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Nature News (Homepage, July 2017) : ..Topology Reshaping Physics

Opening Science Talk (Physics-Next, APS-Physics): ..Quantum Fields to Condensed Matter: New Topological Phases of Matter in Natural and Artificial Materials

"Discovery of New Topological Phases of Matter" (Lawrence Berkeley Lab, 2017)

 


 

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Topologically protected Single Dirac Cone (Spin-Textured)
Nature Physics N&V
 
 
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Moore Symposium Lecture (2014)
 
 
 

Research Highlights:


First five experimental papers on 3DTI (Topological Insulators)


KITP Talk Proc. (2007)

KITP Talk Proc. (2008) "The Hydrogen Atom of Topological Insulator"

"Search&Discovery" Physics Today

A topological Dirac insulator in a quantum spin Hall phase
Nature 452, 970 (2008)
;
D.Hsieh, D.Qian, Y.Xia et.al., [April, '08] Submitted.(2007)

Observation of Unconventional Quantum Spin Textures in Topological Insulators
Science 323, 919 (2009)
;
D.Hsieh, Y.Xia, L.A.Wray et al., [February, '09] Submitted.(2008)

Discovery (Theoretical and Experimental) of a large-gap topological-insulator class with a single Dirac cone on the surface
arXiv version (2008)
;
Y.Xia, D.Qian, L.A.Wray, D.Hsieh et al., [May '09] Submitted.(2008)
Nature Physics 5, 398 (2009);

Extended version at
A tunable topological insulator in the spin helical Dirac transport regime
Nature 460, 1101 (2009)
;
D.Hsieh, Y.Xia, D.Qian et.al., Submitted.(2009)

p-type Bi2Se3 for topological insulator and low-temperature thermoelectric applications.
Phys.Rev.B 79, 195208 (2009)
;
Y.Hor, A.Richardella, Y.Xia, D.Hsieh et.al., [May '09] Submitted.(2009)

Experimental Realization of a Three-Dimensional Topological Insulator Bi2Te3
Science 325,178 (2009)
;
Y.L.Chen, J.Analytis, S.-C. Zhang et al., [Stanford] [June '09] Submitted.(Mar. 2009)


 
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  PhysicsWorld News: "Weyl fermions are spotted at long last"
Discovery of Weyl fermion named a 'breakthrough of the year' by Physics World
News at Lawrence Berkeley National Laboratory (LBNL), MIT physics news
Physics Highlights of the Year 2015 (Physics - American Physical Society)

 
 

First papers on Weyl fermion semimetals


A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
Nature Commun. 6:7373 (2015)
;
S.-M. Huang, S.-Y. Xu, I. Belopolski et al., Submitted (Nov 2014).

Discovery of a Weyl Fermion semimetal and topological Fermi arcs
Science 349, 613 (2015)
;
S.-Y. Xu, I. Belopolski, N. Alidoust et.al., Submitted (Feb 2015).

Weyl Semimetal Phase in Noncentrosymmetric Transition-Metal Monophosphides
Phys. Rev. X 5, 011029 (2015)
;
H. Weng, C. Fang, Z. Fang et al., Submitted (Jan 2015).

Experimental Discovery of Weyl Semimetal TaAs
Phys. Rev. X 5, 031013 (2015)
;
B. Q. Lv, H. M. Weng, B. B. Fu et.al., Submitted (July 2015).


 
 

Weyl Fermion Semimetals


Topological electronic structure and Weyl semimetal in the TlBiSe2 class of semiconductors
B. Singh, A.h Sharma, H. Lin, M. Z. Hasan, R. Prasad, and A. Bansil
Physical Review B 86, 115208 (2012)


Weyl Fermion Semimetal and Fermi arcs: TaAs,TaP, NbAs, NbP, SrSi2

Theoretical Prediction: A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class
S.-M. Huang, S.-Y. Xu, I. Belopolski, C.-C. Lee, G. Chang, B. Wang, N. Alidoust, G. Bian, M. Neupane, C. Zhang, S. Jia, A. Bansil, H. Lin, M. Z. Hasan
Nature Commun. 6:7373 (2015) (submitted Nov. 2014)

Experimental Discovery:
Discovery of a Weyl Fermion semimetal and topological Fermi arcs
S.-Y. Xu, I. Belopolski, N. Alidoust, M. Neupane, G. Bian, C. Zhang, R. Sankar, G. Chang, Z. Yuan, C.-C. Lee, S.-M. Huang, H. Zheng, J. Ma, D. S. Sanchez, B. Wang, A. Bansil, F. Chou, P. P. Shibayev, H. Lin, S. Jia, and M. Z. Hasan
Science 349, 613 (2015)

Discovery of a Weyl Fermion state with Fermi arcs in niobium arsenide
S.-Y. Xu, N. Alidoust, I. Belopolski, Z. Yuan, G. Bian, T.-R. Chang, H. Zheng, V. Strocov, D. S. Sanchez, G. Chang, C. Zhang, D. Mou, Y. Wu, L. Huang, C.-C. Lee, S.-M. Huang, B. Wang, A. Bansil, H.-T. Jeng, T. Neupert, A. Kaminski, H. Lin, S. Jia, and M. Z. Hasan
Nature Physics 11, 748 (2015)

Experimental discovery of a topological Weyl semimetal state in TaP
S.-Y. Xu, I. Belopolski, D. S. Sanchez, C. Guo, G. Chang, C. Zhang, G. Bian, Z. Yuan, H. Lu, Yi. Feng, T.-R. Chang, P. P. Shibayev, M. L. Prokopovych, N. Alidoust, H. Zheng, C.-C. Lee, S.-M. Huang, R. Sankar, F. Chou, C.-H. Hsu, H.-T. Jeng, A, Bansil, T. Neupert, V. N. Strocov, H. Lin, S. Jia, M. Z. Hasan
Science Advances 10, 1501092 (2015)

Transport Experiments: Tantalum Monoarsenide: an Exotic Compensated Semimetal
C. Zhang, Z. Yuan, S.-Y. Xu, Z. Lin, B. Tong, M. Z. Hasan, J. Wang, C. Zhang, S. Jia
arXiv:1502.00251

Observation of the Adler-Bell-Jackiw chiral anomaly in a Weyl semimetal
C. Zhang, S.-Y. Xu, I. Belopolski, Z. Yuan, Z. Lin, B. Tong, N. Alidoust, C.-C. Lee, S.-M. Huang, H. Lin, M. Neupane, D. S. Sanchez, H. Zheng, G. Bian, J. Wang, C. Zhang, T. Neupert, M. Z. Hasan, S. Jia
To appear Nature Commun. (2016)

Observation of Fermi Arc Surface States in a Topological Metal

S.-Y. Xu, C. Liu, S. Kushwaha, R. Sankar, J. Krizan, I. Belopolski, M. Neupane, G. Bian, N. Alidoust, T.-R. Chang, H.-T. Jeng, C.-Y. Huang, W.-F. Tsai, H. Lin, P. P. Shibayev, F. Chou, R. J. Cava, and M. Zahid Hasan

Science 347, 294 (2015)

New type of Weyl semimetal with quadratic double Weyl fermions

S.-M. Huang, S.-Y. Xu, I. Belopolski, C.-C. Lee, G. Chang, B. Wang, N. Alidoust, M. Neupane, H. Zheng, D. Sanchez, A. Bansil, G. Bian, H. Lin, and M. Z. Hasan

PNAS 113, 1180 (2015)

Recent developments:

Unconventional transformation of spin Dirac phase across a topological quantum phase transition
S.-Y. Xu, M. Neupane, I. Belopolski et al.;
Nat. Commun. 6:6870 doi: 10.1038/ncomms7870 (2015).

Observation of non-Kondo-like electronic structure in YbB6
M. Neupane, S.-Y. Xu, N. Alidoust, G. Bian, D.-J. Kim, C. Liu, I. Belopolski, T.-R. Chang, H.-T. Jeng, T. Durakiewicz, H. Lin, A. Bansil, Z. Fisk, M. Z. Hasan;
Phy. Rev. Lett. 114, 016403 (2015)

Dirac mass generation from crystal symmetry breaking on the surfaces of topological crystalline insulators
I. Zeljkovic, Y. Okada, M. Serbyn, R. Sankar, D. Walkup, W. Zhou, J. Liu, G. Chang, Y. J. Wang, M. Z. Hasan, F. Chou, H. Lin, A. Bansil, L. Fu, V. Madhavan;
Nature Materials 14, 318 (2015)

Momentum space imaging of Cooper pairing in a half-Dirac-gas topological superconductor (a helical 2D topological superconductor)

S.-Y. Xu, N. Alidoust, I. Belopolski, A. Richardella, C. Liu, M. Neupane, G. Bian, S.-H. Huang, R. Sankar, C. Fang, B. Dellabetta, W. Dai, Qi Li, M. J. Gilbert, F. Chou, N. Samarth, M. Z. Hasan;

Nature Physics 10, 943 (2014)

Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator (a bulk insulating topological insulator)

Y. Xu, I. Miotkowski, C. Liu, J. Tian, H. Nam, N. Alidoust, J. Hu, C.-K. Shih, M. Z. Hasan, Y. P. Chen 

Nature Physics 10, 956 (2014)

Mapping the unconventional orbital texture in topological crystalline insulators
I. Zeljkovic, Y. Okada, C.-Y. Huang, R. Sankar, D. Walkup, W. Zhou, M. Serbyn, F. Chou, W.-F. Tsai, H. Lin, A. Bansil, L. Fu, M. Z. Hasan, V. Madhavan;
Nature Physics 10, 572 (2014)

Controlling transport of topological and trivial surface states in a topological insulator
Y. Xu, I. Miotkowski , C. Liu, J.Tian, H. Nam, N. Alidoust , J. Hu , C-K. Shih , M. Z. Hasan, Y. Chen;
Nature Materials (submitted) (2014)

Observation of a topological 3D Dirac semimetal phase in Cd3As2

M. Neupane, S.-Y. Xu, R. Sankar, N. Alidoust, G. Bian, C. Liu, I. Belopolski, T.-R. Chang, H.-T. Jeng, H. Lin, A. Bansil, F. Chou, M. Z. Hasan 

Nature Commun. 5, 3786 (2014)

Observation of bulk 3D Dirac multiplet, topological semimetal phase and spin states in Na3Bi

S.-Y. Xu, R. Sankar, N. Alidoust, G. Bian, C. Liu, I. Belopolski, T.-R. Chang, H.-T. Jeng, H. Lin, A. Bansil, F. Chou, M. Z. Hasan 

Preprint (2013)

Tuning a Schottky barrier in a photoexcited topological insulator with transient Dirac cone electron-hole asymmetry (Time-resolved ARPES)

Y. M. Hajlaoui, E. Papalazarou, J. Mauchain, L. Perfetti, A. Taleb-Ibrahimi, F. Navarin, M. Monteverde, P. Auban-Senzier, C.R. Pasquier, N. Moisan, D. Boschetto, M. Neupane, M.Z. Hasan, T. Durakiewicz, Z. Jiang, Y. Xu, I. Miotkowski, Y.P. Chen, S. Jia, H.W. Ji, R.J. Cava, M. Marsi;

Nature Commun. 5, 3003 (2014)

Observation of Quantum-Tunneling Modulated Spin Texture in Ultrathin Topological Insulator Bi2Se3 Films

M. Neupane, A. Richardella, J. Sanchez-Barriga, S.-Y. Xu, N. Alidoust, I. Belopolski, C. Liu, G. Bian, D. Zhang, D. Marchenko, A. Varykhalov, O. Rader, M. Leandersson, T.n Balasubramanian, T.-R. Chang, H.-T. Jeng, S. Basak, H. Lin, A. Bansil, N. Samarth, M. Z. Hasan

Nature Commun. 5, 3841 (2014)

Observation of Dirac node formation and mass acquisition in a topological crystalline insulator

Y. Okada, M. Serbyn, H. Lin, D. Walkup, W. Zhou, C. Dhital, M. Neupane, Suyang Xu, Y. Wang, R. Sankar, F. Chou, A. Bansil, M. Z. Hasan, S. Wilson, L. Fu, V. Madhavan

Science 341, 1496 (2013)

Surface States in a Topological Kondo Insulator Candidate

M. Neupane, N. Alidoust, S.-Y. Xu, T. Kondo, D.-J. Kim, C. Liu, I. Belopolski, T.-R. Chang, H.-T. Jeng, T Durakiewicz, L. Balicas, H.. Lin, A. Bansil, S Shin, Z. Fisk, M. Z. Hasan

Nature Commun. 4, 2991 (2013)


Magnetic Topological Insulators: Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator

S.-Y. Xu, M. Neupane, C. Liu, D. Zhang, A. Richardella, L. A. Wray, N. Alidoust, M. Leandersson, T. Balasubramanian, J. Sanchez-Barriga, O. Rader, G. Landolt, B. Slomski, J.H. Dil, J. Osterwalder, T.-R. Chang, H.-T. Jeng, H. Lin, A. Bansil, N. Samarth, M. Z. Hasan

Nature Physics 8, 616 (2012)


Topological phase transition and texture inversion in a tunable topological insulator

S.-Y.Xu Y. Xia, L. A. Wray, S. Jia, F. Meier, J. H. Dil, J. Osterwalder, B. Slomski, A. Bansil, H. Lin, R. J. Cava, M. Z. Hasan

Science 332, 560 (2011)


Observation of topological order in a superconducting doped topological insulator

L. A. Wray, S.-Y. Xu, Y. Xia, Y. S. Hor, D. Qian, A. V. Fedorov, H. Lin, A. Bansil, R. J. Cava and M. Z. Hasan

Nature Physics 6, 855 (2010)


  NbSe2  
  NbSe2  
  Demonstration of a Fully Bulk Insulating (Intrinsic) Topological Insulator
 
 
Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator.
Published in Y. Xu, I. Miotkowski, C. Liu, J. Tian, H. Nam, N. Alidoust, J. Hu, C.-K. Shih, M. Z. Hasan and Y. P. Chen,
Nature Physics 10, 956 (2014).

 
 
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