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Volumn 97, Issue 20, 2010, Pages

An in situ tunable radio-frequency quantum point contact

Author keywords

[No Author keywords available]

Indexed keywords

CHARGE DETECTION; DETECTION SCHEME; FAST CHARGES; IN-SITU; LOW FREQUENCY; MATCHING CIRCUIT; QUANTUM CIRCUIT; QUANTUM POINT CONTACT; RADIO FREQUENCIES; RESONANCE FREQUENCIES; SINGLE-ELECTRON TRANSISTOR CIRCUITS; VARIABLE CAPACITANCE DIODES;

EID: 78649255733     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.3517483     Document Type: Article
Times cited : (29)

References (20)
  • 2
    • 33646861465 scopus 로고    scopus 로고
    • Radio-frequency point-contact electrometer
    • DOI 10.1063/1.2205159
    • H. Qin and D. A. Williams, Appl. Phys. Lett. 0003-6951 88, 203506 (2006). 10.1063/1.2205159 (Pubitemid 43781833)
    • (2006) Applied Physics Letters , vol.88 , Issue.20 , pp. 203506
    • Qin, H.1    Williams, D.A.2
  • 7
    • 78649292466 scopus 로고    scopus 로고
    • The parallel inductance and capacitance transform the small real-valued conductance of the QPC to a complex admittance with large modulus that is dominated by the coil. The imaginary part of this combined impedance is compensated for by the tunable capacitance in series, and only the small real value close to 50 remains.
    • The parallel inductance and capacitance transform the small real-valued conductance of the QPC to a complex admittance with large modulus that is dominated by the coil. The imaginary part of this combined impedance is compensated for by the tunable capacitance in series, and only the small real value close to 50 remains.
  • 8
    • 78649255438 scopus 로고    scopus 로고
    • This voltage changes the length of the depletion layer of the GaAs pn-junction (MA-COM MA46H070).
    • This voltage changes the length of the depletion layer of the GaAs pn-junction (MA-COM MA46H070).
  • 9
    • 58149250918 scopus 로고    scopus 로고
    • Contrary to the predominant matching techniques, the QPC is not directly bonded to the matching circuit but sits in a chip socket, soldered to the high-frequency printed circuit board (pcb) containing the C-LCR matching circuit. This suffers from larger chistray capacitance (∼2.8 pF) but increases the versatility of the setup, as the sample does not have to be designed to fit the pcb. In particular, the setuis compatible with samples fabricated for conventional platforms. See also, 0034-6748,. 10.1063/1.3030860
    • Contrary to the predominant matching techniques, the QPC is not directly bonded to the matching circuit but sits in a chip socket, soldered to the high-frequency printed circuit board (pcb) containing the C-LCR matching circuit. This suffers from larger chip stray capacitance (∼2.8 pF) but increases the versatility of the setup, as the sample does not have to be designed to fit the pcb. In particular, the setup is compatible with samples fabricated for conventional platforms. See also L. J. Taskinen, R. P. Starrett, T. P. Martin, A. P. Micolich, A. R. Hamilton, M. Y. Simmons, D. A. Ritchie, and M. Pepper, Rev. Sci. Instrum. 0034-6748 79, 123901 (2008). 10.1063/1.3030860
    • (2008) Rev. Sci. Instrum. , vol.79 , pp. 123901
    • Taskinen, L.J.1    Starrett, R.P.2    Martin, T.P.3    Micolich, A.P.4    Hamilton, A.R.5    Simmons, M.Y.6    Ritchie, D.A.7    Pepper, M.8
  • 10
    • 78649306889 scopus 로고    scopus 로고
    • QuinStar QCU U-200-2.
    • QuinStar QCU U-200-2.
  • 11
    • 78649305531 scopus 로고    scopus 로고
    • Rohde&Schwarz ZVL/FSL 6.
    • Rohde&Schwarz ZVL/FSL 6.
  • 13
    • 78649311830 scopus 로고    scopus 로고
    • More negative voltages lead to direct current through the forward biased pn -junction; more positive voltages do not alter the diode's capacitance in a significant way
    • More negative voltages lead to direct current through the forward biased pn -junction; more positive voltages do not alter the diode's capacitance in a significant way.
  • 18
    • 78649248392 scopus 로고    scopus 로고
    • In our variable temperature insert, space is too limited. In a standard dilution refrigerator, however, this is easily done.
    • In our variable temperature insert, space is too limited. In a standard dilution refrigerator, however, this is easily done.
  • 19
    • 78649232912 scopus 로고    scopus 로고
    • At good matching, the power dissipated over the QPC is given by the input power and barely influenced by the standing wave.
    • At good matching, the power dissipated over the QPC is given by the input power and barely influenced by the standing wave.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.