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Minkov, G. M.; Шерстобитов, А. А.; Германенко, А. В.; Рут, О. Э.

doi:10.1103/physrevb.78.195319

Cited by 3 publications

(4 citation statements)

References 31 publications

(25 reference statements)

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“…Consequently, it is understandable that the WL effect as one of typical quantum transport phenomena survives at room temperature (see Figure b). Similarly, the WL effect at relatively high temperatures ( T > 100 K) has been found in ZnO-based transport systems but not discussed in detail. − In contrast, the WL effect only appears up at low temperatures ( T < 100 K) in other oxides such as In 2 O 3 , ,− SnO 2 , ,− and CdO. , In conventional nonoxide materials like AlGaAs/GaAs heterostructures, the WL effect generally appears up at cryogenic temperatures. Therefore, there may be some distinctive characters in ZnO-based systems, which is also why Zn 1– x Mg x O/ZnO heterostructures are studied in this work.…”

Section: Resultsmentioning

confidence: 99%

“…51−53 In contrast, the WL effect only appears up at low temperatures (T < 100 K) in other oxides such as In 2 O 3 , 50,54−57 SnO 2 , 25,58−60 and CdO. 61,62 In conventional nonoxide materials like AlGaAs/GaAs heterostructures, 63 the WL effect generally appears up at cryogenic temperatures. Therefore, there may be some distinctive characters in ZnO-based systems, which is also why Zn 1−x Mg x O/ZnO heterostructures are studied in this work.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Gao

Rong

et al. 2020

J. Phys. Chem. C

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Quantum transport phenomenon such as quantum Hall effect usually appears up at cryogenic temperature. Here, we observe a room-temperature quantum transport phenomenon in ZnO-based two-dimensional systems. We successfully fabricate Zn1–x Mg x O/ZnO heterostructures by using magnetron sputtering with a low growth temperature which makes it feasible to obtain flexible heterostructures. Electrical transport properties of these heterostructures are studied. A parabolic negative magnetoresistance is clearly observed in a wide temperature range, which can be accurately described by the weak localization theory. By analyzing the temperature dependence of the dephasing length, it is found that the electron–electron scattering combined with two-dimensional electron–phonon scattering dominates the dephasing process for electrons. Importantly, the observed negative magnetoresistance persists up to 300 K. This indicates that room-temperature weak localization effect appears up, which can be attributed to weak electron–phonon scattering and small electron mobility. The present work provides a reference for realizing room-temperature quantum effect which is beneficial to develop quantum-interference devices.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Gao

Rong

et al. 2020

J. Phys. Chem. C

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“…Were the system more random, like e.g. [29], transport through it would be governed by percola- tion cluster and lateral cluster size could easily exceed 80 periods. In this case the properties of the system would be irreproducible and very large samples were needed for averaging, thus hindering the systematic studies and possible applications.…”

Section: Phase Diagrammentioning

confidence: 99%

“…All these phenomena are essentially nano-scale. We should also mention a group of a papers [23,[28][29][30][31], where percolation and transition to localization phenomena in the arrays of dots/antidots were explored.…”

Section: Introductionmentioning

confidence: 99%

High tunability of the transport properties in macroscopically in-plane modulated two-dimensional system

Shupletsov,

Kuntsevich,

Nunuparov

et al. 2018

Preprint

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Gate-controllable two dimensional systems with in-plane modulation of properties could serve as highly tunable effective media. Intuitively, such systems may bring novel functionality provided that the period of the lateral modulation is much less than the relevant scattering lengths (mean free path, coherence length etc.). Our work experimentally demonstrates the opposite, disordered limit of such system, defined in the macroscopically modulated metal-oxide-semiconductor structure. The system consists of parent two-dimensional gas with periodic array of islands(dots/antidots), filled with two-dimensional gas of different density, and surrounded by depletion regions(shells). Carrier densities of both parent gas and islands are controlled by two independent gate electrodes, allowing us to explore a rich phase diagram of low-temperature transport properties of this modulated two-dimensional system, resembling various transport regimes: insulating, shell-dominated, gasdominated, dot-dominated. These regimes can be identified by various Hall resistance and its magnetic field dependence, temperature dependencies of the resistivity, and Shubnikov-de Haas patterns. Thus, our work demonstrates feasibility of the macroscopically inhomogeneous two-dimensional system as a tunable platform for novel physics and applications.

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Percolation and the electron–electron interaction in an array of antidots

Ткаченко

Minkov

et al. 2016

Jetp Lett.

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Weak localization inAlxGa1−xAs/GaAs/Alx

Cited by 3 publications

References 31 publications

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

High tunability of the transport properties in macroscopically in-plane modulated two-dimensional system

Percolation and the electron–electron interaction in an array of antidots

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Weak localization inAlxGa1−xAs/GaAs/Alx

Cited by 3 publications

References 31 publications

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn1–xMgxO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn1–xMgxO/ZnO Heterostructures

High tunability of the transport properties in macroscopically in-plane modulated two-dimensional system

Percolation and the electron–electron interaction in an array of antidots

Contact Info

Product

Resources

About

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures

Room-Temperature Quantum Transport Phenomenon in Low-Temperature-Grown Zn_1–xMg_xO/ZnO Heterostructures