Observation of a pulse-duration memory effect in K0.30MoO3

R. M. Fleming, Lynn Schneemeyer

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Abstract

We have observed a new memory effect related to metastable states of a moving charge-density wave (CDW) in K0.30MoO3. At 45 K we find that the transient oscillations seen in the leading edge of current or voltage pulses are influenced by the duration of the preceding pulse. For repetitive pulses this results in an unusual waveform where the phase of the last oscillation in a pulse is anomalously large and phase locked to the trailing edge of the pulse. The phase of the initial oscillation remains phase locked to the leading edge of the pulse. If one changes the pulse width in a string of repetitive pulses, the anomalous shape of the waveform is attained by the second pulse at the new width. These results suggest that information about the width of a pulse is contained in the phase configuration of the pinned charge-density-wave state present between pulses. The effect of a pulse, on average, is to advance the CDW phase by integral multiples of 2π.

Original languageEnglish
Pages (from-to)2930-2932
Number of pages3
JournalPhysical Review B
Volume33
Issue number4
DOIs
StatePublished - 1 Jan 1986

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pulse duration
pulses
leading edges
waveforms
transient oscillations
oscillations
trailing edges
metastable state
strings
electric potential
configurations

Cite this

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abstract = "We have observed a new memory effect related to metastable states of a moving charge-density wave (CDW) in K0.30MoO3. At 45 K we find that the transient oscillations seen in the leading edge of current or voltage pulses are influenced by the duration of the preceding pulse. For repetitive pulses this results in an unusual waveform where the phase of the last oscillation in a pulse is anomalously large and phase locked to the trailing edge of the pulse. The phase of the initial oscillation remains phase locked to the leading edge of the pulse. If one changes the pulse width in a string of repetitive pulses, the anomalous shape of the waveform is attained by the second pulse at the new width. These results suggest that information about the width of a pulse is contained in the phase configuration of the pinned charge-density-wave state present between pulses. The effect of a pulse, on average, is to advance the CDW phase by integral multiples of 2π.",
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Observation of a pulse-duration memory effect in K0.30MoO3. / Fleming, R. M.; Schneemeyer, Lynn.

In: Physical Review B, Vol. 33, No. 4, 01.01.1986, p. 2930-2932.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - We have observed a new memory effect related to metastable states of a moving charge-density wave (CDW) in K0.30MoO3. At 45 K we find that the transient oscillations seen in the leading edge of current or voltage pulses are influenced by the duration of the preceding pulse. For repetitive pulses this results in an unusual waveform where the phase of the last oscillation in a pulse is anomalously large and phase locked to the trailing edge of the pulse. The phase of the initial oscillation remains phase locked to the leading edge of the pulse. If one changes the pulse width in a string of repetitive pulses, the anomalous shape of the waveform is attained by the second pulse at the new width. These results suggest that information about the width of a pulse is contained in the phase configuration of the pinned charge-density-wave state present between pulses. The effect of a pulse, on average, is to advance the CDW phase by integral multiples of 2π.

AB - We have observed a new memory effect related to metastable states of a moving charge-density wave (CDW) in K0.30MoO3. At 45 K we find that the transient oscillations seen in the leading edge of current or voltage pulses are influenced by the duration of the preceding pulse. For repetitive pulses this results in an unusual waveform where the phase of the last oscillation in a pulse is anomalously large and phase locked to the trailing edge of the pulse. The phase of the initial oscillation remains phase locked to the leading edge of the pulse. If one changes the pulse width in a string of repetitive pulses, the anomalous shape of the waveform is attained by the second pulse at the new width. These results suggest that information about the width of a pulse is contained in the phase configuration of the pinned charge-density-wave state present between pulses. The effect of a pulse, on average, is to advance the CDW phase by integral multiples of 2π.

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