Spin and phase coherence lengths inn-InSbquasi-one-dimensional wires

Spin and phase coherence lengths in InAs wires with diffusive boundary scattering

Measurements of low-temperature magnetotransport in lithographic wires of submicron widths fabricated from high-mobility AlGaSb/InAs/AlGaSb two-dimensional electron system heterostructures are presented. The dependence of the spin and phase coherence lengths on wire width and diffusion constant is investigated by analyzing the conductance in low applied magnetic fields with antilocalization mod...

One-dimensional Quantum Wires

In this paper we investigate the properties of a one-dimensional quantum wire of interacting electrons in the Wigner crystal limit. Recent theoretical work has explored some of the classical and quantum phase transitions associated with this system. For example, there exists a critical density above which the system can lower its energy by forming a quasi-one-dimensional zig-zag chain. We also ...

Spin-orbit interaction and phase coherence in lithographically defined bismuth wires

We present low-temperature magnetoresistance measurements on lithographically defined bismuth wires. The phase-coherence time and the spin-orbit scattering time are obtained by analysis of weak antilocalization, with values for the phase-coherence time supported by analysis of the universal conductance fluctuations present in the wires. We find that the phase-coherence time is dominated by elec...

Quantum Phase Transitions in an Integrable One-Dimensional Spin Model

A one-dimensional spin model, recently introduced and solved exactly, is studied. The solution, showing the appearance of a first-order quantum phase transition, is explicitly carried out and verified. Moreover, new results are found by generalizing the model to include anisotropy, thereby giving additional phases with both first-order and continuous quantum phase transitions. These transitions...

Universal spin-polarization fluctuations in one-dimensional wires with magnetic impurities