title: Real space imaging of spin polarons in Zn-doped SrCu(2)(BO(3))(2).
abstract: We report on the real space profile of spin polarons in the quasi-two-dimensional frustrated dimer spin system SrCu(2)(BO(3))(2) doped with 0.16% of Zn. The (11)B nuclear magnetic resonance spectrum exhibits 15 additional boron sites near nonmagnetic Zn impurities. With the help of exact diagonalizations of finite clusters, we have deduced from the boron spectrum, the distribution of local magnetizations at the Cu sites with fine spatial resolution, providing direct evidence for an extended spin polaron. The results are confronted with those of other experiments performed on doped and undoped samples of SrCu(2)(BO(3))(2).
authors.affiliation: Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Yoshida
authors.affiliation: Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kobayashi
authors.affiliation: Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: I
authors.initials: I
authors.lastname: Yamauchi
authors.affiliation: Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Takigawa
authors.affiliation: Laboratoire de Physique Théorique, Université de Toulouse and CNRS, UPS (IRSAMC), F-31062 Toulouse, France.
authors.forename: S
authors.initials: S
authors.lastname: Capponi
authors.affiliation: Laboratoire de Physique Théorique, Université de Toulouse and CNRS, UPS (IRSAMC), F-31062 Toulouse, France.
authors.forename: D
authors.initials: D
authors.lastname: Poilblanc
authors.affiliation: Institut de Théorie des Phénomènes Physiques, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
authors.forename: F
authors.initials: F
authors.lastname: Mila
authors.affiliation: Department of Physics, Okayama University, Okayama 700-8530, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Kudo
authors.affiliation: Department of Applied Physics, Tohoku University, Sendai 980-8579, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Koike
authors.affiliation: Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Kobayashi