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Toward High Temperature Quasi-two-dimensional Superconductivity
Superconductivity · Submitted 22 Feb 2018
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We predict a possibility of a high temperature guasi-two-dimensional superconductivity state.
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The abstract, sentence by sentence
The demonstration of a quasi-two-dimensional electron gas (2DEG) and superconducting properties in LaAlO$_3$/SrTiO$_3$ heterostructures has stimulated intense research activity in recent ten years. The 2DEG has unique properties that are promising for applications in all-oxide electronic devices. The superconductivity in such heterostructures has been observed below 300 mK. For superconductivity applications it is desirable to have more wide temperature of the existence range and the ability to control superconductivity properties by external stimulus. Based on first-principles calculations and theoretical consideration we show that all-oxide heterostructures incorporating ferroelectric constituent, such as BaTiO$_3$/La$_2$CuO$_4$, allow creating 2DEG. We predict a possibility of a high temperature guasi-two-dimensional superconductivity state. This state could be switchable between superconducting and conducting states by ferroelectric polarization reversal. We also discuss that such structures must be more simple for preparation. The proposed concept of ferroelectrically controlled interface superconductivity offers the possibility to design novel electronic devices.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The demonstration of a quasi-two-dimensional electron gas (2DEG) and superconducting properties in LaAlO$_3$/SrTiO$_3$ heterostructures has stimulated intense research activity in recent ten years. | background 1.00 | 0.06 | 0.02 | asserted 1.00 |
| s1 | The 2DEG has unique properties that are promising for applications in all-oxide electronic devices. | background 1.00 | 0.06 | 0.02 | asserted 0.86 |
| s2 | The superconductivity in such heterostructures has been observed below 300 mK. | background 0.98 | 0.07 | 0.02 | asserted 1.00 |
| s3 | For superconductivity applications it is desirable to have more wide temperature of the existence range and the ability to control superconductivity properties by external stimulus. | gap 0.61 | 0.05 | 0.03 | asserted 0.88 |
| s4 | Based on first-principles calculations and theoretical consideration we show that all-oxide heterostructures incorporating ferroelectric constituent, such as BaTiO$_3$/La$_2$CuO$_4$, allow creating 2DEG. | contribution 0.68 | 0.90 | 0.14 | asserted 1.00 |
| s5 | We predict a possibility of a high temperature guasi-two-dimensional superconductivity state. | result 0.78 | 0.83 | 0.76 | hedged possibility 0.92 |
| s6 | This state could be switchable between superconducting and conducting states by ferroelectric polarization reversal. | result 0.64 | 0.54 | 0.23 | hedged possibility 1.00 |
| s7 | We also discuss that such structures must be more simple for preparation. | interpretation 0.72 | 0.20 | 0.04 | hedged possibility 0.55 |
| s8 | The proposed concept of ferroelectrically controlled interface superconductivity offers the possibility to design novel electronic devices. | interpretation 0.94 | 0.27 | 0.34 | hedged possibility 0.99 |
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The paper
Original abstract
The demonstration of a quasi-two-dimensional electron gas (2DEG) and superconducting properties in LaAlO$_3$/SrTiO$_3$ heterostructures has stimulated intense research activity in recent ten years. The 2DEG has unique properties that are promising for applications in all-oxide electronic devices. The superconductivity in such heterostructures has been observed below 300 mK. For superconductivity applications it is desirable to have more wide temperature of the existence range and the ability to control superconductivity properties by external stimulus. Based on first-principles calculations and theoretical consideration we show that all-oxide heterostructures incorporating ferroelectric constituent, such as BaTiO$_3$/La$_2$CuO$_4$, allow creating 2DEG. We predict a possibility of a high temperature guasi-two-dimensional superconductivity state. This state could be switchable between superconducting and conducting states by ferroelectric polarization reversal. We also discuss that such structures must be more simple for preparation. The proposed concept of ferroelectrically controlled interface superconductivity offers the possibility to design novel electronic devices.
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