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Global Phase Diagram of the High Tc Cuprates
Han-Dong Chen, Sylvain Capponi, Fabien Alet +1
The high Tc cuprates have a complex phase diagram with many competing phases. We propose a bosonic effective quantum Hamiltonian based on the projected SO(5) model with extended in…
Dynamic generation of spin orbit coupling
Congjun Wu, Shou-Cheng Zhang
Spin-orbit coupling plays an important role in determining the properties of solids, and is crucial for spintronics device applications. Conventional spin-orbit coupling arises mic…
Dissipationless Spin Current in Anisotropic p-Doped Semiconductors
Bogdan A. Bernevig, JiangPing Hu, Eran Mukamel +1
Recently, dissipationless spin current has been predicted for the p-doped semiconductors with spin-orbit coupling. Here we investigate the effect of spherical symmetry breaking on…
Quantitative Test of SO(5) Symmetry in the Vortex State of
Han-Dong Chen, Congjun Wu, Shou-Cheng Zhang
By numerically solving models with competing superconducting and antiferromagnetic orders, we study the magnetic field dependence of the antiferromagnetic moment in both the weak a…
Non-abelian Berry's phase and Chern numbers in higher spin pairing condensates
Chyh-Hong Chern, Han-Dong Chen, Congjun Wu +2
We show that the non-Abelian Berry phase emerges naturally in the s-wave and spin quintet pairing channel of spin-3/2 fermions. The topological structure of this pairing condensate…
SU(2) Non-Abelian Holonomy and Dissipationless Spin Current in Semiconductors
Shuichi Murakami, Naoto Nagaosa, Shou-Cheng Zhang
Following our previous work [S. Murakami, N. Nagaosa, S. C. Zhang, Science 301, 1348 (2003)] on the dissipationless quantum spin current, we present an exact quantum mechanical cal…
Reply to the comment cond-mat/0308067
H. J. Kang, Pengcheng Dai, J. W. Lynn +6
Mang et al. report the observation of a cubic (Nd,Ce)2O3 impurity phase grown epitaxially in annealed samples of electron-doped Nd2-xCexCuO4 (NCCO) and argue that our observed magn…
Dissipationless Quantum Spin Current at Room Temperature
Shuichi Murakami, Naoto Nagaosa, Shou-Cheng Zhang
While microscopic laws of physics are invariant under the reversal of the arrow of time, the transport of energy and information in most devices is an irreversible process. It is t…
The Eight Dimensional Quantum Hall Effect and the Octonions
B. A. Bernevig, J. P. Hu, N. Toumbas +1
We construct a generalization of the quantum Hall effect where particles move in an eight dimensional space under an SO(8) gauge field. The underlying mathematics of this particle…
Exact SO(5) Symmetry in spin 3/2 fermionic system
Congjun Wu, Jiang-ping Hu, Shou-cheng Zhang
The spin 3/2 fermion models with contact interactions have a {\it generic} SO(5) symmetry without any fine-tuning of parameters. Its physical consequences are discussed in both the…