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Correlated Electrons/Emergent Phenomena/Many-Body Physics
 
 
Antiferromagnetic Mott Insulators and Correlated Phenomena: "New spectroscopy takes aim at an unsolved electronics mystery"
For our works on High Tc and correlated superconductors (2000- present), see, (SCES page)

Exotic Superconductivity and P.W.Anderson theorem? (Princeton 2019)

Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet ( Science 2019 )
is based on our theoretical prediction of Weyl loops and topological surface states in quantum magnet ( PRL 2017 )

Discovery of Topological Magnets : 2D TopoMagnets, 3D Weyl magnets etc. (APS invited talk)

Keynote Talk at Hubbard theory consortium summer school (London) "Topo.Order in Real Materials"

First report of magnetically doped TI (massive Dirac fermions) appears in 2008 (Fig-5)
Magnetically doped TI (massive Dirac fermions, Chern gap) in 2010 (Fig-15)
Nature Physics 8, 616 (2012)
Nature Physics 7, 32-37 (2011)
Phys, Rev. B 86, 205127 (2012)
Phys. Rev. Lett. 119, 156401 (2017)
Nature 562, 91–95 (2018)
Phys. Rev. Lett. 123, 196604 (2019)
Nature Physics 15, 443–448(2019)
Science 365, 1278 (2019)
Nature Commun. 11, 559 (2020)
Nature (in press) (2020)

Flatband quantum magnetism in a Kagome magnet (Nature Physics 2019)
News & Views: "An upside-down magnet" (Nature Physics 2019)

A quantum magnet with a topological twist (Discovery/Research at Princeton 2019)

Tunable Berry Curvature Through Magnetic Phase Competition in a Topological/Correlated Kagome Magnet (Nature 2018 --> Preprint 2019)

Quantum Phase Transition of Correlated Iron-Based Superconductivity
Physical Review Letters (2019)


Quantum Vortex Matter (Many-body vortex physics) PRB (2019)

Frustrated Kagome lattice (Quantum many-body physics) (NATURE 2018)

Topological Kondo insulator candidate (Nature Commun. 2013)

Hedgehog spin-texture in a magnetic topo. insulator (Nature Physics 2012)


2017 Sir Neville Mott Lecture Series (London)

Lecture at Hubbard theory consortium (London)

Recent research on correlated electrons/emergent phenomena is supported by DOE and Gordon and Betty Moore Foundation..


 
 

53. Experimental signatures of phase interference and sub-femtosecond time dynamics on the incident energy axis of resonant inelastic x-ray scattering.
L. A. Wray, S.-W. Huang, Y. Xia, et al.;

Phys. Rev. B 91, 035131 (2015).

52. Two distinct topological phases in the mixed-valence compound YbB6 and its differences from SmB6.
T.-R. Chang, T. Das, P.-J. Chen, et al.;

Phys. Rev. B 91, 155151 (2015).

51. Surface states in lightly hole-doped sodium cobaltate Na1-yCoO2.
M.-Y. Yao, L. Miao, N. L. Wang, et al.;

Phys. Rev. B 91, 161411(R) (2015).

50. Non-Kondo-like Electronic Structure in the Correlated Rare-Earth Hexaboride YbB6.
M. Neupane, S.-Y. Xu, N. Alidoust, et al.,

Phys. Rev. Lett. 114, 016403 (2015).

49. Fermi-level electronic structure of a topological insulator cuprate-superconductor based heterostructure in the superconducting proximity effect regime.
S.-Y. Xu, C. Liu, A. Richardella, et al.;

Phys. Rev. B 90, 085128 (2014).

48. Spin-correlated electronic state on the surface of a spin-orbit Mott system.
C. Liu, S.-Y. Xu, N. Alidoust, et al.;

Phys. Rev. B 90, 045127 (2014).

47. Surface electronic structure of the topological Kondo-insulator candidate correlated electron system SmB6.
M. Neupane, N. Alidoust, S.-Y. Xu, et al.;

Nature Commun. 4, 2991 (2013).

46. Interplay between ferromagnetism, surface states, and quantum corrections in a magnetically doped topological insulator.
D. Zhang, A. Richardella, D. W. Rench, et al.;

Phys, Rev. B 86, 205127 (2012).

45. Deviating band symmetries and many-body interactions in a model hole-doped iron pnictide superconductor.
L.A. Wray, R. Thomale, C. Platt, et al.;

Phys. Rev. B 86, 144515 (2012).

44. Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator.
S.-Y. Xu, M. Neupane, C. Liu, et al.;

Nature Phys. 8, 616 (2012).

43. Bulk intergrowth of a topological insulator with a room-temperature ferromagnet.
H. Ji, J.M. Allred, N. Ni, et al.

Phys. Rev. B 85, 165313 (2012).

42. Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca10(Pt3As8)(Fe2As2)5.
M. Neupane, C. Liu, S.-Y. Xu, et al.;

Phys. Rev. B 85, 094510 (2012).

41. Coexisting pseudogap, charge-transfer-gap, and Mott-gap energy scales in the resonant inelastic x-ray scattering spectra of electron-doped cuprate superconductors.
S. Basak, T. Das, H. Lin, et al.;

Phys. Rev. B 85, 075104 (2012).

40. Spin-orbital ground states of superconducting doped topological insulators: A Majorana platform.
L. A. Wray, S.-Y Xu, Y. Xia, et al.;

Phys. Rev. B 83, 224516 (2011).

39. Topological electronic structure in half-Heusler topological insulators.
W. A.-Sawai, H. Lin, R.S. Markiewicz, et al.;

Phys. Rev. B 82, 125208 (2010).

38. Low Energy Electronic Structures in Electron-Doped and Hole-Doped Superconducting (Ba/K)(Fe/Co)2As2.
D. Qian, Y. Xia, L. Wray, et al.;

J. Supercond. Nov. Magn. 23, 617 (2010).

37. Half-Heusler ternary compounds as new multifunctional experimental platforms for topological quantum phenomena.
H. Lin, L. A. Wray, Y. Xia, et al.;

Nature Mater. 9, 546 49 (2010).

36. Development of ferromagnetism in the doped topological insulator Bi2- xMnxTe3.
Y.S. Hor, P. Roushan, H. Beidenkopf, et al.;

Phys. Rev. B 81, 195203 (2010).

35. Fermi surface topology and low-lying quasiparticle dynamics of parent Fe1+xTe/Se superconductor.
Y. Xia, D. Qian, L. Wray, et al.;

Phys. Rev. Lett. 103, 037002 (2009).

34. Intermediate dimensional character of charge transfer excitation modes in a two-leg cuprate ladder.
L. Wray, D. Qian, D. Hsieh, et al.;

Journal of Physics and Chemistry of Solids 69, 3146 (2008).

33. Magnetic excitations in triangular lattice NaCrO2.
D. Hsieh, D. Qian, R.F. Berger, et al.;

Journal of Physics and Chemistry of Solids 69, 3174 (2008).

32. The observation of gapped quasiparticles near the metal-insulator transition in NaxCoO2.
Y. Xia, D. Qian, D. Hsieh, et al.;

Journal of Physics and Chemistry of Solids 69 (12), 2986 (2009).

31. Momentum dependence of superconducting gap, strong-coupling dispersion kink, and tightly bound Cooper pairs in the high-Tc (Sr,Ba)1-x(K,Na)xFe2As2 superconductors.
L. Wray, D. Qian, D. Hsieh, et al.;

Phys. Rev. B 78, 184508 (2008).

30. X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition.
Y.W. Li, D. Qian, L. Wray, et al.;

Phys. Rev. B 78, 073104 (2008).

29. Dispersive collective charge modes in a spin 1/2 cuprate ladder.
L. Wray, D. Qian, D. Hsieh, et al.;

Physica B 403, 1456 458 (2008).

28. Observation of gapped quasiparticles in sodium charge-ordered Na1/2CoO2.
Y. Xia, D. Qian, D. Hsieh, et al.;

Physica B 403, 1007 009 (2008).

27. Evolution of low-lying states in a doped CDW superconductor CuxTiSe2.
D. Qian, D. Hsieh, L. Wray, et al.;

Physica B 403, 1002 004 (2008).

26. Unconventional spin order in the triangular lattice system NaCrO2: A neutron scattering study.
D. Hsieh, D. Qian, R.F. Berger, et al.;

Physica B 403, 1341 343 (2008).

25. Acoustic plasmons and doping evolution of Mott physics in resonant inelastic x-ray scattering from cuprate superconductors.
R.S. Markiewicz, M.Z. Hasan, A. Bansil, et al.;

Phys. Rev. B 77, 094518 (2008).

24. Anomalous Metallic State of Cu0.07TiSe2: An Optical Spectroscopy Study.
G. Li, W.Z. Hu, J. Dong, et al.;

Phys. Rev. Lett. 99, 167002 (2007).

23. Dispersive collective charge modes in an incommensurately modulated cuprate Mott insulator.
L. Wray, D. Qian, D. Hsieh, et al.;

Phys. Rev. B 76, 100507(R) (2007).

22. Collective charge modes in quasi-1D Mott insulator SrCuO2.
L. Wray, D. Qian, Y.W. Li, et al.;

Physica C 460, 460 61 (2007).

21. Low-energy excitations and Fermi surface topology of parent cobaltate superconductor.
M.Z. Hasan, D. Qian, M. Foo, et al.;

Physica C 460, 186 189 (2007).

20. Emergence of Fermi Pockets in a New Excitonic Charge-Density-Wave Melted Superconductor.
D. Qian, D. Hsieh, L. Wray, et al.;

Phys. Rev. Lett. 98, 117007 (2007).

19. Semimetal-to-Semimetal Charge Density Wave Transition in 1T-TiSe2.
G. Li, W. Z. Hu, D. Qian, et al.;

Phys. Rev. Lett. 99, 027404 (2007).

18. Low-lying quasiparticle modes and hidden collective charge instabilities in parent cobaltates superconductors NaxCoO2.
D. Qian, D. Hsieh, L. Wray, et al.;

Phys. Rev. Lett. 96, 216405 (2006).

17. Complete d-Band dispersion relation and small Fermion scale in NaxCoO2.
D. Qian, L. Wray, D. Hsieh, et al.;

Phys. Rev. Lett. 97, 186405 (2006).

16. Quasiparticle's quantum coherence and dynamics in the vicinity of metal-insulator phase transition in NaxCoO2.
D. Qian, L. Wray, D. Hsieh, et al.;

Phys. Rev. Lett. 96, 046407 (2006).

15. Quasiparticle Dynamics in the Vicinity of Metal-Insulator Phase Transition in NaxCoO2.
D. Qian, L. Wray, D. Hsieh, et al.;

Phys. Rev. Lett. 96, 046407 (2006).

14. Low-lying electronic structure of triangular cobaltite.
A. P. Kuprin, M. Z. Hasan, Y. D. Chuang, et al.;

Journal of Physics and Chemistry of Solids 67 (1), 235 (2006).

13. Are cobaltates conventional An ARPES viewpoint.
M. Z. Hasan, D. Qian, M. L. Foo, and R. J. Cava;

Annals of Physics 321 (7), 1568 (2006).

12. Momentum-structure of remnant Mott-gap in prototype hole doped cuprates.
Y. Li, M. Z. Hasan, H. Eisaki, and S. Uchida;

Journal of Physics and Chemistry of Solids 66 (12), 2207 (2005).

11. Dispersion relation of charge gap excitations in quasi-1D Mott insulators studied by resonant X-ray scattering.
D. Qian, Y. Li, M. Z. Hasan et al.;

Journal of Physics and Chemistry of Solids 66 (12), 2212 (2005).

10. Fermi surface topology and quasiparticle dynamics of host NaxCoO2 investigated by ARPES.
M. Z. Hasan, Y.-D. Chuang, D. Qian, et al.;

Phys. Rev. Lett. 92, 246402 (2004).

9. Correlated Charge Excitations in Quasi-Low-Dimensional Mott Insulators.
M. Z. Hasan, Y.-D. Chuang, Y. Li, et al.;

International Journal of Modern Physics B 17, 3519 (2003).

8. Particle-Hole Pair Excitations in a Quasi-Zero-Dimensional Mott Insulator.
M. Z. Hasan, Y.-D. Chuang, Y. Li, et al.;

International Journal of Modern Physics B 17, 3513 (2003).

7. Direct Spectroscopic Evidence of Holons in a Quantum Antiferromagnetic Spin-1/2 Chain.
M. Z. Hasan, Y.-D. Chuang, Y. Li, et al.;

International Journal of Modern Physics B 17, 3479 (2003).

6. Momentum-resolved Charge Modes (Holons) in a Prototype 1-D Mott Insulator Studied by Inelastic Resonant X-ray Scattering.
M. Z. Hasan, P. A. Montano, E. D. Isaacs, et al.;

Phys. Rev. Lett. 88, 177403 (2002).

5. Charge excitations in a quantum antiferromagnet.
M. Z. Hasan, E. D. Isaacs, Z. X. Shen, and L. L. Miller;

Physica C: Superconductivity 364, 618 (2001).

4. Inelastic X-ray scattering as a novel tool to study electronic excitations in complex insulators.
M. Z. Hasan, E. D. Isaacs, Z. X. Shen, and L. L. Miller;

Journal of Electron Spectroscopy and Related Phenomena 114, 705 (2001).

3. Momentum-resolved resonant inelastic X-ray scattering as a novel tool to study electronic structure of complex insulators.
M.Z. Hasan, E.D. Isaacs, and Z.X. Shen;

Physica C 364, 265 (2001).


2. Electronic Structure of Mott Insulators Studied by Inelastic (Resonant Inelastic) X-ray Scattering.
M. Z. Hasan, E. D. Isaacs, Z. X. Shen, et al.;

Science 288, 1811 (2000).

1. Particle-hole excitations in insulating Mott antiferromagnet Ca2CuO2Cl2.
M. Z. Hasan, E. D. Isaacs, Z. X. Shen, et al.

Physica C: Superconductivity 341, 781 (2000).