<P>We performed a precision measurement of the current from a single-parameter electron pump, where the potential-profile for a quantum dot was manipulated by multiple top-metal gates. In an optimally tuned condition, driven with a sinusoidal-wa...
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https://www.riss.kr/link?id=A107479462
2015
-
SCI,SCIE,SCOPUS
학술저널
195-200(6쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
<P>We performed a precision measurement of the current from a single-parameter electron pump, where the potential-profile for a quantum dot was manipulated by multiple top-metal gates. In an optimally tuned condition, driven with a sinusoidal-wa...
<P>We performed a precision measurement of the current from a single-parameter electron pump, where the potential-profile for a quantum dot was manipulated by multiple top-metal gates. In an optimally tuned condition, driven with a sinusoidal-waveform microwave at <I>f</I> = 0.95 GHz, <I>B</I> = 11 T, and <I>T</I> = 0.3 K, the relative deviation of the pump current from <I>ef</I>, <I>δI</I><SUB><I>p</I></SUB>/<I>ef</I>?≡?(<I>I</I><SUB><I>p</I></SUB>?−?<I>ef</I>)/<I>ef</I> was measured to be (−0.92 ??? 1.37) ppm. Our experiment reproduces the current quantisation accuracy of a previous measurement of a single-parameter pump, but in a device fabricated using very different geometry, thereby indicating that accurate single-parameter pumping is insensitive to device details.</P>