scholarly journals Negative capacitance effects in ferroelectric heterostructures: A theoretical perspective

2021 ◽  
Vol 129 (8) ◽  
pp. 080901
Author(s):  
Atanu K. Saha ◽  
Sumeet K. Gupta
Keyword(s):  
Theoretical Perspective ◽  
Negative Capacitance ◽  
Capacitance Effects

Trade-off between interfacial charge and negative capacitance effects in the Hf-Zr-Al-O/Hf0.5Zr0.5O2 bilayer system

2020 ◽  
Vol 174 ◽  
pp. 107914
Author(s):  
Dipjyoti Das ◽  
Taeho Kim ◽  
Venkateswarlu Gaddam ◽  
Changhwan Shin ◽  
Sanghun Jeon
Keyword(s):  
Negative Capacitance ◽  
Trade Off ◽  
Bilayer System ◽  
Capacitance Effects ◽  
Interfacial Charge

Negative capacitance effects in semiconductor diodes

1998 ◽  
Vol 107 (2) ◽  
pp. 47-50 ◽  
Author(s):  
B.K. Jones ◽  
J. Santana ◽  
M. McPherson
Keyword(s):  
Negative Capacitance ◽  
Capacitance Effects

scholarly journals Observation of negative capacitance in antiferroelectric PbZrO3 Films

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Leilei Qiao ◽  
Cheng Song ◽  
Yiming Sun ◽  
Muhammad Umer Fayaz ◽  
Tianqi Lu ◽  
...  
Keyword(s):  
Polarization Vector ◽  
Boltzmann Distribution ◽  
Ferroelectric Materials ◽  
Negative Capacitance ◽  
Capacitance Effect ◽  
External Resistor ◽  
In Series ◽  
The Rich ◽  
Capacitance Effects ◽  
Free Energy Analysis

AbstractNegative capacitance effect in ferroelectric materials provides a solution to the energy dissipation problem induced by Boltzmann distribution of electrons in conventional electronics. Here, we discover that besides ferroelectrics, the antiferroelectrics based on Landau switches also have intrinsic negative capacitance effect. We report both the static and transient negative capacitance effect in antiferroelectric PbZrO3 films and reveal its possible physical origin. The capacitance of the capacitor of the PbZrO3 and paraelectric heterostructure is demonstrated to be larger than that of the isolated paraelectric capacitor at room temperature, indicating the existence of the static negative capacitance. The opposite variation trends of the voltage and charge transients in a circuit of the PbZrO3 capacitor in series with an external resistor demonstrate the existence of transient negative capacitance effect. Strikingly, four negative capacitance effects are observed in the antiferroelectric system during one cycle scan of voltage pulses, different from the ferroelectric counterpart with two negative capacitance effects. The polarization vector mapping, electric field and free energy analysis reveal the rich local regions of negative capacitance effect with the negative dP/dE and (δ2G)⁄(δD2), producing stronger negative capacitance effect. The observation of negative capacitance effect in antiferroelectric films significantly extends the range of its potential application and reduces the power dissipation further.

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