CHI-TE LIANGSimmons, M.Y.M.Y.SimmonsSmith, C.G.C.G.SmithKim, G.H.G.H.KimRitchie, D.A.D.A.RitchiePepper, M.M.Pepper2018-09-102018-09-10199910980121http://www.scopus.com/inward/record.url?eid=2-s2.0-0001639004&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/348934A shoulderlike feature close to (Formula presented) “the 0.7 structure” at zero magnetic field was observed in clean one-dimensional (1D) channels [K.J. Thomas et al., Phys. Rev. Lett. 77, 135 (1996)]. To provide further understanding of this structure, we have performed low-temperature measurements of a 1D channel with overlaying finger gates to study the 0.7 structure as a function of lateral confinement strength and potential profile. We found that the structure persists when the lateral confinement strength is changed by a factor of 2. We have also shown that the 0.7 structure present in two 1D channels in series behaves like a single 1D channel that shows the 0.7 structure, demonstrating that the 0.7 structure is not a transmission effect through a ballistic channel at zero in-plane magnetic field. © 1999 The American Physical Society.journal article10.1103/PhysRevB.60.106872-s2.0-0001639004WOS:000083427600033