Welcome, and thank you for stopping by.
	Daoxin Yao Postdoctoral Research Associate (I have moved) Condensed Matter Theory Department of Physics Purdue University 525 Northwestern Ave, Physics 269 West Lafayette, IN 47907 Tel: 765-494-5547(o) Email: dyao at purdue.edu

Research

I am interested in Strongly correlated electronic systems, High temperature superconductivity, Graphene, Magnetism, Computational Physics, Phase transitions, etc. More specifically, I study spin and charge orderings in cuprate superconductors, iron-based superconductors, nickelates and other layered perovskites. Using Quantum Monte Carlo methods and exact diagonalization, I investigate quantum phase transitions and critical phenomena. I also study noval quantum phase transitions which do not belong to conventional theories. Graphene and Frustrated spin systems are my favorite research fields too. During my MA+BA study, I worked on quantum solvable models, geometric phase, quantum optics, etc.

• Ph.D. in Physics, Boston University, Boston, USA, Aug 2001-Apr 2007.
• M.S. in Theoretical Physics, Zhejiang University, Hangzhou, China, Mar 1998.
• Visiting graduate, Fukui University, Fukui, Japan, Oct 1996- Oct 1997.
• B.S. in Physics, Zhejiang University, Hangzhou, China, Jun 1994.

• Postdoctoral Research Associate, University of Tennessee and Oak Ridge National Lab, 2009.9 - present
• Postdoctoral Research Associate, Purdue University, 2007.4 - 2009.8
• Research Assistant, Boston University, 2003.1-2007.3
• Teaching Fellow, Boston University, 2001-2002, five semesters
• Worked in Beijing, China, 1998.4-2001.8

Associations

22. V. N. Kotov, D. X. Yao, A. H. Castro Neto, D. K. Campbell, “Unconventional Quantum Phase Transition in a Ring-Exchange Antiferromagnet,” Physical Review B 80, 174403 (2009)

21. D. X. Yao and E. W. Carlson, “Magnetic Excitations of Undoped Oxypnictides,” Frontiers of Physics in China (2009): Iron-based Superconductors.

20. S. Li, D. X. Yao, Y. Qiu, H. J. Kang, E. W. Carlson, J. P. Hu, G. F. Chen, N. L. Wang, Pengcheng Dai, “Low-energy Ce spin excitations in CeFeAsO and CeFeAsF,” Frontiers of Physics in China (2009): Iron-based Superconductors.


19. P. G. Freeman, S. M. Hayden, C. D. Frost, M. Enderle, D. X. Yao, E. W. Carlson, D. Prabhakaran, and A. T. Boothroyd, “Inward dispersion of the spin excitation spectrum of stripe-ordered La2NiO4,” Physical Review B 80, 144523 (2009).

18. J. Zhao, D. T. Adroja , D. X. Yao, R. Bewley, S. Li, X. F. Wang, G. Wu, X. H. Chen, J. P. Hu, and P. Dai, “Spin Waves and Magnetic Exchange Interactions in CaFe2As2,” Nature Phyics 5, 555 (2009).

17. W.-F. Tsai, D. X. Yao, B. A. Bernevig and J. P. Hu, “Novel properties in Josephson junctions involving the cos(kx)cos(ky)-pairing state in iron-pnictides,”Physical Review B 80, 012511 (2009), selected for the August 1, 2009 issue of Virtual Journal of Applications of Superconductivity.

16. J. Zhao, D. X. Yao, S. Li, T. Hong, Y. Chen, S. Chang, W. RatcliffII, J. W. Lynn, H. A. Mook, G. F. Chen, J. L. Luo, N. L. Wang, E. W. Carlson, J. P. Hu and Pengcheng Dai, “Low energy spin waves and magnetic interactions in SrFe2As2,” Physical Review Letters 101, 167203 (2008), selected for the October 15, 2008 issue of Virtual Journal of Applications of Superconductivity.

15. D. X. Yao and E. W. Carlson, “Magnetic Excitations in the High Tc Iron Pnictides,” Physical Review B 78, 052507 (2008), selected for the September 1, 2008 issue of Virtual Journal of Applications of Superconductivity.

14. D. X. Yao, Y. L. Loh, E. W. Carlson and M. Ma, “XXZ and Ising Spins on the Triangular Kagome Lattice,” Physical Review B 78, 024428 (2008).

13. Y. L. Loh, D. X. Yao and E. W. Carlson, “Dimers on the Triangular Kagome Lattice,” Physical Review B 78, 224410 (2008).

12. Y. L. Loh, D. X. Yao, and E. W. Carlson, “Thermodynamics of Ising spins on the triangular kagome lattice: Exact analytic method and Monte Carlo simulations,” Physical Review B 77, 134402 (2008).  

11. Y. J. Jiang, D. X. Yao, E. W. Carlson, H. D. Chen and J. P. Hu, “d+id'-wave Superconducting States in Graphene,” Physical Review B 77, 235420 (2008).

10. D. X. Yao and E. W. Carlson, “Incompatibility of modulated checkerboard patterns with the neutron scattering resonance peak in cuprate superconductors,” Physical Review B 77, 024503 (2008), arXiv:0708.1966, Selected for the Jan. 15, 2008 issue of the Virtual Journal of Applications of Superconductivity.

9. V. N. Kotov, D. X. Yao, A. H. Castro Neto, D. K. Campbell,“Quantum phase transitions beyond the dilue Bose gas limit,” Proceedings of SCES'07, Houston, arXiv:0704.2439.

8. D. X. Yao and E. W. Carlson, “Spin-wave Dispersion in Half-doped LaSrNiO,” Physical Review B 75, 012414 (2007).

7. D. X. Yao, A. W. Sandvik, “Universal Scaling of the Neel Temperature of Near-Quantum-Critical Quasi-Two-Dimensional Heisenberg Antiferromagnets,” Physical Review B 75, 052411 (2007).

6. D. X. Yao, E. W. Carlson, D. K. Campbell, “Magnetic Excitations of Stripes and Checkerboards in the Cuprates,” Physical Review B 73, 224525 (2006).

5. D. X. Yao, E. W. Carlson, D. K. Campbell, “Magnetic Excitations of Stripes Near a Quantum Critical Point,” Physical Review Letters 97, 017003 (2006).

4. E. W. Carlson, D. X. Yao, D. K. Campbell, “Spin Waves in Striped Phases,” Physical Review B 70, 064505 (2004).

3. Jing-Bo Xu and Dao-Xin Yao,“Geometric Phases and Probabilities for an Alkali Atom in a Strong Magnetic Field,”Physica Scripta. 59. 411 (1999).

2. Dao-Xin Yao, Jingbo Xu, “The Spin Evolution of the Neutral Particle in a Time-dependent Magnetic field and Geometric Phases,” Acta Sinica Quantum Optica.3. 226 (1997).

1. Jingbo Xu, Dao-Xin Yao, Shoufu Cai, “Time Evolution of the Alkali Atom in a Strong Magnetic Field and Aharonov-Anandan Phase,” Chinese Journal of Atom and Molecular Physics. 2. 280 (1995).