Semiclassical study of single-molecule magnets and their quantum phase transitions

被引：2

作者：

Lohr-Robles, D. S. ^{[1
]}

Lopez-Moreno, E. ^{[2
]}

Hess, P. O. ^{[1
,3
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, Mexico

[2] Univ Nacl Autonoma Mexico, Fac Ciencias, Mexico City 04510, Mexico

[3] J W Von Goethe Univ, Frankfurt Inst Adv Studies, Hessen, Germany

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2023年 / 56卷 / 50期

关键词：

quantum phase transitions; algebraic models; semiclassical approximation; HEAT-CAPACITY ANOMALIES; INTERACTING BOSON MODEL; MAGNETIZATION; RELAXATION; ANISOTROPY; BEHAVIOR; INTERFERENCE; SPECTROSCOPY; MONOLAYER; COHERENCE;

D O I：

10.1088/1751-8121/ad0d1f

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a study on systems of single-molecule magnet systems using semiclassical analysis and catastrophe theory. Separatrices in the parameter space are constructed, which are useful for determining the structure of the Hamiltonian energy levels. In particular the Maxwell set separatrix determines the behaviour of the ground state of the system. We consider an external magnetic field with two components: one parallel to the easy magnetisation axis of the molecule and the other perpendicular to it. Using fidelity and heat capacity we were able to detect the signals of the quantum phase transitions as a function of the magnetic field components.

引用

页数：19

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