T
Tonica Valla
Researcher at Brookhaven National Laboratory
Publications - 139
Citations - 6994
Tonica Valla is an academic researcher from Brookhaven National Laboratory. The author has contributed to research in topics: Angle-resolved photoemission spectroscopy & Topological insulator. The author has an hindex of 39, co-authored 131 publications receiving 6124 citations.
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Journal ArticleDOI
Chiral magnetic effect in ZrTe 5
Qiang Li,Dmitri E. Kharzeev,Dmitri E. Kharzeev,Cheng Zhang,Yuan Huang,Ivo Pletikosic,Ivo Pletikosic,Alexei V. Fedorov,Ruidan Zhong,John Schneeloch,G. D. Gu,Tonica Valla +11 more
TL;DR: A magnetotransport study of zirconium pentatelluride, ZrTe5, has been carried out in this paper, which reveals evidence for a chiral magnetic effect, a striking macroscopic manifestation of the quantum and relativistic nature of Weyl semimetals.
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Evidence for Quantum Critical Behavior in the Optimally Doped Cuprate Bi2Sr2CaCu2O8+δ
Tonica Valla,Alexei V. Fedorov,Peter D. Johnson,Barrett Wells,Steven L. Hulbert,Qiang Li,Genda Gu,N. Koshizuka +7 more
TL;DR: In this paper, the photoemission line shapes of the optimally doped cuprate Bi(2)Sr(2),CaCu(2)/O(8+delta) were studied in the direction of a node in the superconducting order parameter by means of very high resolution photo-emission spectroscopy.
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Many-Body Effects in Angle-Resolved Photoemission: Quasiparticle Energy and Lifetime of a Mo(110) Surface State
TL;DR: In this article, Angle-resolved photoemission spectroscopy (ARPES) has been used to measure the energy and lifetime of the photohole in the experiment.
Journal ArticleDOI
Doping and Temperature Dependence of the Mass Enhancement Observed in the Cuprate Bi 2 Sr 2 CaCu 2 O 8 + δ
Peter D. Johnson,Tonica Valla,Alexei V. Fedorov,Z. Yusof,Barrett Wells,Qiang Li,A. R. Moodenbaugh,Genda Gu,N. Koshizuka,Christopher A. Kendziora,Sha Jian,D. G. Hinks +11 more
TL;DR: In this paper, high-resolution photoemission is used to study the electronic structure of the cuprate superconductor as a function of hole doping and temperature, and a kink observed in the band dispersion in the nodal line in the superconducting state is associated with coupling to a resonant mode observed in neutron scattering.
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Imaging Dirac-mass disorder from magnetic dopant atoms in the ferromagnetic topological insulator Crx(Bi0.1Sb0.9)2-xTe3
Inhee Lee,Chung Koo Kim,Jinho Lee,Jinho Lee,Simon J. L. Billinge,Simon J. L. Billinge,Ruidan Zhong,John Schneeloch,John Schneeloch,Tiansheng S. Liu,Tiansheng S. Liu,Tonica Valla,John M. Tranquada,Genda Gu,J. C. Séamus Davis +14 more
TL;DR: Simultaneous visualization of the Dirac-mass gap Δ(r) in a ferromagnetic TI reveals its intense disorder, which is directly related to fluctuations in n(r), the Cr atom areal density in the termination layer and is not inconsistent with predictions for surface ferromagnetism mediated by those states.