title: Parity effect of bipolar quantum Hall edge transport around graphene antidots.
abstract: Parity effect, which means that even-odd property of an integer physical parameter results in an essential difference, ubiquitously appears and enables us to grasp its physical essence as the microscopic mechanism is less significant in coarse graining. Here we report a new parity effect of quantum Hall edge transport in graphene antidot devices with pn junctions (PNJs). We found and experimentally verified that the bipolar quantum Hall edge transport is drastically affected by the parity of the number of PNJs. This parity effect is universal in bipolar quantum Hall edge transport of not only graphene but also massless Dirac electron systems. These results offer a promising way to design electron interferometers in graphene.
authors.affiliation: 1] Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan [2] Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Sadashige
authors.initials: S
authors.lastname: Matsuo
authors.affiliation: NIMS, WPI-MANA, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Shu
authors.initials: S
authors.lastname: Nakaharai
authors.affiliation: NIMS, WPI-MANA, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Komatsu
authors.affiliation: NIMS, WPI-MANA, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Tsukagoshi
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: Takahiro
authors.initials: T
authors.lastname: Moriyama
authors.affiliation: Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
authors.forename: Teruo
authors.initials: T
authors.lastname: Ono
authors.affiliation: Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan.
authors.forename: Kensuke
authors.initials: K
authors.lastname: Kobayashi