Výsledky vyhledávání

Wigner solid pinning modes tuned by fractional quantum Hall states of a nearby layer

Autor: Ken W. West, Anthony Hatke, Mansour Shayegan, Loren Pfeiffer, H. Deng, L. W. Engel, Kirk Baldwin, Yang Liu

Publikováno v: Science Advances

Pinning modes of a Wigner solid show remarkably small screening by a fractional quantum Hall liquid in close proximity.
We studied a bilayer system hosting two-dimensional electron systems (2DESs) in close proximity but isolated from one another

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fa39d28c25be20ea0816cbaca583ff19
http://arxiv.org/abs/1810.05925

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Microwave resonance and weak pinning in two-dimensional hole systems at high magnetic fields

Autor: C. C. Li, L. W. Engel, Mansour Shayegan, Dan Shahar, D. C. Tsui, J. Yoon

Publikováno v: Physical Review B. 61:10905-10909

Microwave frequency conductivity $\mathrm{Re}({\ensuremath{\sigma}}_{\mathrm{xx}})$ of high quality two-dimensional hole systems (2DHS) in a large perpendicular magnetic field (B) is measured with the carrier density ${(n}_{s})$ of the 2DHS controlle

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::30f5c59e597aff0c71a3632a118b0f41
https://doi.org/10.1103/physrevb.61.10905

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Microwave conductivity of 2D hole systems at low filling

Autor: L. W. Engel, D. C. Tsui, C. C. Li, Mansour Shayegan, Dan Shahar

Publikováno v: Physica B: Condensed Matter. :57-60

We have measured the real part of the diagonal conductivity, Re(σxx) for a 2D hole system in the low Landau filling, insulating regime. The spectra, Re(σxx) versus frequency f, show a well-defined, single resonance peak, which is surprisingly sharp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5cfdd1cc311aaa14d0b405232345a4a3
https://doi.org/10.1016/s0921-4526(98)00066-0

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The Faraday effect in Cd0.57Mn0.43Te in high magnetic field

Publikováno v: ResearcherID

The experimental results of Faraday rotation (FR) measurements in dilute magnetic semiconductors in high magnetic field (`Dirac Series' – Los Alamos) are presented. The magnetic field is produced by an explosive-driven flux-compression generator (1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e69fd70e3317809a6cf2d9ae497b651
https://doi.org/10.1016/s0921-4526(97)00925-3

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Dirac II series in 800T fields: Reflectivity measurements on low-dimensional, low electron density materials

Publikováno v: Physica B: Condensed Matter. :50-53

We report reflectivity measurements at 810 nm wavelength on GaAs/GaAlAs multiple quantum wells and NbSe2 layers at 75 K up to magnetic fields of 800 T. In the GaAs system, we observed in two separate measurements new, reproducible oscillatory phenome

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cba853028aa86cb9e4a45206dd7321b4
https://doi.org/10.1016/s0921-4526(98)00024-6

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Microwave resonances in low-filling insulating phase of two-dimensional electron system

Autor: Mansour Shayegan, L. W. Engel, C. C. Li, Dan Shahar, D. C. Tsui

Publikováno v: Solid State Communications. 104:167-171

We present data on finite frequency (0.2 ≤ f ≤ 8.6 GHz) conductivity, Re(σxx), of the insulator terminating a fractional quantum Hall effect series in the high magnetic field (B) limit. As B is increased within the insulator, at temperatures of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::61f4049999161baa5d0c98f3bd68e5fa
https://doi.org/10.1016/s0038-1098(97)00302-5

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Measurement instrumentation for electrical transport experiments in extreme pulsed magnetic fields generated by flux compression

Autor: Bruce E. Kane, A.V. Skougarevsky, J.D. Goettee, Andrew S. Dzurak, T. Takamasu, L. W. Engel, H. Nakagawa, Dwight G. Rickel, N. E. Lumpkin, R. G. Clark, R. P. Starrett, G. R. Facer, H. Yokoi, N. Miura, James S. Brooks

Publikováno v: ResearcherID

We describe purpose-built instrumentation that has proved successful in making transport measurements of materials in ultrahigh magnetic fields generated by explosive-driven flux compression. The experimental arrangement minimizes severe problems of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9239b44b367872869a510e0beb1159d7
https://doi.org/10.1063/1.1148037

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Microwave Conductivity Resonance of Two-Dimensional Hole System

Autor: C. C. Li, D. C. Tsui, L. W. Engel, Mansour Shayegan, Dan Shahar

Publikováno v: Physical Review Letters. 79:1353-1356

We have measured microwave conductivity, Ressxxd, of a high quality two-dimensional hole system (2DHS) in the high magnetic field (B) insulating phase for frequency ( f) between 0.2 and 9 GHz. For n , 0.3, Ressxxd vs f shows a well-defined peak at fr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f790d6caa8e0172c87e570b54845316
https://doi.org/10.1103/physrevlett.79.1353

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Microwave resonances in low-filling insulating phases of two-dimensional electron and hole systems

Autor: L. W. Engel, Mansour Shayegan, C. C. Li, Dan Shahar, D. C. Tsui

Publikováno v: Physica E: Low-dimensional Systems and Nanostructures. 1:111-115

The conductivity of the high magnetic field insulating phases of two-dimensional electron and hole systems (2DES and 2DHS) of sufficiently low disorder exhibits a resonance at microwave frequency. We present and compare results on this resonance in a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a897660183994eb6986542e41185d6d5
https://doi.org/10.1016/s1386-9477(97)00025-8

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