Intense-laser-induced above-threshold ionization of a bound electron into continuum states with low energy is investigated in the context of the strong-field approximation that allows for one act of rescattering of th...Intense-laser-induced above-threshold ionization of a bound electron into continuum states with low energy is investigated in the context of the strong-field approximation that allows for one act of rescattering of the re- visiting electron. The quantum orbits for forward and backward scattering are evaluated and generalized to arbitrary scattering angles. The velocity map of the liberated electron exhibits the well-known low-energy structure as well as other features off the polarization axis.展开更多
钙钛矿氧化物异质界面中二维电子气(two-dimensional electron gas,2DEG)与界面超导性的发现使其成为研究热点之一.近年来,氧化物界面研究取得突破性进展,除了传统的LaAlO_(3)/SrTiO_(3)(LAO/STO)界面,2021年在KTaO_(3)(KTO)界面也发现...钙钛矿氧化物异质界面中二维电子气(two-dimensional electron gas,2DEG)与界面超导性的发现使其成为研究热点之一.近年来,氧化物界面研究取得突破性进展,除了传统的LaAlO_(3)/SrTiO_(3)(LAO/STO)界面,2021年在KTaO_(3)(KTO)界面也发现超导性,其超导转变温度(Tc)较LAO/STO高出一个数量级,约为2 K,引起广泛关注.与STO界面体系相比,KTO氧化物界面显现出高载流子迁移率、强自旋轨道耦合(spin-orbit coupling,SOC)等特点,为理解非常规超导机制和构建新物理特性的研究提供了新途径,使KTO异质界面成为未来电子和自旋电子应用的有力候选者.本文旨在总结近5年KTO界面的最新进展,概述多种氧化物与KTO界面超导的新奇物理现象,并讨论目前研究中尚未解决的问题,为未来研究提供参考.展开更多
文摘Intense-laser-induced above-threshold ionization of a bound electron into continuum states with low energy is investigated in the context of the strong-field approximation that allows for one act of rescattering of the re- visiting electron. The quantum orbits for forward and backward scattering are evaluated and generalized to arbitrary scattering angles. The velocity map of the liberated electron exhibits the well-known low-energy structure as well as other features off the polarization axis.
文摘钙钛矿氧化物异质界面中二维电子气(two-dimensional electron gas,2DEG)与界面超导性的发现使其成为研究热点之一.近年来,氧化物界面研究取得突破性进展,除了传统的LaAlO_(3)/SrTiO_(3)(LAO/STO)界面,2021年在KTaO_(3)(KTO)界面也发现超导性,其超导转变温度(Tc)较LAO/STO高出一个数量级,约为2 K,引起广泛关注.与STO界面体系相比,KTO氧化物界面显现出高载流子迁移率、强自旋轨道耦合(spin-orbit coupling,SOC)等特点,为理解非常规超导机制和构建新物理特性的研究提供了新途径,使KTO异质界面成为未来电子和自旋电子应用的有力候选者.本文旨在总结近5年KTO界面的最新进展,概述多种氧化物与KTO界面超导的新奇物理现象,并讨论目前研究中尚未解决的问题,为未来研究提供参考.
