### Faculty

LIU Chang
Associate Professor
0755-88018221
liuc@sustech.edu.cn

Brief Introduction
LIU, Chang, Associate Professor at the Department of Physics, SUSTech. Dr. Liu's research mainly focuses on revealing the novel electronic properties of topologically non-trivial materials, thermoelectric materials and high temperature superconductors; as well as the exotic electronic behavior in graphene and related structures, using angle resolved photoemission spectroscopy (ARPES), scanning tunneling microscopy (STM) and other spectroscopic techniques. His research group also masters the techniques of material growth such as the flux method, chamical vapor transfer (CVT) and molecular beam epitaxy (MBE). On the field of topologically non-trivial materials, his works presented e.g. a gapless topological surface state in magnetic topological insulators, an exotic surface state in three dimensional Dirac semimetals, and the first example of topological crystalline insulator (TCI). On the field of thermoelectric materials, his works revealed the valence band information on a series of SnSe-based high-performance thermoelectric compounds.

Research Interests
1. The technique of angle resolved photoemission spectroscopy (ARPES) and ultrahigh vacuum;
2. Electronic properties of iron-based high temperature superconductors;
3. Exotic electronic behavior in topological insulators and topologically nontrivial materials;
4. Electronic properties of graphene and related structures.

Professional Experiences
2015-Present : Associate Professor, Department of Physics, SUSTC
2014-2015: Assistant Professor, Department of Physics, SUSTC
2011-2014: Postdoctoral Research Associate, Princeton University (USA)

Educational Background
2006-2011: PhD in Condensed Matter Physics, Iowa State University (USA)
2003-2006: BS in Department of Physics, Sun Yat-sen University (China)
2001-2003: Department of Urban Planning, Sun Yat-sen University (China)

Selected Publications

1. 刘畅, 刘祥瑞. 强三维拓扑绝缘体与磁性拓扑绝缘体的角分辨光电子能谱学研究进展. 物理学报 68, 227901 (2019) (特约综述文章)

2. Yu-Jie Hao*, Pengfei Liu*, Yue Feng* et al., Gapless surface Dirac cone in antiferromagnetic topological insulator MnBi2Te4. Phys. Rev. X 9, 041038 (2019) (Physics 精选报道)

3. Wenke He et al., High thermoelectric performance in low-cost SnS0.91Se0.09 crystals. Science 365, 1418 (2019)

4. Xiao-Bo Wang*, Xiao-Ming Ma* et al., Topological surface electronic states in candidate nodal-line semimetal CaAgAs. Phys. Rev. B 96, 161112(R) (2017)

5. Qiangsheng Lu et al., Unexpected large hole effective masses in SnSe revealed by angle-resolved photoemission spectroscopy. Phys. Rev. Lett. 119, 116401 (2017)

6. N. Alidoust, Chang Liu et al., Observation of metallic surface states in the strongly correlated Kitaev-Heisenberg candidate Na2IrO3. Phys. Rev. B 93, 245132 (2016)

7. S. Jiang*, Chang Liu* et al., Structural and magnetic phase transitions in Ca0.73La0.27FeAs2 with electron-overdoped FeAs layers. Phys. Rev. B 93, 054522 (2016)

8. Chang Liu et al., Tunable spin helical Dirac quasiparticles on the surface of three-dimensional HgTe. Phys. Rev. B 92, 115436 (2015)

9. Su-Yang Xu*, Chang Liu* et al., Observation of Fermi arc surface states in a topological metal. Science 347, 294 (2015)

10. Yang Xu, Ireneusz Miotkowski, Chang Liu et al., Observation of topological surface state quantum Hall effect in an intrinsic three-dimensional topological insulator. Nature Physics 10, 956 (2014)

11. Chang Liu et al., Spin-correlated electronic state on the surface of a spin-orbit Mott system. Phys. Rev. B 90, 045127 (2014)

12. Su-Yang Xu, Chang Liu et al., Observation of a topological crystalline insulator phase and topological phase transition in Pb1-xSnxTe. Nature Communications 3, 1192 (2012)

13. Su-Yang Xu, M. Neupane, Chang Liu et al., Hedgehog spin texture and Berry's phase tuning in a magnetic topological insulator. Nature Physics 8, 616 (2012)

14. M. Neupane*, Chang Liu* et al., Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca10(Pt3As8)(Fe2As2)5. Phys. Rev. B 85, 094510 (Editor's suggestion) (2012)

15. R. S. Dhaka, Chang Liu et al., What controls the phase diagram and superconductivity in Ru-substituted BaFe2As2? Phys. Rev. Lett. 107, 267002 (2011)

16. Chang Liu et al., Importance of Fermi surface topology to the superconducting state of the electron-doped pnictide Ba(Fe1-xCox)2As2. Phys. Rev. B 84, 020509(R) (2011)

17. Chang Liu et al., Metallic surface electronic state in half-Heusler compounds RPtBi (R = Lu, Dy, Gd). Phys. Rev. B 83, 205133 (2011)

18. Chang Liu et al., Surface-driven electronic structure in LaFeAsO studied by angle-resolved photoemission spectroscopy. Phys. Rev. B 82, 075135 (Editor's suggestion) (2010)

19. Chang Liu*, Takeshi Kondo* et al., Evidence for a Lifshitz transition in electron-doped iron arsenic superconductors at the onset of superconductivity. Nature Physics 6, 419 (2010)

20. Takeshi Kondo, R. M. Fernandes, R. Khasanov, Chang Liu et al., Unexpected Fermi-surface nesting in the pnictide parent compounds BaFe2As2 and CaFe2As2 revealed by angle-resolved photoemission spectroscopy. Phys. Rev. B 81, 060507(R) (2010)

21. Chang Liu et al., Electronic properties of iron arsenic high temperature superconductors revealed by angle resolved photoemission spectroscopy (ARPES). Physica C 469, 491 (2009)

22. Chang Liu et al., Three- to two-dimensional transition of the electronic structure in CaFe2As2: A parent compound for an iron arsenic high-temperature superconductor. Phys. Rev. Lett. 102, 167004 (2009)

23. Chang Liu et al., K-Doping dependence of the Fermi surface of the iron-arsenic Ba1-xKxFe2As2 superconductor using angle-resolved photoemission spectroscopy. Phys. Rev. Lett. 101, 177005 (2008)

24. Takeshi Kondo, A. F. Santander-Syro, O. Copie, Chang Liu et al., Momentum dependence of the superconducting gap in NdFeAsO0.9F0.1 single crystals measured by angle resolved photoemission spectroscopy. Phys. Rev. Lett. 101, 147003 (2008)

* First author with equal contribution

Contact
Email: liuc@sustech.edu.cn

1088 Xueyuan Avenue, Shenzhen 518055,
P.R. China