Uniaxial Strain and Hydrostatic Pressure Engineering of the Hidden Magnetism in La_1–xCa_xMnO₃ (0 ≤ x ≤ 1/2) Thin Films

Abstract

Here, using various substrates, we demonstrate that the in-plane uniaxial strain engineering can enhance the Jahn–Teller distortions and promote selective orbital occupancy to induce an emergent antiferromagnetic insulating (AFI) phase at x = 1/3 of La1–x Ca x MnO3. Such an AFI phase depends not only on the magnitude of epitaxial strain but also on the symmetry of the substrates. Using the large uniaxial strain imparted by DyScO3(001) substrate, the AFI ground state is achieved in a wide range of doping levels (0 ≤ x ≤ 1/2), leaving an extended AFI phase diagram. Moreover, it is found that hydrostatic pressure can tune the AFI phase back to a hidden ferromagnetic metallic phase, accompanied by the formation of accommodation strain. The coaction of the accommodation strain, uniaxial strain, and hydrostatic pressure produces complex phase competition and evolution, and the result may shed light on phase space control of other functional perovskites with the competing magnetic interactions.

Highly efficient and fast modulation of magnetic coupling interaction in the SrCoO2.5/La0.7Ca0.3MnO3 heterostructure

“…Remarkably, the initial B-SCO/LCMO bilayer displays the metal-insulator transition near 150 K (black line in Fig. 3(a)), 26,27 which corresponds to T C of the single LCMO layer, as shown in Fig. S5(b) (see ESI †).…”

In-gap states and strain-tuned band convergence in layered structure trivalent iridate K0.75Na0.25IrO2

“…65,66 Not to mention that the uniaxially strained films have been extensively realized by modern experimental technology, such as a 10 nm-thick BiFeO 3 film being uniaxially strained by a (110)-oriented LaAlO 3 substrate, 67 the large uniaxial strain imparted by the DyScO 3 (001) substrate to La 1Àx CaxMnO 3 (0 r x r 1/2) thin films. 68 Therefore, it is technically feasible to realize the uniaxial strain and manipulate the electronic structure of K 0.75 Na 0.25 IrO 2 .…”

Dynamical control of nanoscale light-matter interactions in low-dimensional quantum materials

“…Strain engineering has emerged as a versatile method to modify the physical properties of materials, expanding their potential applications in various nanooptoelectronic devices [98][99][100] . Although several techniques, such as thermal annealing 101,102 , hydrostatic pressurization [103][104][105][106] , mechanical bending [107][108][109][110][111][112] , and electrostriction 113 , have been utilized to induce physical strain, controlling strain at the nanoscale space and exploring optical properties with nanoscale spatial resolution remain challenges.…”