2015
DOI: 10.1088/0957-4484/26/16/165202
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Switching mechanism in two-terminal vanadium dioxide devices

Abstract: Two-terminal thin film VO2 devices show an abrupt decrease of resistance when the current or voltage applied exceeds a threshold value. This phenomenon is often described as a field-induced metal-insulator transition. We fabricate nano-scale devices with different electrode separations down to 100 nm and study how the dc switching voltage and current depend on device size and temperature. Our observations are consistent with a Joule heating mechanism governing the switching. Pulsed measurements show a switchin… Show more

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Cited by 62 publications
(48 citation statements)
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“…4a revealed more than 5 times wider transition voltage in sample B. While the temperature dependent hysteresis data was not provided for brevity, the hysteresis area for both samples decreased as the temperature was increased, similarly to prior reports [22]. The power needed for MIT in sample B decreased linearly with temperature, confirming Joule heating was the predominant switching mechanism for that sample [22].…”
Section: Resultssupporting
confidence: 76%
“…4a revealed more than 5 times wider transition voltage in sample B. While the temperature dependent hysteresis data was not provided for brevity, the hysteresis area for both samples decreased as the temperature was increased, similarly to prior reports [22]. The power needed for MIT in sample B decreased linearly with temperature, confirming Joule heating was the predominant switching mechanism for that sample [22].…”
Section: Resultssupporting
confidence: 76%
“…Электрическое переключение (ЭП) в пленках диокси-да ванадия, обнаруженное еще в начале 70-х годов [1], было и остается предметом многочисленных исследова-ний [2][3][4][5][6][7][8][9][10][11][12]. В работах [1][2][3] высказывалась идея о том, что ЭП в рассматриваемых объектах связан с присущим диоксиду ванадия фазовым переходом " металл-полупро-водник" (ФПМП).…”
Section: Introductionunclassified
“…При том, что длительность перехода из высокоомного в низкоомное состояние определялась в ряде работ [5][6][7][8][9][10][11], практи-чески отсутствуют данные о длительности обратного перехода диоксида ванадия: из низкоомного в высокоом-ное состояние после прохождения импульса напряжения. Единственным исключением является, по-видимому, ра-бота [16], в которой представлены результаты иссле-дования эффекта ЭП в структурах на основе NbO 2 , где переключение связано с ФПМП, имеющем место в диоксиде ниобия при значительно более высокой по сравнению с VO 2 температуре (1070 K) [17].…”
Section: Introductionunclassified
“…VO 2 holds great potential for beyond CMOS electronics because the MIT can be induced by electrical excitations, enabling applications based on volatile resistive switching. The VO 2 -based MIT switch in 2-terminal configuration shows interesting properties such as abrupt increase in current with applied voltage 23–31 , fast switching time 3234 , high reliability 35, 36 , negative differential resistance 3740 , memristive switching 41, 42 and low temperature dependence of transition dynamics 43, 44 . However, the main drawback of the 2-terminal MIT switch is the relatively high leakage current I OFF due to the small bandgap of VO 2 in the insulating state.…”
Section: Introductionmentioning
confidence: 99%