2011
DOI: 10.1103/physrevlett.107.027001
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Electrostatic Control of the Evolution from a Superconducting Phase to an Insulating Phase in UltrathinYBa2Cu3O7xFilms

Abstract: The electrical transport properties of ultrathin YBa₂Cu₃O(7-x) films have been modified using an electric double layer transistor configuration employing an ionic liquid. A clear evolution from superconductor to insulator was observed in nominally 7 unit-cell-thick films. Using a finite size scaling analysis, curves of resistance versus temperature, R(T), over the temperature range from 6 to 22 K were found to collapse onto a single scaling function, which suggests the presence of a quantum critical point. How… Show more

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Cited by 167 publications
(97 citation statements)
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“…This picture of superconductivity destroyed by quantum fluctuations at low temperature near critical doping is complementary to its destruction by thermal fluctuations [14][15][16] at higher doping levels. Independently, very similar results were also obtained 39 in YBa 2 Cu 3 O 7-films (although with some details such as the estimated value of z being slightly different), so it is likely that they are universal to the HTS cuprates.…”
Section: Field Effect Superconductivitysupporting
confidence: 66%
“…This picture of superconductivity destroyed by quantum fluctuations at low temperature near critical doping is complementary to its destruction by thermal fluctuations [14][15][16] at higher doping levels. Independently, very similar results were also obtained 39 in YBa 2 Cu 3 O 7-films (although with some details such as the estimated value of z being slightly different), so it is likely that they are universal to the HTS cuprates.…”
Section: Field Effect Superconductivitysupporting
confidence: 66%
“…With ionic liquids or electrolytes as the gate dielectric materials, very high electric fields can be sustained before breakdown occurs, and the resulting charge modulation is on the order of 10 14 -10 15 cm −2 . Using this technique, electrostatic control of the Mott transition [33,34,53,55,58,59] and superconductivity [42,43,51,60] has been reported. The first experiment of using manganite channels in EDLT was carried out by Dhoot et al in 2009 [33].…”
Section: Introductionmentioning
confidence: 99%
“…Much higher electric fields are possible by replacing the conventional gate material with an ionic liquid. Consequently, much higher electrostatically induced charge densities are possible, leading to the control or creation of novel metallic (2-3) and superconducting phases (4)(5)(6)(7). Materials that are insulating by virtue of strong electron-electron correlations, namely Mott-Hubbard and charge-transfer insulators (8), are anticipated to be particularly sensitive to the injection of small numbers of carriers that could result in their metallization (9)(10)(11).…”
mentioning
confidence: 99%