Effect of temperature and magnetic field on the 0.7 structure in a ballistic one-dimensional wire

✍ Scribed by K.J. Thomas; J.T. Nicholls; M. Pepper; M.Y. Simmons; D.R. Mace; D.A. Ritchie

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 83 KB
• Volume: 12
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(01)00385-x

✦ Synopsis

Low temperature measurements of ballistic one-dimensional (1D) wires show an additional structure at 0:7(2e 2 =h) in the conductance characteristics (Phys. Rev. Lett. 77 (1996) 135; Phys. Rev. B 62 (2000) 10 950). This 0.7 structure develops into a plateau at e 2 =h, if, either the in-plane magnetic ÿeld is increased (Phys. Rev. Lett. 77 (1996) 135) or the carrier density is decreased (Phys. Rev. B 61 (2000) 13 365). A suggested explanation for this e ect is based on spin polarisation induced by many-body interactions. As temperature increases, the e 2 =h plateau in a magnetic ÿeld shifts to 0:6(2e 2 =h), whereas other plateaus remain unchanged. We study the e ect of temperature on the evolution of the 0.7 structure with increasing in-plane magnetic ÿeld.