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Strain-induced enhancement of electric quadrupole splitting in resistively detected nuclear magnetic resonance spectrum in quantum Hall systems
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10.1063/1.3291618
/content/aip/journal/apl/96/3/10.1063/1.3291618
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/3/10.1063/1.3291618
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Energy diagram of nuclear spin system for (left) and (right). (b) Micrograph of the Hall-bar device. A pulsed rf-magnetic field is irradiated using the metal strip covering the 5- -wide conduction channel.

Image of FIG. 2.
FIG. 2.

[(a)–(c)] NMR spectra obtained using the Hall-bar device before it was coated with a polyimide film. . Values of are 35.520 MHz (a), 49.808 MHz (b), and 63.286 MHz (c). [(d)–(f)] NMR spectra obtained using the Hall-bar device after it was coated with the polyimide film. . Values of are 41.963 MHz (d), 58.847 MHz (e), and 74.771 MHz (f). The solid curves are the fitting curves.

Image of FIG. 3.
FIG. 3.

Changes in induced by applying a pulse of with various pulse durations at . The frequencies of are 41.952 MHz (a), 41.987 MHz (b), and 42.022 MHz (c) in (a), and 41.969 MHz (d) and 42.007 MHz (e) in (b). The curves are offset for clarity. The inset in (a) shows schematic energy diagram for single- and two-photon absorption/emission. The inset in (b) shows the NMR spectrum of with the input rf-voltage .

Image of FIG. 4.
FIG. 4.

(a) Decay of spin-echo signal obtained in the Hall-bar device before the polyimide coating. . [(b) and (c)] Decays of spin-echo signals obtained in the Hall-bar device after the polyimide coating. . In the case of (c), the electrons were depleted during the rf-pulse irradiation. The inset of (a) shows a schematic of the pulse sequence for the spin-echo measurements. The inset of (b) shows a representative spin-echo signal obtained by changing with a fixed .

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/content/aip/journal/apl/96/3/10.1063/1.3291618
2010-01-19
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Strain-induced enhancement of electric quadrupole splitting in resistively detected nuclear magnetic resonance spectrum in quantum Hall systems
http://aip.metastore.ingenta.com/content/aip/journal/apl/96/3/10.1063/1.3291618
10.1063/1.3291618
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