量子淬火后正交顺磁体的电特性和弹性特性

Pub Date : 2024-04-01 DOI:10.1063/10.0025296
A. A. Zvyagin, G. A. Zvyagina
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引用次数: 0

摘要

正方体和单斜体准磁体中磁场的量子淬火(突然变化)会导致系统自旋四极矩的重正化。在封闭系统中,重归一化的自旋四极矩随频率振荡,频率由磁场的最终值决定。在开放系统中,这些振荡在稳定状态下会受到抑制。系统的电介电常数、压电模量和弹性模量的重正化取决于磁场的初始值和有限值,通过自旋四极磁感应强度显示出磁场临界值的特征。
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Electric and elastic characteristics of the orthorhombic paramagnet after the quantum quench
Quantum quench (the sudden change) of the magnetic field in the orthorhombic and monoclinic paramagnets yields the renormalization of the spin quadrupole moment of the system. In the closed system, the renormalized spin quadrupole moment oscillates with the frequency, determined by the final value of the magnetic field. In the open system, these oscillations are damped in the steady-state regime. The renormalization of the electric permittivity, piezoelectric modulus, and elastic modulus of the system are dependent on both initial and finite values of the magnetic field via the spin quadrupole susceptibility demonstrating features at the critical values of the magnetic field, at which crossover of the energy levels of the paramagnet takes place.
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