Ferroelectricity, Superconductivity, and SrTiO3—Passions of K.A. Müller
Ferroelectricity, Superconductivity, and SrTiO3—Passions of K.A. Müller
复制标题
铁电性、超导性和 SrTiO3——K.A. 的激情
作者：
G. Scheerer;M. Boselli;D. Pulmannová;C. Rischau;Adrien Waelchli;S. Gariglio;E. Giannini;D. van der Marel;J. Triscone
SrTiO 3是一种绝缘材料，通过化学掺杂、压力、应变或同位素替代，可以变成铁电材料或超导体。材料本身以及上述两种现象一直是Karl Alex Müller深入研究的主题，并且是他获得诺贝尔奖的高温超导研究的灵感来源。一个有趣的悬而未决的问题是，在同一种材料中出现铁电性和超导性是否只是巧合，或者是否存在更深层次的联系。此外，还有一个经验问题，即这两种现象如何相互作用。在这里，我们表明，它是可能的，在二维层的界面处的SrTiO 3和LaAlO 3诱导超导电性时，我们使SrTiO 3铁电体通过18 O替代。我们的实验表明，铁电性是完全兼容的超导二维电子系统在界面上。这为在非中心对称环境中操纵超导性提供了一条很有前途的途径。
SrTiO3 is an insulating material which, using chemical doping, pressure, strain or isotope substitution, can be turned into a ferroelectric material or into a superconductor. The material itself, and the two aforementioned phenomena, have been subjects of intensive research of Karl Alex Müller and have been a source of inspiration, among other things, for his Nobel prize-winning research on high temperature superconductivity. An intriguing outstanding question is whether the occurrence of ferroelectricity and superconductivity in the same material is just a coincidence, or whether a deeper connection exists. In addition there is the empirical question of how these two phenomena interact with each other. Here we show that it is possible to induce superconductivity in a two-dimensional layer at the interface of SrTiO3 and LaAlO3 when we make the SrTiO3 ferroelectric by means of 18O substitution. Our experiments indicate that the ferroelectricity is perfectly compatible with having a superconducting two-dimensional electron system at the interface. This provides a promising avenue for manipulating superconductivity in a non centrosymmetric environment.
影响因子：
41.2
作者：
Meevasana, W.;King, P. D. C.;Shen, Z-X.
通讯作者：
Shen, Z-X.
影响因子：
19.6
作者：
Rischau, Carl Willem;Lin, Xiao;Behnia, Kamran
通讯作者：
Behnia, Kamran