One bipolar selector-one resistor for flexible crossbar memory applications

Dayanand Kumar, Rakesh Aluguri, Umesh Chand, Tseung-Yuen Tseng*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


A bipolar, highly nonlinear n-p-n selector is coupled in series with resistive switching memory device to suppress the sneak path current. The memory characteristics are measured for the crossbar array fabricated on a flexible polyethylene terephthalate substrate. Dominant conduction mechanism is the Zener tunneling to obtain the high nonlinearity in the selector device. This phenomenon validates the I–V characteristics which are temperature dependent, which leads to decrease in the turn-on voltage of the device as the temperature increases. The proposed one bipolar selector-one resistor device demonstrates better memory characteristics with the high nonlinearity (∼10 3 ), observable memory window of about one order, excellent ac endurance (10 7 ) cycles, fast switching speed (60 ns), and stable retention (10 4 s) at 100 °C. The results show the substantial potential of the proposed one selector-one resistor structure in suppressing the leakage current, making it attractive for future high-density flexible crossbar memory array.

Original languageEnglish
Article number8649809
Pages (from-to)1296-1301
Number of pages6
JournalIEEE Transactions on Electron Devices
Issue number3
StatePublished - Mar 2019


  • One selector-one resistor (1S1R)
  • Resistive random access memory (RRAM)
  • Resistive switching
  • Zener tunneling


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