Electronic states and persistent currents in nanowire quantum ring

Abstract

The new model of a quantum ring (QR) defined inside a nanowire (NW) is proposed. The one-particle Hamiltonian for electron in [111]-oriented NW QR is constructed taking into account both Rashba and Dresselhaus spin-orbit coupling (SOC). The energy levels as a function of magnetic field are found using the exact numerical diagonalization. The persistent currents (both charge and spin) are calculated. The specificity of SOC and arising anticrossings in energy spectrum lead to unusual features in persistent current behavior. The variation of magnetic field or carrier concentration by means of gate can lead to pure spin persistent current with the charge current being zero.

3 pages, 2 figures

References in corpus (5)

• Persistent current in ballistic mesoscopic rings with Rashba spin-orbit coupling
• Spin states and persistent currents in mesoscopic rings: spin-orbit interactions
• Spin-orbit interaction and anomalous spin relaxation in carbon nanotube quantum dots
• Effect of spin-orbit coupling on spectral and transport properties of tubular electron gas in InAs nanowires
• Determination of Rashba-coupling strength for surface two-dimensional electron gas in InAs nanowires

Cited by in corpus (2)

• Persistent spin textures and currents in wurtzite nanowire-based quantum structures
• On derivation of Dresselhaus spin-splitting Hamiltonians in one-dimensional electron systems