Group Members

Research Publications Lab Facilities
Computation Platform
Internal Links
  Group Members

  Principal Investigator:

M. Zahid Hasan (Zahid)

Eugene Higgins Professor of Physics (2017- )
Princeton University. Professor of Physics (2011--)
Robert H. Dicke fellow in fundamental physics at Princeton (2002) (Independent Researcher)
NE Visiting Scientist at Bell Laboratories (2002-03)
PhD (2002) Stanford University & Stanford Linear Accelerator Center (SLAC National Lab)/Stanford Univ.

Project-Lead: Led multiple mid-scale scientific collaborations at/or between/among Berkeley Lab, Stanford/SLAC, Bell Laboratories (Research), ESRF (France) and Brookhaven National Laboratory.
All projects funded by U.S.DOE.


Lead-P.I. : Theory Team on Topological Matter
Theory funded by multiple agencies
Berkeley Lab projects
GBMF-EPIQS funded theory projects
Topological materials discovery theory projects
Chern/Kagome/Weyl/Exotic magnet discovery theory
P.I. : Princeton team-lead on Anyon/Majorana research under DOE(QIS research); GBMF/Moore foundation and Princeton Univ. funds

P.I. Ultrafast & Coherent Quantum Phenomena Lab

EPiQS Investigator Quantum Matter (including Theory)
GBMF/ Moore Investigator ( STM/STS/AFM/MBE + Theory ) Laboratory for Topological Quantum Matter and Advanced Spectroscopy, Princeton Physics Labs (B-7/B-2/B-9/B-64 Jadwin) include a theory group
Lab website
Moore GBMF webpage
Faculty and Executive Committee (2005-), Engineering-Physics Program, School of Engineering and Applied Science, Princeton University
EP webpage
Faculty (2002-), PRISM (Materials Institute, User of IAC), PRISM webpage

Faculty Member (2016-): Quantum Science and Engineering
QSE (Q. Materials & New Qubits) @ Princeton Univ.
Princeton Quantum Initiative (PQI)

Scientific Member (2020-): Quantum Science Center (QSC) [A National Quantum Information, NQI, Science Research Center of the U.S. Department of Energy (DOE)]
Oak-Ridge National Laboratory

Co-Lead Proposer: MERLIN beamline (ARPES+RIXS) at ALS-LBNL-Berkeley (2005-)
Advanced Light Source, Lawrence Berkeley National Laboratory; ALS-LBNL DOE User Facility
Miller Visiting Professor at UC Berkeley (2016-17)
Lawrence Berkeley National Laboratory (2016--)
LBL webpage

Our group leads, directs or co-leads a number of projects at national and international laboratories including LBNL (Berkeley), SLAC (Stanford), Brookhaven, Paul Scherrer Inst (Switzerland), SOLEIL (France) and Rutherford-Appleton lab (Oxfordshire, UK).
CNMS-SAC Member, Oak Ridge National Laboratory

Princeton Office:
321 Jadwin Hall: Princeton Univ., Princeton, NJ 08540
Email: ;; Phone: 609-258-3044

Berkeley Office:
LBNL/AML Bldg-2; Room-235
1 Cyclotron Rd, Lawrence Berkeley Lab, CA 94720


Brief Bio


Administrative Support:
Katherine Lamos
Office: 311 Jadwin Hall

  ## Unpredicted and/or Unexpected Experimental Discoveries of novel quantum effects (see, Link)

## Theoretical prediction/discovery of novel phases & quantum matter leading to experiments (see, Link)

## Experimental methodologies and novel subroutines developed to make spectroscopy as a decisive probe of quantum topology (see, Link)


Time-reversal symmetry-breaking charge order in a kagome superconductor
NATURE 602, 245-250 (2022)

Charge-order and Superconductivity in Kagome Materials
Nature Physics 18, 137-143 (2022)

Probing topological quantum matter with scanning tunnelling microscopy
Nature Reviews Physics 3, 249-263 (2021)

Weyl, Dirac and high-fold chiral fermions in topological quantum matter
Nature Reviews Materials 6, 784–803 (2021)

Discovery of unconventional chiral charge order in the normal state of kagome superconductor KV3Sb5
Nature Materials (2021)

Photocurrent-driven transient symmetry breaking in the Weyl semimetal TaAs
Nature Materials 21, 62-66 (2022)

Signatures of Weyl Fermion Annihilation in a Correlated Topological Kagome Magnet
Physical Review Letters 127, 256403 (2021)

Many-body Resonance in a Correlated Topological Kagome Antiferromagnet
Physical Review Letters 125, 046401 (2020)

Quantum-limit Chern topological magnetism in TbMn6Sn6 ( 2D Topo.Insulator in a natural magnet)
NATURE 583, 533–536 (2020)

Field-free platform for Majorana-like zero mode in superconductors with a topological surface state
Phys. Rev. B 101, 100507 (2020)

Fermion-boson many-body interplay in a frustrated kagome paramagnet (Theory and Experiments)
Nature Commun. 11, 4003 (2020)

Unconventional photocurrent responses from chiral surface Fermi arcs in topological semimetals (Theoretical prediction)
Physical Review Letters 124, 166404 (2020)

Observation of Weyl fermions in a magnetic non-centrosymmetric crystal (Theory and Experiments)
(Magnetic Weyl Semimetal)
Nature Commun. 11, 3356 (2020)

Spin-orbit quantum impurity in a topological kagome magnet (Theory and Experiments)
Nature Commun. 11, 4415 (2020)

Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet (Theory and Experiments)
Science 365, 1278-1281 (2019)

Quantum phase transition of correlated iron-based superconductivity in LiFe1-xCoxAs (Theory and Experiments)
Physical Review Letters 123, 217004 (2019)

Magnetic-field control of topological electronic response near room temperature in correlated Kagome magnets
Physical Review Letters 123, 196604 (2019)

Topological Chiral Crystals with Helicoid Arc Quantum States (Theory and Experiments)
Nature 567, 500 (2019)

Negative flatband magnetism in a spin-orbit coupled kagome magnet (Theory and Experiments)
Nature Physics 15, 443 (2019)

Giant and anisotropic many-body spin–orbit tunability in a strongly correlated kagome magnet
Nature 562, 91–95 (2018)

Topological quantum properties of chiral crystals (Theoretical Prediction)
Nature Materials 17, 978–985 (2018)

Chiral Majorana Fermion Modes on the Surface of Superconducting Topological Insulators
Europhysics Letters 123, 47005 (2018)

Magnetic Weyl fermion semimetals in the R-AlGe family of compounds (Theoretical Prediction)
Phys. Rev. B 97, 041104(R) (2018)

A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases (Theory and Experiments)
Science Advances 3, e1501692 (2017)

Topological Hopf and Chain Link Semimetal States and Their Application to Co2MnGa (Theoretical Prediction)
Physical Review Letters 119, 156401 (2017)

Mirror Protected Dirac Fermions on a Weyl Semimetal NbP Surface
Physical Review Letters 119, 196403 (2017)

Unconventional chiral fermions and large topological Fermi arcs in RhSi (Theoretical Prediction)
Physical Review Letters 119, 206401 (2017)

Type-II Topological Dirac Semimetals: Theory and Materials Prediction
Physical Review Letters 119, 026404 (2017)

Magnetic tunneling induced Weyl node annihilation in TaP
Nature Physics 13, 979–986 (2017)

Signatures of a time-reversal symmetric Weyl semimetal with only four Weyl points
Nature Commun. 8, 942 (2017)

Discovery of Lorentz-violating Weyl fermion semimetal state in LaAlGe materials
Science Adv. 3, e1603266 (2017)

Discovery of Weyl Fermion Semimetals and Topological Fermi Arc States
Ann. Rev. Cond. Mat. Phys 8, 16 (2017)

Weyl semimetals, Fermi arcs and chiral anomaly
Nature Materials 15, 1140-1144 (2016) (Cover Story)

Discovery of a new type of topological Weyl fermion semimetal state
Nature Commun. 7, 13643 (2016)

A strongly robust type II topological Weyl fermion semimetal state in Ta3S2 (Theoretical Prediction)
Science Adv. 2, e1600295 (2016)

Topological Nodal-Line Fermions in Spin-Orbit Metal PbTaSe2
Nature Commun. 7:10556 (2016)

Superconducting properties in single crystals of the topological nodal semimetal PbTaSe2
Phys. Rev. B 93, 054520 (2016)

Signatures of the Adler-Bell-Jackiw Chiral Anomaly in a Weyl Semimetal
Nature Commun. 7:10735 (2016)

Prediction of an arc-tunable Weyl Fermion metallic state in MoxW1-xTe2 (Theoretical Prediction)
Nature Commun. 7:10639 (2016)

Signatures of Fermi Arcs in the Quasiparticle Interferences of the Weyl Semimetals TaAs and NbP
Physical Review Letters 116, 066601 (2016)

Criteria for Directly Detecting Topological Fermi Arcs in Weyl Semimetals
Physical Review Letters 116, 066802 (2016)

Spin polarization and texture of the Fermi arcs in the Weyl Fermion semimetal TaAs
Physical Review Letters 116, 096801 (2016)

New type of Weyl semimetal with quadratic double Weyl fermions (Theoretical Prediction)
Proc. of Nat'l Acad. of Sci's 113, 1180 (2015).

Experimental discovery of a topological Weyl semimetal state in TaP
Science Adv. 1, 1501092 (2015).

Discovery of a Weyl Fermion state with Fermi arcs in niobium arsenide.
Nature Physics 11, 748 (2015).

Discovery of a Weyl Fermion semimetal and topological Fermi arcs.
Science 349, 613 (2015).

Observation of Fermi Arc Surface States in a Topological Metal.
Science 347, 294 (2015).

A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class (Theoretical Prediction).
Nature Commun. 6:7373 (2015) (submitted Nov. 2014).

Topological Insulators, Topoogical Superconductors and Weyl Fermion Semimetals
Phys. Scr. T164, 014001 (2015)
Proceedings of Nobel Symposium on New Forms of Matter.

Gigantic surface life-time of an intrinsic topological insulator revealed via time-resolved (pump-probe, ultrafast) ARPES.
Physical Review Letters 115, 116801 (2015).

Unconventional transformation of spin Dirac phase across a topological quantum phase transition.
Nature Commun. 6:6870 (2015).

Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators.
Nature Materials 14,318 (2015).

Non-Kondo-like Electronic Structure in the Correlated Rare-Earth Hexaborides.
Physical Review Letters 114, 016403 (2015).

Observation of topological surface state quantum Hall effect in an intrinsic three dimensional topological insulator.
Nature Physics 10, 956 (2014).

Momentum-space imaging of Cooper pairing in a half-Dirac-gas topological superconductor.
Nature Physics 10, 943 (2014).

Observation of monolayer valence band spin-orbit effect and induced quantum well states in MoX2.
Nature Commun. 5, 4673 (2014).

Observation of quantum-tunnelling-modulated spin texture in ultrathin topological insulator Bi2Se3 films.
Nature Commun. 5, 3841 (2014).

Observation of a three-dimensional topological Dirac semimetal phase in high-mobility Cd3As2.
Nature Commun. 5, 3786 (2014).

Surface electronic structure of the topological Kondo-insulator a candidate correlated electron system.
Nature Commun. 4, 2991 (2013).

Observation of Dirac Node Formation and Mass Acquisition in a Topological Crystalline Insulator.
Science 341, 1496 (2013).

Observation of a topological crystalline insulator phase and topological phase transition in Pb1-xSnxTe.
Nature Commun. 3, 1192 (2012).

Topological-Metal to Band-Insulator Transition in (Bi1-xInx)2Se3 Thin Films.
Physical Review Letters 109, 186403 (2012).

Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator.
Nature Physics 8, 616 (2012).

Topological phase transition and texture inversion in a tunable topological insulator.
Science 332, 560 (2011).

A topological insulator surface under strong Coulomb, magnetic and disorder perturbations.
Nature Physics 7, 32 (2011).

Observation of topological order in a superconducting doped topological insulator.
Nature Physics 6, 855 (2010).

Single-Dirac-Cone Topological Surface States in the TlBiSe2 Class of Topological Semiconductors.
Physical Review Letters 105, 036404 (2010).

Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena.
Nature Materials 9, 546 (2010).

Topological surface states protected from backscattering by chiral spin texture.
Nature 460, 1106 (2009).

Observation of Time-Reversal-Protected Single-Dirac-Cone Topological-Insulator States in Bi2Te3 and Sb2Te3.
Physical Review Letters 103, 146401 (2009).

A tunable topological insulator in the spin helical Dirac transport regime.
Nature 460, 1101 (2009).

Fermi surface topology and low-lying quasiparticle dynamics of parent Fe1+xTe/Se correlated superconductor.
Physical Review Letters 103, 037002 (2009).

Observation of a large-gap topological-insulator class with a single Dirac cone on the surface.
Nature Physics 5, 398 - 402 (2009).

Observation of Unconventional Quantum Spin Textures in Topological Insulators.
Science 323, 5916 (2009).

A topological Dirac insulator in a quantum spin Hall phase.
Nature 452, 970-974 (2008).

Design of an elliptically bent refocus mirror for the MERLIN beamline at the Advanced Light Source (at Berkeley Lab)
Nuclear Inst. and Methods in Phys. Res. A 582, 135 (2007).

Anomalous Metallic State of Cu0.07TiSe2: An Optical Spectroscopy Study.
Physical Review Letters 99, 167002 (2007).

Emergence of Fermi Pockets in a New Excitonic Charge-Density-Wave Melted Superconductor.
Physical Review Letters 98, 117007 (2007).

MERLIN - A meV Resolution Beamline at the Adavnced Light Source (at Berkeley Lab)
AIP Conf. Proc. 879, 509 (2007).

Low-lying quasiparticle modes and hidden collective charge instabilities in parent cobaltates superconductors (doped Mott insulator) NaxCoO2.
Physical Review Letters 96, 216405 (2006).

Complete d-Band dispersion relation and small Fermion scale in (doped Mott insulator) NaxCoO2.
Physical Review Letters 97, 186405 (2006).

Quasiparticle's quantum coherence and dynamics in the vicinity of metal-insulator phase transition in (doped Mott insulator) NaxCoO2.
Physical Review Letters 96, 046407 (2006).

Quasiparticle Dynamics in the Vicinity of Metal-Insulator Phase Transition in (doped Mott insulator) NaxCoO2.
Physical Review Letters 96, 046407 (2006).

Random-coil behavior and the dimensions of chemically unfolded proteins.
Proc. Nat. Acad. Sci. 101, 12491 (2004).

Fermi surface topology and quasiparticle dynamics of (parent superconductor) NaxCoO2 investigated by ARPES.
Physical Review Letters 92, 246402 (2004).

Momentum-resolved Charge Modes (Holons) in a Prototype 1-D Mott Insulator Studied by Inelastic Resonant X-ray Scattering.
Physical Review Letters 88, 177403 (2002).

Electronic Structure of Mott Insulators Studied by Inelastic (Resonant) X-ray Scattering.
Science 288, 1811 (2000).

List of Scientific Collaborators