Bulk-sensitive Imaging of Twin Domains in La$_{2-x}$Sr$_x$CuO$_4$ under Uniaxial Pressure

中子散射研究 La$_{1.885}$Ba$_{0.115}$CuO$_4$ 中单轴应力下磁条纹的演化

Evolution of magnetic stripes under uniaxial stress in La$_{1.885}$Ba$_{0.115}$CuO$_4$ studied by neutron scattering

利用中子散射研究 La$_{1.885}$Ba$_{0.115}$CuO$_4$，发现单轴应力抑制静态磁条纹并使涨落动量移向 1/8 公度值，揭示超导与静态磁性的权衡。

对比 c 轴与面内单轴应力对 La$_{1.885}$Ba$_{0.115}$CuO$_4$ 超导电性和条纹序的影响

Contrasting $c$-axis and in-plane uniaxial stress effects on superconductivity and stripe order in La$_{1.885}$Ba$_{0.115}$CuO$_4$

本文通过 μSR 和交流磁化率测量对比研究了 LBCO-0.115 在 c 轴压缩与面内单轴应力下的响应，发现 c 轴应力抑制超导转变温度但对条纹序无影响，揭示了应力响应的强各向异性。

Mechanical behavior of InP twinning superlattice nanowires

Taper-free InP twinning superlattice (TSL) nanowires with an average twin spacing of ~ 13 nm were grown along the zinc-blende close-packed [111] direction using metalorganic vapor phase epitaxy. The mechanical properties and fracture mechanisms of individual InP TSL nanowires in tension were ascertained by means of in situ uniaxial tensile tests in a transmission electron microscope. The elastic modulus, failure strain and tensile strength along the [111] direction were determined. No evidence of inelastic deformation mechanisms was found before fracture, which took place in a brittle manner a…

单轴应变驱动的LaAlO3铁电弹性域控制

Uniaxial strain-driven ferroelastic domain control in LaAlO3

通过单轴应变调控LaAlO3单晶的铁电弹性域结构，实现可控的域分布变化，为异质结构中的主动实时编程提供新方法。

拉应力下铜的晶界扩散

Grain Boundary Diffusion in Copper under Tensile Stress

采用分子动力学模拟研究了铜在$Σ$ 3孪晶界上的应力增强自扩散。单轴拉伸应力的存在下的结果在一个显着减少的激活能为5 eV的幅度每单位应变的晶界自扩散。使用点缺陷形成和扩散的理论模型，单轴拉伸应变$ε$上的有效激活能$Q$的功能依赖性示出由$Q(ε)=Q_0-E_0V^*ε$描述，其中$E_0$是零温杨氏模量和$V^*$是有效激活体积。模拟数据与该模型吻合良好，数据与模型之间的比较表明，$V^*=0.6Ω$，其中$Ω$是原子体积。$V^*/Ω=0.6$与空位主导的扩散机制一致。