{"title":"2D Ferroelectric $pmb{mathrm{CuInP}_{2}mathrm{S}_{6}}$: Synthesis, ReRAM, and FeRAM","authors":"Pai-Ying Liao, M. Si, G. Qiu, P. Ye","doi":"10.1109/DRC.2018.8442257","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442257","url":null,"abstract":"2D ferroelectric-gated field-effect transistors are promising for future non-volatile memory and low-power logic applications, to combine the advantage of both 2D semiconductors and ferroelectric insulators [1]–[3]. However, the non-ideal 2D semiconductor/3D insulator interface results in interface traps which degrade the device performance, variability and reliability. To integrate 2D semiconductor together with 2D ferroelectric insulator as 2D van der Waals heterostructure ferroelectric field-effect transistors (Fe-FETs) can eliminate the interface trap issue and achieve ideal insulator/semiconductor interface in principle. Copper indium thiophosphate $(mathrm{CuInP}_{2}mathrm{S}_{6}$, CIPS) is a novel two-dimensional (2D) ferroelectric material with layered single crystal structure and decent ambient stability [4]–[6]. Furthermore, it illustrates not only clear room temperature ferroelectric property with Curie point around 315 K, but also ferroelectric resistive switching characteristic.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128730255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soaram Kim, Sean Gorman, Yongchang Dong, A. Rao, G. Koley
{"title":"Self-powered Flexible Strain Sensor with Graphene/P(VDF-TrFE) Heterojunction","authors":"Soaram Kim, Sean Gorman, Yongchang Dong, A. Rao, G. Koley","doi":"10.1109/DRC.2018.8442195","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442195","url":null,"abstract":"The world of wearable technology is making use of strain sensors in human monitoring, and the use of data can range from improving the lifestyle to improving safety in the workplace, i.e. smart monitoring systems, wearable biomedical health care, and real-time gait analysis [1]–[3]. Long-term stability, fast response time, self-powered operation, low cost and simplicity of the fabrication process are the preferred attributes in piezoresistive based strain sensors. In this work, we have simply fabricated a self-powered flexible strain sensor with graphene/P(VDF - TrFE) heterojunction on polyethylene terephthalate (PET) substrate. The graphene/P(VDF - TrFE) heterojunction makes the sensor a good candidate for a piezoresistive based strain sensor due to the unique properties of graphene such as high carrier mobility, mechanical strength flexibility, and tunable Fermi level based on surface charge.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127760740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. Deshmukh, M. Muñoz-Rojo, E. Yalon, S. Vaziri, E. Pop
{"title":"Probing Self-Heating in RRAM Devices by Sub-100 nm Spatially Resolved Thermometry","authors":"S. Deshmukh, M. Muñoz-Rojo, E. Yalon, S. Vaziri, E. Pop","doi":"10.1109/DRC.2018.8442187","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442187","url":null,"abstract":"Resistive memory (RRAM) is a promising technology for high density, non-volatile data storage. Metal-oxide RRAM involves forming and breaking conductive filaments (CF) in an oxide like Hf02 as the mechanism of data storage. CFs are sub-50 nm in diameter [1], causing sharp temperature gradients within the RRAM oxide. However, imaging individual CFs in RRAM devices is challenging due to their nanoscale size and the presence of the top electrode (TE). While previous works have performed electrical [2] or optical averaging [3] of CF temperature, evaluating the heating of a single CF within RRAM has remained an open problem.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127762933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Higashiwaki, M. Wong, T. Kamimura, Y. Nakata, Chia-Hung Lin, R. Lingaparthi, A. Takeyama, T. Makino, T. Ohshima, N. Hatta, K. Yagi, K. Goto, K. Sasaki, Shinya Watanabe, A. Kuramata, S. Yamakoshi, K. Konishi, H. Murakami, Y. Kumagai
{"title":"Recent Advances in Ga2O3 MOSFET Technologies","authors":"M. Higashiwaki, M. Wong, T. Kamimura, Y. Nakata, Chia-Hung Lin, R. Lingaparthi, A. Takeyama, T. Makino, T. Ohshima, N. Hatta, K. Yagi, K. Goto, K. Sasaki, Shinya Watanabe, A. Kuramata, S. Yamakoshi, K. Konishi, H. Murakami, Y. Kumagai","doi":"10.1109/DRC.2018.8442156","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442156","url":null,"abstract":"Historically, the exploration of III-V compound semiconductors has begun with small bandgap materials and proceeded to large bandgap ones in recent years, that is, from GaAs-based compounds to GaN-based ones. We consider that gallium oxide (Ga2O3) is no exception in following this history and is poised to become the next mainstream of compound semiconductor research due to its attractive material properties based on an extremely large bandgap of about 4.5 eV [1]. This bandgap energy is not only much larger than those of representative wide bandgap semiconductors such as GaN and SiC but also unique among single-crystal semiconductors. Furthermore, Ga2O3 has another important advantage for commercialization over the other wide bandgap materials in that large-size, high-quality bulk single crystals can be synthesized by melt growth methods, thus allowing native substrates to be produced at a relatively low cost [2]. Recently, these two features have drawn much attention to Ga2O3, resulting in a rapid expansion of the Ga2O3 community.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134131276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Time Response of Polarization Switching in Ge Hafnium Zirconium Oxide Nanowire Ferroelectric Field-effect Transistors","authors":"Sami Alghamdi, W. Chung, M. Si, P. Ye","doi":"10.1109/DRC.2018.8442218","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442218","url":null,"abstract":"Negative-capacitance field-effect transistors (NC-FETs) or ferroelectric field-effect transistors (Fe-FETs), realized by replacing high-k dielectric in metal-oxide-semiconductor field-effect transistors (MOSFETs) with a ferroelectric insulator, have been extensively studied recently for potential digital logic or non-volatile memory applications. Steep-slope NC-FETs have attracted a lot of attention to break the Boltzmann limit of subthreshold swing (SS) in a MOSFET. Hysteresis-free sub-60 mV/dec NC-FETs at room temperature have been demonstrated very recently by static DC measurements1-3. However, one of the major concerns in NC-FETs is its operating speed, which might be limited by the slow polarization reversal in ferroelectric films due to heavy atom re-positioning4,5. A Fe-FET is a proper structure to study the ferroelectric switching speed due to the very pronounced counterclockwise hysteresis loop in its transfer curve, and it is used as a detector to measure the switch speed of the ferroelectric gate.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132338944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
I. Jahangir, Md. A. Uddin, A. Singh, A. Franken, M. V. S. Chandrashekha, G. Koley
{"title":"Surface Passivated InN Nanowire and Graphene Heterojunction Based Memtransistor","authors":"I. Jahangir, Md. A. Uddin, A. Singh, A. Franken, M. V. S. Chandrashekha, G. Koley","doi":"10.1109/DRC.2018.8442135","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442135","url":null,"abstract":"Since the discovery of graphene, there have been countless attempts to utilize its exceptional electronic, optical and mechanical properties. Forming a mixed dimensional heterojunction between graphene and a zero or one dimensional material (quantum dot or nanowire) can unlock even more interesting applications. These applications range from RF devices to highly sensitive chemical sensors [1]–[4]. In our prior works [4]–[5], we demonstrated some interesting results on graphene/InN heterojunction, where an electrically tunable Schottky barrier could be formed between graphene and InN nanowires using oxygen plasma based passivation of the nanowires. In this work, we demonstrate the electrically tunable memristive behavior of such graphene/InN nanowire based barristors (gate controlled Schottky barrier transistor).","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"153 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123598182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of Threshold Switch OFF -State Resistance on Performance Enhancement in 2D Mos2 Phase-FETs","authors":"B. Grisafe, S. Datta","doi":"10.1109/DRC.2018.8442233","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442233","url":null,"abstract":"Volatile threshold switch (TS) devices, which display abrupt changes in conductivity in response to external stimuli such as temperature or electric field, are currently being explored for uses in novel electronic devices [1]–[3]. One such device, Phase-FET, integrates a TS with the source ofa conventional MOSFET such that the abrupt threshold switching phenomena and variable resistance states can be harnessed to produce steep sub-kT/q <60 mV/dec) switching, enabling enhanced ION at reduced supply voltage for a given IOFF [4], [5]. Achieving these characteristics, however, requires careful design of the TS OFF -state resistance with respect to the MOSFET channel resistance. In this work, we experimentally demonstrate the importance of TS OFF-state resistance on Mo'Sj-bascd Phase-FET performance using VO2 and Ag/Hf02/Pt TS devices to show 30x enhanced ION (at matched $mathrm{I}_{mathrm{OFF}}$) over baseline MOSFET when TS and MOSFET OFF-state resistance are matched.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127630275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wenshen Li, K. Nomoto, Zongyang Hu, N. Tanen, K. Sasaki, A. Kuramata, D. Jena, H. Xing
{"title":"1.5 kV Vertical Ga2O3 Trench-MIS Schottky Barrier Diodes","authors":"Wenshen Li, K. Nomoto, Zongyang Hu, N. Tanen, K. Sasaki, A. Kuramata, D. Jena, H. Xing","doi":"10.1109/DRC.2018.8442245","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442245","url":null,"abstract":"$beta-mathrm{Ga}_{2}mathrm{O}_{3}$ electronic devices for high power applications have seen rapid development over the recent years, due to the excellent material properties including an extremely large band-gap, high critical electric field, decent electron mobility and the availability of low-cost bulk substrates. As unipolar devices, Ga2O3 vertical Schottky barrier diodes (SBDs) have fast switching capability, while enjoying all the superior properties of Ga2O3. With the development of halide vapor phase epitaxy (HVPE) capable of delivering high quality thick n– epitaxial layers [1], $mathrm{Ga}_{2}mathrm{O}_{3}$ vertical SBDs have shown promising results with up to 1 kV breakdown voltage (BV) together with decent on-resistance $(mathrm{R}_{mathrm{on}})$ of $2-6 mathrm{m}Omegacdot mathrm{cm}^{2} [1-3]$. However, the results are still far from the projected performance which surpasses GaN and SiC [4]. One important reason is the high reverse leakage current due to the high surface electric field, which causes thermionic-field emission and barrier height lowering, especially at the device edge where field crowding occurs. The leakage current can be much reduced by edge termination techniques such as field-plating [3]. More effectively, a trench-metal-insulator-semiconductor (MIS) structure can be utilized to reduce the leakage current [5], taking advantage of the reduced surface field (RESURF) effect [6]. In this work, we demonstrate Ga2O3 trench-MIS SBDs with a record-high 1.5 kV breakdown voltage without edge termination, together with a ~104 times reduction in reverse leakage current compared with regular SBDs.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129154719","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Energy-Efficient, Two-Dimensional Analog Memory for Neuromorphic Computing","authors":"M. Sharbati, Yanhao Du, Feng Xiong","doi":"10.1109/DRC.2018.8442140","DOIUrl":"https://doi.org/10.1109/DRC.2018.8442140","url":null,"abstract":"Unlike modern computers that use digital ‘0’ and ‘1’ for computation, neural networks in human brains exhibit analog changes in neural connections (i.e. synaptic weight) during the decision-making and learning processes. This analog nature as well as the neural network's massive parallelism are partly why human brains (~20 W) are much better at complex tasks such as pattern recognition than even the most powerful computers (~1 MW) with significantly better energy efficiency. Currently, majority of the research efforts towards developing artificial neural networks are based on digital technology with CMOS devices [1], which cannot mimic the analog behaviors of biological synapses and thus energy-extensive. Recently, emerging memory devices such as phase change memory (PCM), resistive random access memory (RRAM), and spin-torque transfer (STT) RAM [2]–[4] have been studied to mimic synaptic connections with their programmable conductance. While these approaches are promising, they still face various limitations such as poor controllability, subpar reliability, large variability, and non-symmetrical resistance response.","PeriodicalId":269641,"journal":{"name":"2018 76th Device Research Conference (DRC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122923063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}