A Kondo insulating memristor

Kim, D. J.; Fisk, Z.

doi:10.1063/1.4733328

Cited by 12 publications

(11 citation statements)

References 17 publications

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“…Quantum-impurity systems are of great interest because of their fundamental physics as well as potential applications as possible quantum-computing devices [1], such as single-molecule magnets [2,3] and bulk Kondo insulators [4]. The investigation of transport in quantum-impurity systems is of great importance to understand the phase coherence of electrons in nanodevices.…”

Section: Introductionmentioning

confidence: 99%

Time-dependent transport through quantum-impurity systems with Kondo resonance

et al. 2015

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We investigate the time-dependent transport properties of single and double quantum-impurity systems based on the hierarchical equations of motion (HEOM) approach. In the Kondo regime, the dynamical current oscillates with time in both cases due to the temporal coherence of electrons tunneling through the device, which shares the same mechanism as the single-level resonance without e-e interactions, but shows some different characteristics. For single quantum-impurity systems, the temperature T has an inhibitory effect on the oscillations of dynamic current through its suppression of the Kondo effects. The amplitude of the current oscillations is attenuated by the e-e interaction U in the Kondo regime. The frequency of the current oscillations is found almost independent of T and U. For parallel-coupling double quantum-impurity systems, the oscillation of the current shows similar behavior to the single one, but with two-to-three times larger amplitudes. At the limit of small interimpurity coupling the oscillation of the current exhibits enhanced characters, while it is weakened at the other limit.

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Section: Introductionmentioning

confidence: 99%

Time-dependent transport through quantum-impurity systems with Kondo resonance

et al. 2015

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“…The pinched hysteresis loops in Figs. 3(a)-3(e) with low frequencies reflect the development of virtual thermal impedance [18]. The energy balance can be described by generated energy ðÁPÞ ¼ stored energy ðCdðÁTÞ=dtÞ þ dissipative energy (DÁT), where ÁT is the temperature variation corresponding to power variation ÁP, C the specific heat, and D the dissipation constant.…”

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confidence: 99%

“…The final state does not have any frequency dependence, suggesting that its impedance is very resistive. This implies that SmB 6 is not in the class of Chua's memristor [18,19]. The sample used in Figs.…”

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confidence: 99%

Limit Cycle and Anomalous Capacitance in the Kondo InsulatorSmB6

2012

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We report a frequency coding limit cycle and anomalous capacitance in the Kondo insulator SmB6 at low temperatures where the insulating gap becomes fully opened. The limit cycle appears to be associated with local activity and autocatalytic temporal pattern formation, as occurs in biological systems. The measured anomalous capacitance may indicate surface and bulk separation, suggesting the formation of a surface conducting state. The biological analogy suggests lossless information transport and complex information coding, and the surface state with a superconductor would provide a possible venue for quantum computing resources without decoherence.

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“…11). This is very useful for synchronous IV measurement, 14,15 atomic manipulation, 8 deposition and surface checkup. 11 For example, when the surface has oxide islands, the irregular topography could lead to tip crash or contamination on the island areas.…”

Section: A Scanning Probe Microscopementioning

confidence: 99%

A LabVIEW based template for user created experiment automation

Kim

Fisk

2012

Review of Scientific Instruments

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We have developed an expandable software template to automate user created experiments. The LabVIEW based template is easily modifiable to add together user created measurements, controls, and data logging with virtually any type of laboratory equipment. We use reentrant sequential selection to implement sequence script making it possible to wrap a long series of the user created experiments and execute them in sequence. Details of software structure and application examples for scanning probe microscope and automated transport experiments using custom built laboratory electronics and a cryostat are described.

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A Kondo insulating memristor

Cited by 12 publications

References 17 publications

Time-dependent transport through quantum-impurity systems with Kondo resonance

Time-dependent transport through quantum-impurity systems with Kondo resonance

Limit Cycle and Anomalous Capacitance in the Kondo InsulatorSmB6

A LabVIEW based template for user created experiment automation

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