed dependences of the conductivity and MW-induced dephasing rate on PMW and f are in agreement with the theory by Altshuler, Aronov, and Khmelnitsky [1]. Our results suggest that in the lowtemperature experiments with 1D wires, saturation of the temperature dependence of the dephasing time can be caused by an MW electromagnetic noise with a sub-pW power. The processes of dephasing of electron wave function are central to the electronic transport in mesoscopic systems [2]. The dominant low-temperature dephasing mechanism in low-dimensional conductors is the scattering of an electron by equilibrium fluctuations of the electric field in the conductor, i.e. the Nyquist (Johnson) noise [3]. The Nyquist dephasing time τ ϕ increases with decreasing temperature as T −2/3 in the quasi-onedimensional (1D) conductors with the cross-sectional dimensions much smaller than the dephasing length L ϕ = Dτ ϕ (D is the electron diffusion constant) [3]. In the 1D metallic wires, this mechanism typically governs the dephasing at T < 1K [4,5,6].Recently, the interest in the fundamental limitations on τ ϕ was invigorated by the reports on the saturation of τ ϕ (T ) dependences in one-and zero-dimensional systems at ultra-low temperatures (see, e.g. [7,8]). The experiments [6] demonstrated that, at least in some studied 1D wires, this saturation could be attributed to the presence of localized spins in a small concentration undetectable by analytical methods. However, the problem of τ ϕ (T ) saturation in the most "clean" samples remained open [9]. One of the"extrinsic" mechanisms that might lead to the saturation of τ ϕ (T ) is the dephasing by the external microwave (MW) electromagnetic noise [1]. Detection of a very weak MW noise that is sufficient to destroy the phase coherence at ultra-low temperatures is a challenge. Indeed, the MW-induced dephasing may occur without an easily-observable electron overheating if the electrons in a wire can efficiently dissipate their energy in the environment [10]. The possibility of "noisedephasing-without-overheating" has not been ruled out in the experiments [7,9,11].In this Letter, we study the dephasing by monochromatic microwave radiation in 1D wires. By optimizing the sample design, we minimized electron overheating and observed for the first time the microwave-induced dephasing in 1D wires without a concomitant overheating of electrons. The dependences of the MW-induced dephasing rate on the MW power and frequency are in agreement with the theoretical predictions [1]. Our results suggest that the τ ϕ (T ) dependence in a 1D wire may be significantly affected by a sub-pW power of an external microwave noise absorbed in the sample...

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Nonlocal effects in the resistance of one-dimensional wires with dangling side branches

Cited by 9 publications

References 9 publications

Photon, electron, magnon, phonon and plasmon mono-mode circuits

Photon, electron, magnon, phonon and plasmon mono-mode circuits

Electronic transport in a three-dimensional network of one-dimensional bismuth quantum wires

Microwave-Induced Dephasing in One-Dimensional Metal Wires

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