10 papers
Aharonov-Casher phase and persistent current in a polyacetylene ring
Zhijian Li, J. Q. Liang, F. -C. Pu
We investigate a polyacetylene ring in an axially symmetric, static electric field with a modified SSH Hamiltonian of a polyacetylene chain. An effective gauge potential of the sin…
Tunnel splitting and quantum phase interference in biaxial ferrimagnetic particles at excited states
Yi-Hang Nie, Yan-Hong Jin, J. -Q Liang +1
The tunneling splitting in biaxial ferrimagnetic particles at excited states with an explicit calculation of the prefactor of exponent is obtained in terms of periodic instantons w…
Macroscopic Quantum Phase Interference in Antiferromagnetic Particles
Yi-Hang Nie, Yan-Hong Jin, J. -Q. Liang +3
The tunnel splitting in biaxial antiferromagnetic particles is studied with a magnetic field applied along the hard anisotropy axis. We observe the oscillation of tunnel splitting…
Quantum Phase Interference for Quantum Tunneling in Spin Systems
J. -Q. Liang, H. J. W. Müller-Kirsten, D. K. Park +1
The point-particle-like Hamiltonian of a biaxial spin particle with external magnetic field along the hard axis is obtained in terms of the potential field description of spin syst…
Macroscopic Quantum Coherence in Small Antiferromagnetic Particle and the Quantum Interference Effects
Y. -H. Nie, Y. -B. Zhang, J. -Q. Liang +2
Starting from the Hamiltonian operator of the noncompensated two-sublattice model of a small antiferromagnetic particle, we derive the effective Lagrangian of a biaxial antiferroma…
Macroscopic quantum coherence in mesoscopic ferromagnetic systems
S. P. Kou, J. Q. Liang, Y. B. Zhang +1
In this paper we study the Macroscopic Quantum Oscillation (MQO) effect in ferromagnetic single domain magnets with a magnetic field applied along the hard anistropy axis. The leve…