Publications


2019


Visualizing 1D Zigzag Wigner Crystallization at Domain Walls in the Mott Insulator TaS2
Anuva Aishwarya, Sean Howard, Bikash Padhi, Lihai Wang, Sang-Wook Cheong, Philip W. Phillips, Vidya Madhavan
arXiv:1906.11983

Signature of Dispersing 1D Majorana Channels in an Iron-based superconductors
Zhenyu Wang, Jorge Olivares Rodriguez, Martin Graham, G. D. Gu, Taylor Hughes, Dirk K. Morr, Vidya Madhavan
arXiv:1903.00515

Doping induced Mott collapse and the density wave instability in (Sr1-x Lax)3Ir2O7
Zhenyu Wang, Daniel Walkup, Yulia Maximenko, Wenwen Zhou, Tom Hogan, Ziqiang Wang, Stephen D. Wilson, Vidya Madhavan
arXiv:1905.06469
To be published npj Quantum Materials (2019)

Topological nature of step edge states on the surface of topological crystalline insulator Pb0.7Sn0.3Se
Davide Iaia, Chang-Yan Wang, Yulia Maximenko, Daniel Walkup, R. Sankar, Fangcheng Chou, Yuan-Ming Lu, Vidya Madhavan
Phys. Rev. B 99, 155116 (2019)


2018


Disorder induced power-law gaps in an Insulator-Metal Mott transition
Zhenyu Wang, Yoshinori Okada, Jared O’ Neal, Wenwen Zhou, Daniel Walkup, Chetan Dhital, Tom Hogan, Patrick Clancy, Young-June Kim, Y. F. Hu, Luiz Santos, Stephen D. Wilson, Nandini Trivedi, Vidya Madhavan
PNAS 115, (44) 11198-11202 (2018)

Unique Gap Structure and Symmetry of the Charge Density Wave in Single-Layer VSe2
P. Chen, Woei Wu Pai, Y.-H. Chan, V. Madhavan, M. Y. Chou, S.-K. Mo, A.-V. Fedorov, and T.-C. Chiang
Phys. Rev. Lett. 121, 196402 (2018)

Searching for topological Fermi arcs via quasiparticle interference on a type-II Weyl semimetal MoTe2
Davide Iaia, Guoqing Chang, Tay-Rong Chang, Jin Hu, Zhiqiang Mao, Hsin Lin, Shichao Yan, Vidya Madhavan
npj Quantum Materials, 3, 38 (2018)

Interplay of orbital effects and nanoscale strain in topological crystalline insulators
Daniel Walkup, Badih Assaf, Kane L Scipioni, R. Sankar, Fangcheng Chou, Guoqing Chang, Hsin Lin, Ilija Zeljkovic, Vidya Madhavan
Nature Communications  9, 1550 (2018)

Defect Role in the Carrier Tunable Topological Insulator (Bi1−xSbx)2Te3 Thin Films
Kane L. Scipioni, Zhenyu Wang, Yulia Maximenko, Ferhat Katmis, Charlie Steiner, and Vidya Madhavan
Phys. Rev. B, 97, 125150 (2018)


2017


Quasiparticle Interference and Strong Electron-Mode Coupling in the Quasi-One-Dimensional Bands of Sr2RuO4
Zhenyu Wang, Daniel Walkup, Philip Derry, Thomas Scaffidi, Melinda Rak, Sean Vig, Anshul Kogar, Ilija Zeljkovic, Ali Husain, Luiz H. Santos, Yuxuan Wang, Andrea Damascelli, Yoshiteru Maeno, Peter Abbamonte, Eduardo Fradkin, Vidya Madhavan
Nature Physics DOI:10.1038/NPHYS4107 (2017)

Influence of domain walls in the incommensurate charge density wave state of Cu intercalated 1T-TiSe2
Shichao Yan, Davide Iaia, Emilia Morosan, Eduardo Fradkin, Peter Abbamonte, Vidya Madhavan
Phys. Rev. Lett. 118, 106405 (2017)


2015


The influence of electron-doping on the ground state of (Sr1-xLax)2IrO4
Xiang Chen, Tom Hogan, D. Walkup, Wenwen Zhou, M. Pokharel, Mengliang Yao, Wei Tian, Thomas Z. Ward, Y. Zhao, D. Parshall, C. Opeil, J. W. Lynn, Vidya Madhavan, Stephen D. Wilson
Phys. Rev. B 92, 075125 (2015)

First-order melting of a weak spin-orbit Mott insulator into a correlated metal
Tom Hogan, Z. Yamani, D. Walkup, Xiang Chen, Rebecca Dally, Thomas Z. Ward, John Hill, Z. Islam, Vidya Madhavan, Stephen D. Wilson
Physical Review Letters 114, 257203 (2015)

Nanoscale Determination of the Mass Enhancement Factor in the Lightly-Doped Bulk Insulator Lead Selenide
Ilija Zeljkovic, Kane L Scipioni, Daniel Walkup, Yoshinori Okada, Wenwen Zhou, Raman Sankar, Guoqing Chang, Yung Jui Wang, Hsin Lin, Arun Bansil, Fangcheng Chou, Ziqiang Wang, Vidya Madhavan
Nature Commun. 6, 6559 (2015)

Strain engineering Dirac surface states in heteroepitaxial topological crystalline insulator thin films Ilija Zeljkovic, Daniel Walkup, Badih Assaf, Kane L Scipioni, R. Sankar, Fangcheng Chou, Vidya Madhavan
Nature Nanotechnology 10, 849 (2015)

Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators
Ilija Zeljkovic, Yoshinori Okada, Maksym Serbyn, R. Sankar, Daniel Walkup, Wenwen Zhou, Junwei Liu, Guoqing Chang, Yung Jui Wang, M. Zahid Hasan, Fangcheng Chou, Hsin Lin, Arun Bansil, Liang Fu, Vidya Madhavan
Nature Materials 14, 318 (2015)

Large single crystal growth, transport property, and spectroscopic characterizations of three-dimensional Dirac semimetal Cd3As2
R. Sankar, M. Neupane, S.-Y. Xu, C. J. Butler, I. Zeljkovic, I. Panneer Muthuselvam, F.T. Huang, S.T. Guo, Sunil K. Karna, M.W. Chu, W. L. Lee, M.T. Lin, R. Jayavel, V. Madhavan, M. Z. Hasan, F. C. Chou
Scientific Reports 5 (2015)


2014


Mapping the unconventional orbital texture in topological crystalline insulators
Ilija Zeljkovic, Yoshinori Okada, Cheng-Yi Huang, R. Sankar, Daniel Walkup, Wenwen Zhou, Maksym Serbyn, Fangcheng Chou, Wei-Feng Tsai, Hsin Lin, Arun Bansil, Liang Fu, M. Zahid Hasan, Vidya Madhavan
Nature Physics 10, 572-577 (2014)

Carrier localization and electronic phase separation in a doped spin-orbit driven Mott phase in Sr3(Ir1-xRux)2O7
Chetan Dhital, Tom Hogan, Wenwen Zhou, Xiang Chen, Zhensong Ren, Mani Pokharel, Yoshinori Okada, M. Heine, Wei Tian, Z. Yamani, C. Opeil, J. S. Helton, J. W. Lynn, Ziqiang Wang, Vidya Madhavan, Stephen D. Wilson Nature Communications 5, 3377 (2014)


2013


Observation of Dirac node formation and mass acquisition in a topological crystalline insulator
Yoshinori Okada, Maksym Serbyn, Hsin Lin, Daniel Walkup, Wenwen Zhou, Chetan Dhital, Madhab Neupane, Suyang Xu, Yung Jui Wang, R. Sankar, Fangcheng Chou, Arun Bansil, M. Zahid Hasan, Stephen D. Wilson, Liang Fu, Vidya Madhavan
Science 341, 6153 (2013)

Imaging the evolution of metallic states in a spin-orbit interaction driven correlated iridate
Yoshinori Okada, Daniel Walkup, Hsin Lin, Chetan Dhital, Tay-Rong Chang, Sovit Khadka, Wenwen Zhou, Horng-Tay Jeng, Arun Bansil, Ziqiang Wang, Stephen Wilson, Vidya Madhavan
Nature Materials 12, 707 (2013)

Topological insulators: Plasmons at the surface
Yoshinori Okada & Vidya Madhavan
Nature Nanotechnology 8, 541-542 (2013)

Topological Dangling Bonds with Large Spin Splitting and Enhanced Spin Polarization on the Surfaces of Bi2Se3 Hsin Lin, Tanmoy Das, Yoshinori Okada, Mike C. Boyer, W. Doug Wise, Michelle Tomasik, Bo Zhen, Eric W. Hudson, Wenwen Zhou, Vidya Madhavan, Chung-Yuan Ren, Hiroshi Ikuta, and Arun Bansil
Nano Lett. 13, 1915-1919 (2013)


2012


Imaging physical phenomena with local probes - from electrons to photons, spanning continuum to quantum interactions
Dawn A. Bonnell, D. N. Basov, Matthias Bode, Ulrike Diebold, Sergei V. Kalinin, Vidya Madhavan, Miquel Salmeron, Udo D. Schwarz, Paul S. Weiss Rev. Mod. Phys. 84, 1343 (2012)

Combining Scanning Tunneling Microscopy and Synchrotron Radiation for High-Resolution Imaging and Spectroscopy with Chemical, Electronic, and Magnetic Contrast
M.L. Cummings, T.Y. Chien, C. Preissner, V. Madhavan, D. Diesing, M. Bode, J.W. Freeland, V. Rose
Ultramicroscopy 112, 22 (2012)

Ripple modulated electronic structure of a 3D topological insulator
Yoshinori Okada, Wenwen Zhou, D. Walkup, Chetan Dhital, S. D. Wilson, V. Madhavan
Nature Communications 3, 1158 (2012)

Visualizing Landau levels of Dirac electrons in a one dimensional potential Yoshinori Okada, Wenwen Zhou, Chetan. Dhital, D. Walkup, Ying Ran, Z. Wang, Stephen D. Wilson, V. Madhavan
Phys. Rev. Lett. 109, 166407 (2012)


2011


Electron-Spin Excitation Coupling in an Electron Doped Copper Oxide Superconductor
Jun Zhao, F. C. Niestemski, Shankar Kunwar, Shiliang Li, P. Steffens, A. Hiess, H. J. Kang, Stephen D. Wilson, Ziqiang Wang, Pengcheng Dai, V. Madhavan
Nature Physics 7, 719-724 (2011)

Direct Observation of Broken Time-Reversal Symmetry on the Surface of a Magnetically Doped Topological Insulator
Y. Okada, C. Dhital, Wen-Wen Zhou, Hsin Lin, S. Basak, A. Bansil, Y. -B. Huang, H. Ding, Z. Wang, Stephen D. Wilson, V. Madhavan
Physical Review Letters 106, 206805 (2011)


2008


Coexistence of competing orders with two energy gaps in real and momentum space in high-Tc superconductor Bi2Sr2-xLaxCuO6+δ
J.-H. Ma, Z.-H. Pan, F. C. Niestemski, M. Neupane, Y.-M. Xu, P. Richard, K. Nakayama, T. Sato, T. Takahashi, H.-Q. Luo, L. Fang, H.-H. Wen, Ziqiang Wang, H. Ding, V. Madhavan
PRL 101, 207002 (2008)


2007


A distinct bosonic mode in an electron-doped high-transition-temperature superconductor
F. C. Niestemski, S. Kunwar, S. Zhou, Shiliang Li, H. Ding, Ziqiang Wang, Pengcheng Dai, V. Madhavan Nature 450, 1058-1061 (13 December 2007)


Pre-2007


Imaging the granular structure of high-Tc superconductivity in underdoped Bi2Sr2CaCu2O8+δ K. M. Lang, V. Madhavan, J. E. Hoffman, E.W. Hudson, H. Eisaki, S. Uchida, J. C. Davis
Nature 415, 412 (2002)

Observation of spectral evolution during the formation of a Ni2 Kondo molecule
V. Madhavan, T. Jamneala, K. Nagaoka, W. Chen, Je-Luen Li, Steven G. Louie, M. F. Crommie
Phys. Rev. B 66, 212411 (2002)

A four unit cell periodic pattern of quasi-particle states surrounding vortex cores Bi2Sr2CaCu2O8+δ
J. E. Hoffman, E.W. Hudson, K.M. Lang, V. Madhavan, S.H. Pan, H. Eisaki, S. Uchida, J.C. Davis
Science 295, 466 (2002)

Interplay of magnetism and high-Tc superconductivity at individual Ni impurity atoms in Bi2Sr2CaCu2O8+δ
E.W. Hudson, K. M. Lang, V. Madhavan, S. H. Pan, H. Eisaki, S. Uchida, J. C. Davis
Nature 411, 920-924 (2001)

Local spectroscopy of a Kondo impurity: Co on Au(111)
V. Madhavan, W. Chen, T. Jamneala, M.F. Crommie, N.S. Wingreen
Phys. Rev. B 64, 165412 (2001)

Kondo response of a single antiferromagnetic chromium trimer T. Jamneala, V. Madhavan, M.F. Crommie
Phys. Rev. Lett. 87, 256804 (2001)

Scanning tunneling spectroscopy of transition-metal impurities at the surface of gold
T. Jamneala, V. Madhavan, W. Chen, M.F. Crommie
Phys. Rev. B 61, 9990 (2000)

Disappearance of Kondo resonance for artificially fabricated cobalt dimers
W. Chen, T. Jamneala, V. Madhavan, M. F. Crommie
Phys. Rev. B 60, R8529 (1999)

Scanning Tunneling Microscopy Observation of an Electronic Superlattice at the Surface of Clean Gold
W. Chen, V. Madhavan, T. Jamneala, M.F. Crommie Phys. Rev. Lett. 80, 1469 (1998)

Tunneling into a Single Magnetic Atom: Spectroscopic Evidence of the Kondo Resonance
V. Madhavan, W. Chen, T. Jamneala, M.F. Crommie, N.S. Wingreen
Science 280, 567 (1998)