Magnetoconductivity of ultrathin epitaxial Ag films on Si(111)<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>7</mml:mn><mml:mo>×</mml:mo><mml:mn>7</mml:mn></mml:math>at low temperatures

Henzler, M.; Lüer, T.; Heitmann, Johannes

doi:10.1103/physrevb.59.2383

Cited by 30 publications

(23 citation statements)

References 15 publications

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“…The appearance of negative MR in the low temperature regime (Figure 4c) is again consistent with weak localization, verifying that these materials are indeed 2D. 35−37 …”

Section: Resultssupporting

confidence: 66%

Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films

et al. 2014

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Since the discovery of graphene, the quest for two-dimensional (2D) materials has intensified greatly. Recently, a new family of 2D transition metal carbides and carbonitrides (MXenes) was discovered that is both conducting and hydrophilic, an uncommon combination. To date MXenes have been produced as powders, flakes, and colloidal solutions. Herein, we report on the fabrication of ∼1 × 1 cm2 Ti3C2 films by selective etching of Al, from sputter-deposited epitaxial Ti3AlC2 films, in aqueous HF or NH4HF2. Films that were about 19 nm thick, etched with NH4HF2, transmit ∼90% of the light in the visible-to-infrared range and exhibit metallic conductivity down to ∼100 K. Below 100 K, the films’ resistivity increases with decreasing temperature and they exhibit negative magnetoresistance—both observations consistent with a weak localization phenomenon characteristic of many 2D defective solids. This advance opens the door for the use of MXenes in electronic, photonic, and sensing applications.

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“…The appearance of negative MR in the low temperature regime (Figure 4c) is again consistent with weak localization, verifying that these materials are indeed 2D. 35−37 …”

Section: Resultssupporting

confidence: 66%

Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films

et al. 2014

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“…In this case, no oscillation was observed. 10 Nonmetallic conductivity behaviors have been reported in weak localization metals, 29,30 which exhibit localization of conduction electrons by interference of constructive interference of backscattered electrons. The applied magnetic field can destroy the weak localization and induce negative magnetoresistance.…”

Section: Resultsmentioning

confidence: 99%

Semiconductor-superconductor transition and magnetoresistance terraces in an ultrathin superconducting Pb nanobridge

Wang

Jia

et al. 2010

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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Using focused ion beam etching technique, the authors fabricated a 28 atomic monolayers thick, 500 nm wide, and 10 μm long Pb nanobridge from an atomically flat Pb thin film grown on Si by molecular beam epitaxy. Electric transport measurements show exotic resistance oscillations in the superconducting state far below its critical field HC and cascading terraces near the superconducting transition region. Furthermore, the bridge shows an unusual semiconducting behavior above the superconducting transition temperature TC. The results are in contrast to those observed in its counterpart of the two-dimensional thin film.

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“…1(a), the measured resistance V I is related with magnetoconductance σ as V I = ln 2 π 1 σ = ln 2 π R s (1 + μ 2 B 2 ), where R s and μ are sheet resistance and the mobility of the carriers, respectively. 14,15 The factor μ 2 B 2 accounts for the classical magnetoresistance, which shows negligible effect at ordinary magnetic-flux densities, except for very high mobility samples. In the classic limit, μ equals eτ 0 m * , where τ 0 corresponds to relaxation time at zero magnetic field.…”

Section: Resultsmentioning

confidence: 99%

Enhanced spin relaxation in an ultrathin metal film by the Rashba-type surface

et al. 2011

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We measured the magnetoconductance of bare and √ 3 × √ 3-Bi/Ag-terminated ultrathin Ag(111) films by the micro-four-point probe method as a function of the applied magnetic field. The experimental curves were analyzed by introducing the results of photoemission investigation and band-structure calculations into the Hikami-Larkin-Nagaoka formula, in order to derive the characteristic fields of the two systems. The formation of the Rashba-type surface alloy was found to reduce the spin-relaxation time in the ultrathin film significantly.

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Magnetoconductivity of ultrathin epitaxial Ag films on Si(111)7×7at low temperatures

Cited by 30 publications

References 15 publications

Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films

Transparent Conductive Two-Dimensional Titanium Carbide Epitaxial Thin Films

Semiconductor-superconductor transition and magnetoresistance terraces in an ultrathin superconducting Pb nanobridge

Enhanced spin relaxation in an ultrathin metal film by the Rashba-type surface

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