Weak antilocalization in quantum wells in tilted magnetic fields
2004 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 70, no 15Article in journal (Refereed) Published
Weak antilocalization is studied in an InxGa1-xAs quantum well. Anomalous magnetoresistance is measured and described theoretically in fields perpendicular, tilted, and parallel to the quantum well plane. Spin and phase-relaxation times are found as functions of temperature and parallel field. It is demonstrated that spin dephasing is due to the Dresselhaus spin-orbit interaction. The values of electron spin-splittings and spin-relaxation times are found in the wide range of two-dimensional density. Application of in-plane field is shown to destroy weak antilocalization due to competition of Zeeman and microroughness effects. Their relative contributions are separated, and the values of the in-plane electron g factor and characteristic size of interface imperfections are found.
Place, publisher, year, edition, pages
American Physical Society , 2004. Vol. 70, no 15
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-59211DOI: 10.1103/PhysRevB.70.155323ISI: 000224855900065OAI: oai:DiVA.org:liu-59211DiVA: diva2:350113