Electrically controllable RKKY interaction in semiconductor quantum wires

We demonstrate in theory that it is possible to all-electrically manipulate the RKKY interaction in a quasi-one-dimensional electron gas embedded in a semiconductor heterostructure, in the presence of Rashba and Dresselhaus spin-orbit interaction. In an undoped semiconductor quantum wire where intermediate excitations are gapped, the interaction becomes the short-ranged Bloembergen-Rowland superexchange interaction. Owing to the interplay of different types of spin-orbit interaction, the interaction can be controlled to realize various spin models, e.g., isotropic and anisotropic Heisenberg-like models, Ising-like models with additional Dzyaloshinsky-Moriya terms, by tuning the external electric field and designing the crystallographic directions. Such controllable interaction forms a basis for quantum computing with localized spins and quantum matters in spin lattices.

Submitted by 阎军 (yanj@red.semi.ac.cn) on 2010-04-28T13:28:19Z No. of bitstreams: 1 Electrically controllable RKKY interaction in semiconductor quantum wires.pdf: 222456 bytes, checksum: 723b18c7c5384cdde88e084be7af8e21 (MD5)

Approved for entry into archive by 阎军(yanj@red.semi.ac.cn) on 2010-04-28T13:49:47Z (GMT) No. of bitstreams: 1 Electrically controllable RKKY interaction in semiconductor quantum wires.pdf: 222456 bytes, checksum: 723b18c7c5384cdde88e084be7af8e21 (MD5)

Made available in DSpace on 2010-04-28T13:49:47Z (GMT). No. of bitstreams: 1 Electrically controllable RKKY interaction in semiconductor quantum wires.pdf: 222456 bytes, checksum: 723b18c7c5384cdde88e084be7af8e21 (MD5) Previous issue date: 2010

NSFC 60525405 10874175 HK RGC CUHK/401906 HKU 10/CRF/08 CN Yang visiting program

其它

NSFC 60525405 10874175 HK RGC CUHK/401906 HKU 10/CRF/08 CN Yang visiting program