Kinetic pathway facilitated by a phase competition to achieve a metastable electronic phase
Kinetic pathway facilitated by a phase competition to achieve a metastable electronic phase
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DOI：
10.1103/physrevb.103.l041106
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发表时间：
2021-01-14
影响因子：
3.7
通讯作者：
Kagawa, Fumitaka
中科院分区：
文献类型：
--
作者：
Matsuura, Keisuke;Oike, Hiroshi;Kagawa, Fumitaka
我们发现，基态相竞争显著降低了动力学避免一级相变所需的临界冷却速率，从而促进了亚稳态电子态的产生。这一原理揭示了所谓的巨磁电阻锰氧化物Nd0.5Sr0.5MnO_3中反铁磁电荷-轨道有序绝缘态和铁磁金属态之间的相变。在位相竞争的情况下，我们实现了对体磁化的可逆和非挥发控制，磁化强度为1mU(B)/F.U。通过施加电脉冲来利用电加热和随后的快速冷却，电阻率降低了类似于1000%。
We show that ground state phase competition significantly decreases the critical cooling rate required for the kinetic avoidance of a first-order phase transition and thus facilitates the creation of metastable electronic states. This principle is revealed for the phase transition between antiferromagnetic charge-orbital-ordered insulating and ferromagnetic metallic states in the so-called colossal magnetoresistive manganite Nd0.5Sr0.5MnO3. In a phase competition situation, we achieve reversible and nonvolatile control of bulk magnetization by 1 mu(B)/f.u. and resistivity by similar to 1000% by applying electric pulses to exploit electric heating and subsequent rapid cooling.