The Tunneling Field-Effect Transistor (TFET) is a promising device for future low-power logic. Its performance is often predicted using semiclassical simulations, but there is usually a large discrepancy with experimental results. An important reason is that Field-Induced Quantum Confinement (FIQC) is neglected. Quantum mechanical simulations show FIQC delays the onset of Band-To-Band Tunneling (BTBT) with hundreds of millivolts in the promising line-TFET configuration. In this letter, we provide experimental verification of this delayed onset. We accomplish this by developing a method where line-TFET are modeled using highly doped MOS capacitors (MOS-CAP). Using capacitance-voltage measurements, we demonstrate AC inversion by BTBT, which was so far unobserved in MOS-CAP. Good agreement is shown between the experimentally obtained BTBT onset and quantum mechanical predictions, proving the need to include FIQC in all TFET simulations. Finally, we show that highly doped MOS-CAP is promising for characterization of traps deep into the conduction band.
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17 November 2014
Research Article|
November 18 2014
Impact of field-induced quantum confinement on the onset of tunneling field-effect transistors: Experimental verification
Quentin Smets;
Quentin Smets
a)
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
2
KULeuven
, 3000 Leuven, Belgium
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Anne S. Verhulst;
Anne S. Verhulst
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Koen Martens;
Koen Martens
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Han Chung Lin;
Han Chung Lin
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Salim El Kazzi;
Salim El Kazzi
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Devin Verreck;
Devin Verreck
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
2
KULeuven
, 3000 Leuven, Belgium
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Eddy Simoen;
Eddy Simoen
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Nadine Collaert;
Nadine Collaert
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Aaron Thean;
Aaron Thean
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
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Jean-Pierre Raskin;
Jean-Pierre Raskin
3ICTEAM,
Université catholique de Louvain
, 1348 Louvain-la-Neuve, Belgium
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Marc M. Heyns
Marc M. Heyns
1
Imec
, Kapeldreef 75, 3001 Heverlee, Belgium
2
KULeuven
, 3000 Leuven, Belgium
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a)
Electronic mail: [email protected]
Appl. Phys. Lett. 105, 203507 (2014)
Article history
Received:
September 24 2014
Accepted:
November 07 2014
Citation
Quentin Smets, Anne S. Verhulst, Koen Martens, Han Chung Lin, Salim El Kazzi, Devin Verreck, Eddy Simoen, Nadine Collaert, Aaron Thean, Jean-Pierre Raskin, Marc M. Heyns; Impact of field-induced quantum confinement on the onset of tunneling field-effect transistors: Experimental verification. Appl. Phys. Lett. 17 November 2014; 105 (20): 203507. https://doi.org/10.1063/1.4902117
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