Magneto-transport in high g-factor, low-density two-dimensional electron systems confined in In_0.75Ga_0.25As/In_0.75Al_0.25As quantum wells

Abstract

We report magneto-transport measurements on high-mobility two-dimensional electron systems (2DESs) confined in In_0.75Ga_0.25As/In_0.75Al_0.25As single quantum wells. Several quantum Hall states are observed in a wide range of temperatures and electron densities, the latter controlled by a gate voltage down to values of 1.10^11 cm^-2. A tilted-field configuration is used to induce Landau level crossings and magnetic transitions between quantum Hall states with different spin polarizations. A large filling factor dependent effective electronic g-factor is determined by the coincidence method and cyclotron resonance measurements. From these measurements the change in exchange-correlation energy at the magnetic transition is deduced. These results demonstrate the impact of many-body effects in tilted-field magneto-transport of high-mobility 2DESs confined in In_0.75Ga_0.25As/In_0.75Al_0.25As quantum wells. The large tunability of electron density and effective g-factor, in addition, make this material system a promising candidate for the observation of a large variety of spin-related phenomena.

7 pages, 5 figures

References in corpus (9)

• Universal Intrinsic Spin-Hall Effect
• Resistance Spikes at Transitions between Quantum Hall Ferromagnets
• Resistance spikes and domain wall loops in Ising quantum Hall ferromagnets
• Magnetotransport in a two-dimensional electron gas in the presence of spin-orbit interaction
• Critical Collapse of the Exchange Enhanced Spin Splitting in 2-D Systems
• Ising Quantum Hall Ferromagnet in Magnetically Doped Quantum Wells
• InAs-AlSb quantum wells in tilted magnetic fields
• Two-dimensional electron gas formation in undoped In[0.75]Ga[0.25]As/In[0.75]Al[0.25]As quantum wells
• Metastable phase in the quantum Hall ferromagnet

Cited by in corpus (15)

• Anti-crossings of spin-split Landau levels in an InAs two-dimensional electron gas with spin-orbit coupling
• Effective g-factors of carriers in inverted InAs/GaSb bilayers
• Proximity effect in a two dimensional electron gas probed with a lateral quantum dot
• In_(0.75)Ga_(0.25)As on GaAs submicron rings and their application for coherent nanoelectronic devices
• Proposal for a Datta-Das transistor in the quantum Hall regime
• A ballistic two-dimensional-electron-gas Andreev interferometer
• Quantum dot spectroscopy of proximity-induced superconductivity in a two-dimensional electron gas
• Anomalous magnetoresistance peak in (110) GaAs two-dimensional holes: Evidence for Landau-level spin-index anticrossings
• Energy spectrum reconstruction at the edge of a two-dimensional electron system with strong spin-orbit coupling
• Phase Diagram of Quantum Hall Breakdown and Non-linear Phenomena for InGaAs/InP Quantum Wells
• Electron-phonon coupling in the two phonon mode ternary alloy $A{l}_{0.25}I{n}_{0.75}As/G{a}_{0.25}I{n}_{0.75}As$ quantum well
• Andreev reflection at the edge of a two-dimensional electron system with strong spin-orbit coupling
• Singlet-triplet transition in a few-electron lateral InGaAs-InAlAs quantum dot
• Gating of two-dimensional electron systems in InGaAs/InAlAs heterostructures: the role of the intrinsic InAlAs deep donor defects
• Revisiting Coulomb diamond signatures in quantum Hall interferometers