Dilatometer with a sensitivity of 10−4 angstrom

Pudalov, V. M.; Khaikin, M. S.

doi:10.1016/0011-2275(69)90194-5

Cited by 15 publications

(3 citation statements)

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“…Considering the possible features in which the high mobility Si-MOS structures differ from other systems, like GaAs/Al(Ga)As where the mobility edge was not found [15], we would like to note the following: (i) the Coulomb interaction energy E ee = e 2 /κr is higher in Si-MOS structures than in GaAs samples (at the same interelectron distance, r) by a factor of 1.7 due to the smaller dielectric constant κ = 7.7 at the Si/SiO 2 interface [1], (ii) the Si/SiO 2 interface is characterized by a very strong asymmetry of the confining potential in the z− direction. The latter results in a large effective Lorentzian field H * seen by electrons; the corresponding spin-orbit gap at zero field was found to be equal to ≈ 4K [12]. These effects associated with the broken reflection symmetry of the confining potential are much less pronounced in GaAs/Al(Ga)As heterojunctions and are apparently absent in the rectangular potential wells.…”

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confidence: 93%

“…It has been noticed earlier [12] that the temperature dependence of the resistivity of the 2D metallic phase may be well described by an empirical law ρ(T ) = ρ 1 + ρ 2 exp(−T * /T ), where ρ 1 is related to scattering at T = 0, while the second term is associated with an energy gap, ∆ = kT * . Since the parallel field does not affect orbital electron motion, the magnetic field may couple to the 2D electrons only via their spins.…”

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confidence: 98%

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Instability of the two-dimensional metallic phase to a parallel magnetic field

et al. 1997

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We report on magnetotransport studies of the unusual two-dimensional metallic phase in high mobility Si-MOS structures. We have observed that the magnetic field applied in the 2D plane suppresses the metallic state, causing the resistivity to increase dramatically by more than 30 times. Over the total existence range of the metallic state, we have found three distinct types of the magnetoresistance, related to the corresponding quantum corrections to the conductivity. Our data suggest that the unusual metallic state is a consequence of both spin-and Coulomb-interaction effects.Typeset using REVT E X 1

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Instability of the two-dimensional metallic phase to a parallel magnetic field

et al. 1997

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“…Higher frequencies still were employed by PUDALOV and KHAIKIN [PuD69], who used a coaxial microwave resonator (9.5 GHz) as a dilatometric transducer. Employing an x-cut quartz crystal as a calibrating element,1O the detection sensitivity for unity signal/noise ratio was found to be 1 x 10-12 • (b) Light Waves.…”

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confidence: 99%

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Collings¹

1986

205

125

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All rights reservedNo part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher To BETTY JANE AND CHRISTOPHER also to an international community of low-temperature physicists and cryogenic engineers whose work is represented on these pagesType-2 Superconductor in the Critical Mixed State.-Carbon-replicated electron micrograph of a ferromagnetic-particle-decorated representation of the arrangement of axially directed flux lines in an annealed-and-deformed Pb-In(6.3 at.OJo) 4-mm!6 rod in the trapping critical state (see, e.g., Figure 16-7). The arrangement of the flux lines was found to change continuously from long-range-ordered in the relatively high field (-70 G) interior region of the sample (;;, 400 ,an deep) [left-hand plate], to amorphous in the low-residual-field region just below the surface (,,; 100,an deep) [right-hand plate]. In this material, for which K = 2 at 1.2 K, the flux-lattice parameter at 70 G is about 0.6 I'm. Original micrograph courtesy of U. Essmann, Max-Planck-Institute fUr Metallforschung, Institut fUr Physik, Stuttgart, West Germany. (Reference: H. Trauble and U. Essmann, J. Appl. Phys. 39,4052-4059 (1968))1.General Preface xi property optimization. (iii) Superconductor and superconducting magnet design engineers for whom the chapters on Stability, AC Loss, and Conductor Design are intended. (iv) Manufacturers of "NbTi" alloy superconductors who wish to become reapprised of the Ti-alloy metallurgy and metal physics that underlies the behavior and properties of their product. Administrative Credits and Genesis

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Thermische Ausdehnung

Eder

1983

Arbeitsmethoden Der Thermodynamik

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Dilatometer with a sensitivity of 10−4 angstrom

Cited by 15 publications

References 5 publications

Instability of the two-dimensional metallic phase to a parallel magnetic field

Instability of the two-dimensional metallic phase to a parallel magnetic field

Applied Superconductivity, Metallurgy, and Physics of Titanium Alloys

Thermische Ausdehnung

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