2016
DOI: 10.1063/1.4968825
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Negative differential resistance in n-type noncompensated silicon at low temperature

Abstract: We present the results on low temperature current-voltage characteristics of noncompensated Si doped by Sb. In the temperature range 1.9–2.25 K and at electrical fields smaller than 1 V/cm, the negative differential resistance (NDR) was observed. The external magnetic field enhances the region of the NDR. We attribute this effect to the delocalization of the D− states in the upper Hubbard band due to the accumulation of the charge injected by current.

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Cited by 9 publications
(19 citation statements)
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“…На начальных участках ВАХ механизм переноса заряда в основном активационного типа вследствие захвата носителей заряда нейтральными D 0 состояниями нижней зоны Хаббарда и их трансформации в Dсостояния верхней зоны Хаббарда (ВЗХ) [6]. В этом случае наблюдается отрицательный ТКС [5,6]. Рост тока сопровождается резким уменьшением R и кроссовером к положительному знаку ТКС.…”
Section: Discussionunclassified
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“…На начальных участках ВАХ механизм переноса заряда в основном активационного типа вследствие захвата носителей заряда нейтральными D 0 состояниями нижней зоны Хаббарда и их трансформации в Dсостояния верхней зоны Хаббарда (ВЗХ) [6]. В этом случае наблюдается отрицательный ТКС [5,6]. Рост тока сопровождается резким уменьшением R и кроссовером к положительному знаку ТКС.…”
Section: Discussionunclassified
“…Образцы помещались в криогенную вставку (Cryogenic Ltd., London) со сверхпроводящим магнитом. Подробнее детали эксперимента описаны в работах [5,6].…”
Section: результатыunclassified
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“…In the interval 2-4 K the conductivity is governed by the HG and the charge transport is associated mainly with the spin dependent hopping in the UHB. To improve the identification of the observed Mott-type VRH-SAD crossover and enhance the temperature interval of SAD the energy range of the impurity states as well as the level of the injection of the electrons should be increased [63].…”
Section: Discussionmentioning
confidence: 99%
“…The presence of nonsmeared HG between Hubbard bands in the range 2-4 K together with the spin dependent hops in the UHB provides reentrance of the SAD. The latter provides a nonlinearity of the currentvoltage characteristics at small bias voltage, which leads to negative differential resistance at electrical fields smaller than 1 V/cm [63]. It is unlikely that this effect may be due to the ES VRH, for which the delocalization occurs at significantly higher electrical fields.…”
Section: Gap In the Dosmentioning
confidence: 99%