David Hsieh Caltech Physics Department MC 149-33 1200 East California Blvd. Pasadena, CA 91125 Professional History Education Office: (626) 395-4758 Fax: (626) 395-3955 Email: dhsieh@caltech.edu California Institute of Technology, Pasadena, CA. ⋄ Assistant Professor of Physics 9/2012 - present Massachusetts Institute of Technology, Cambridge, MA. ⋄ Pappalardo Fellow in Physics Faculty Mentor: Prof. Nuh Gedik 2009 - 2012 Princeton University, Princeton, NJ. ⋄ Ph.D. in Physics Thesis Topic: Experimental Condensed Matter Physics Thesis Advisor: Prof. Zahid Hasan 2003 - 2009 Stanford University, Stanford, CA. ⋄ B.S. in Mathematics ⋄ B.S. in Physics with Honors Thesis Topic: Experimental Atomic Physics Thesis Advisor: Prof. Steven Chu 1999 - 2003 Honors and Awards ⋄ William L. McMillan Award in Condensed Matter Physics (2012) ⋄ MIT Pappalardo Postdoctoral Fellowship (2009) Refereed Publications Y.-H. Wang, D. Hsieh, E. J. Sie, H. Steinberg, D. R. Gardner, Y. S. Lee, P. JarilloHerrero and N. Gedik, “Measurement of an intrinsic Dirac fermion cooling on the surface of the Bi2 Se3 topological insulator using time-resolved and angle-resolved photoemission spectroscopy,” Phys. Rev. Lett. 109, 127401 (2012). J. W. McIver*, D. Hsieh*, S. G. Drapcho, D. H. Torchinsky, D. R. Gardner, Y. S. Lee and N. Gedik, “Theoretical and experimental study of second harmonic generation from the surface of the topological insulator Bi2 Se3 ,” Phys. Rev. B 86, 035327 (2012). D. Hsieh, F. Mahmood, D. H. Torchinsky, G. Cao and N. Gedik, “Observation of a metal-to-insulator transition with both Mott-Hubbard and Slater characteristics in Sr2 IrO4 from time-resolved photocarrier dynamics”, Phys. Rev. B 86, 035128 (2012). J. W. McIver*, D. Hsieh*, H. Steinberg, P. J. Herrero and N. Gedik, “Control over topological insulator photocurrents with light polarization,” Nature Nano. 7, 96 (2012). Y.-H. Wang, D. Hsieh, D. Pilon, L. Fu, D. Gardner, Y. S. Lee and N. Gedik, “Observation of a warped helical spin texture in Bi2 Se3 from circular dichroism angle-resolved photoemission spectroscopy,” Phys. Rev. Lett. 107, 207602 (2011). D. H. Torchinsky, J. W. McIver, D. Hsieh, G. F. Chen, J. L. Luo, N. L. Wang and N. Gedik, “Nonequilibrium quasiparticle relaxation dynamics in single crystals of hole and electron doped BaFe2 As2 ,” Phys. Rev. B 84, 104518 (2011). D. Hsieh, F. Mahmood, J. W. McIver, D. R. Gardner, Y. S. Lee and N. Gedik, “Selective probing of photoinduced charge and spin dynamics in the bulk and surface of a topological insulator,” Phys. Rev. Lett. 107, 077401 (2011). D. Hsieh*, J. W. McIver*, D. H. Torchinsky, D. R. Gardner, Y. S. Lee and N. Gedik, “Nonlinear optical probe of tunable surface electrons on a topological insulator,” Phys. Rev. Lett. 106, 057401 (2011). L. A. Wray, S.-Y. Xu, Y. Xia, D. Hsieh, A. V. Fedorov, Y. S. Hor, R. J. Cava, A. Bansil, H. Lin and M. Z. Hasan, “A topological insulator surface under strong Coulomb, magnetic and disorder perturbations,” Nature Phys. 7, 32 (2011). D. Hsieh, L. Wray, D. Qian, Y. Xia, J.-H. Dil, F. Meier, L. Patthey, J. Osterwalder, G. Bihlmayer, Y. S. Hor, R. J. Cava and M. Z. Hasan, “Direct observation of spinpolarized surface states in the parent compound of a topological insulator using spinand angle-resolved photoemission spectroscopy in a Mott-polarimetry mode,” New J. Phys. 12, 125001 (2010). Y. S. Hor, P. Roushan, H. Beidenkopf, J. Seo, D. Qu, J. G. Checkelsky, L. A. Wray, D. Hsieh, Y. Xia, S.-Y. Xu, D. Qian, M. Z. Hasan, N. P. Ong, A. Yazdani, and R. J. Cava, “Development of ferromagnetism in the doped topological insulator Bi2−x Mnx Te3 ,” Phys. Rev. B 81, 195203 (2010). D. Hsieh, Y. Xia, D. Qian, L. Wray, F. Meier, J. H. Dil, J. Osterwalder, L. Patthey, A. V. Fedorov, H. Lin, A. Bansil, D. Grauer, Y. S. Hor, R. J. Cava, and M. Z. Hasan, “Observation of time-reversal-protected single-Dirac-cone topological-insulator states in Bi2 Te3 and Sb2 Te3 ,” Phys. Rev. Lett. 103, 146401 (2009). D. Hsieh, Y. Xia, D. Qian, L. Wray, J. H. Dil, F. Meier, J. Osterwalder, L. Patthey, J. G. Checkelsky, N. P. Ong, A. V. Fedorov, H. Lin, A. Bansil, D. Grauer, Y. S. Hor, R. J. Cava and M. Z. Hasan, “A tunable topological insulator in the spin helical Dirac transport regime,” Nature 460, 1101 (2009). P. Roushan, J. Seo, C. V. Parker, Y. S. Hor, D. Hsieh, D. Qian, A. Richardella, M. Z. Hasan, R. J. Cava and A. Yazdani, “Topological surface states protected from backscattering by chiral spin texture,” Nature 460, 1106 (2009). Y. Xia, D. Qian, L. Wray, D. Hsieh, G. F. Chen, J. L. Luo, N. L. Wang, and M. Z. Hasan, “Fermi surface topology and low-lying quasiparticle dynamics of parent Fe1+x Te/Se superconductor,” Phys. Rev. Lett. 103, 037002 (2009). Y. Xia, D. Qian, D. Hsieh, L. Wray, A. Pal, H. Lin, A. Bansil, D. Grauer, Y. S. Hor, R. J. Cava, M. Z. Hasan, “Observation of a large-gap topological-insulator class with a single Dirac cone on the surface,” Nature Phys. 5, 398 (2009). D. Hsieh, Y. Xia, L. Wray, D. Qian, A. Pal, J. H. Dil, F. Meier, J. Osterwalder, G. Bihlmayer, C. L. Kane, Y. S. Hor, R. J. Cava and M. Z. Hasan, “Observation of unconventional quantum spin textures in topological insulators,” Science 323, 919 (2009). L. Wray, D. Qian, D. Hsieh, Y. Xia, L. Li, J. G. Checkelsky, A. Pasupathy, K. K. Gomes, A. V. Fedorov, G. F. Chen, J. L. Luo, A. Yazdani, N. P. Ong, N. L. Wang and M. Z. Hasan, “Momentum dependence of superconducting gap, strong-coupling dispersion kink, and tightly bound Cooper pairs in the high-Tc (Sr,Ba)1−x (K,Na)x Fe2 As2 superconductors,” Phys. Rev. B 78, 184508 (2008). D. Hsieh, D. Qian, R. F. Berger, R. J. Cava, J. W. Lynn, Q. Huang and M. Z. Hasan, “Magnetic excitations in triangular lattice NaCrO2 ,” J. Phys. Chem. Solids 69, 3174 (2008). Y. W. Li, D. Qian, L. Wray, D. Hsieh, Y. Xia, Y. Kaga, T. Sasagawa, H. Takagi, R. S. Markiewicz, A. Bansil, H. Eisaki, S. Uchida, and M. Z. Hasan, “X-ray imaging of dispersive charge modes in a doped Mott insulator near the antiferromagnet/superconductor transition,” Phys. Rev. B 78, 073104 (2008). D. Hsieh, D. Qian, L. Wray, Y. Xia, Y. S. Hor, R. J. Cava and M. Z. Hasan, “A topological Dirac insulator in a quantum spin Hall phase,” Nature 452, 970 (2008). D. Hsieh, D. Qian, R. F. Berger, R. J. Cava, J. W. Lynn, Q. Huang and M. Z. Hasan, “Unconventional spin order in the triangular lattice system NaCrO2 : A neutron scattering study,” Physica B 403, 1341 (2008). G. Li, W. Z. Hu, J. Dong, D. Qian, D. Hsieh, M. Z. Hasan, E. Morosan, R. J. Cava and N. L. Wang, “Anomalous metallic state of Cu0.07 TiSe2 : An optical spectroscopy study,” Phys. Rev. Lett. 99, 167002 (2007). L. Wray, D. Qian, D. Hsieh, Y. Xia, H. Eisaki and M. Z. Hasan, “Dispersive collective charge modes in an incommensurately modulated cuprate Mott insulator,” Phys. Rev. B 76, 100507(R) (2007). G. Li, W. Z. Hu, D. Qian, D. Hsieh, M. Z. Hasan, E. Morosan, R. J. Cava and N. L. Wang, “Semimetal-to-semimetal charge density wave transition in 1T-TiSe2 ,” Phys. Rev. Lett. 99, 027404 (2007). D. Qian, D. Hsieh, L. Wray, E. Morosan, N. L. Wang, Y. Xia, R. J. Cava, and M. Z. Hasan, “Emergence of Fermi pockets in a new excitonic charge-density-wave melted superconductor,” Phys. Rev. Lett. 98, 117007 (2007). D. Qian, L. Wray, D. Hsieh, L. Viciu, R. J. Cava, J. L. Luo, D. Wu, N. L. Wang, and M. Z. Hasan, “Complete d-band dispersion relation in sodium cobaltates,” Phys. Rev. Lett. 97, 186405 (2006). D. Qian, D. Hsieh, L. Wray, Y.-D. Chuang, A. Fedorov, D. Wu, J. L. Luo, N. L. Wang, L. Viciu, R. J. Cava, and M. Z. Hasan, “Low-lying quasiparticle states and hidden collective charge instabilities in parent cobaltate superconductors,” Phys. Rev. Lett. 96, 216405 (2006). D. Qian, L. Wray, D. Hsieh, D. Wu, J. L. Luo, N. L. Wang, A. Kuprin, A. Fedorov, R. J. Cava, L. Viciu, and M. Z. Hasan, “Quasiparticle dynamics in the vicinity of metal-insulator phase transition in Nax CoO2 ,” Phys. Rev. Lett. 96, 046407 (2006). Books The Experimental Discovery of Topological Insulators, by D. Hsieh, VDM Verlag (2009). Other Articles L. Wray, D. Hsieh, D. Qian, Y. Xia, G. F. Chen, J. L. Luo, N. L. Wang and M. Z. Hasan, “Observation of intertwined Fermi surface topology, orbital parity symmetries and electronic interactions in iron arsenide superconductors”. Preprint at <http://arxiv.org/abs/0912.5089>. D. Hsieh, Y. Xia, L. Wray, D. Qian, K. Gomes, A. Yazdani, G. F. Chen, J. L. Luo, N. L. Wang and M. Z. Hasan, “Experimental determination of the microscopic origin of magnetism in parent iron pnictides”. Preprint at <http://arxiv.org/abs/0812.2289>. Y. Xia, D. Qian, D. Hsieh, R. Shankar, H. Lin, A. Bansil, A. V. Fedorov, D. Grauer, Y. S. Hor, R. J. Cava and M. Z. Hasan, “Topological Control: Systematic control of topological insulator Dirac fermion density on the surface of Bi2 Te3 ”. Preprint at <http://arxiv.org/abs/0907.3089>. Teaching Experience ⋄ Instructor, Caltech Physics 125b Winter quarter 2013 ⋄ Teaching assistant, Caltech Physics 1a Fall quarter 2012 ⋄ Student mentor, MIT Undergraduate Research Opportunities Program 2009 - 2012 ⋄ Student mentor, Princeton Center for Complex Materials REU Program 2006, 2007 ⋄ Student mentor, Princeton Summer Undergraduate Research Experience Program 2007, 2008 Invited Talks ⋄ “Seeing and controlling the surface states of a topological insulator with ultrafast lasers”. UIUC Condensed Matter Seminar , March 15, 2013. ⋄ “Topological insulators”. UIUC Physics Colloquium: McMillan Award Lecture, March 13, 2013. ⋄ “Seeing and controlling the surface states of a topological insulator with ultrafast lasers”. BIRS Workshop on Topological Phenomena in Quantum Dynamics and Disordered Systems, February 7, 2013. ⋄ “Seeing and controlling the surface states of a topological insulator with ultrafast lasers”. ICTP Workshop on Majorana Fermions, Non-Abelian Statistics and Topological Quantum Information Processing , August 22, 2012. ⋄ “What topology teaches us about the electronic properties of solids”. MIT Lincoln Laboratories Seminar , June 14, 2012. ⋄ “Time-resolved surface optical studies of topological insulator Bi2 Se3 ”. 2012 NSLS/CFN Joint Users’ Meeting , May 23, 2012. ⋄ “Experimental identification and manipulation of topological insulators”. Caltech Physics Research Conference, November 10, 2011. ⋄ “Seeing and controlling the surface states of a topological insulator with ultrafast lasers”. Caltech Condensed Matter Physics Seminar , December 6, 2010. ⋄ “Seeing and controlling the surface states of a topological insulator with ultrafast laser pulses”. University of British Columbia Condensed Matter Physics Seminar , December 2, 2010. ⋄ “Quantum spin textures in topological insulators”. Boston College Condensed Matter Physics Seminar , October 26, 2010. ⋄ “A new generation of insulators for the electronics future”. MIT Pappalardo Fellows Symposium, May 14, 2010. ⋄ “Tunable topological insulators with a single spin-polarized surface Dirac cone”. APS March Meeting , March 15, 2010. ⋄ “Experimental signatures and control of topological insulators”. Caltech Condensed Matter Physics Seminar , March 8, 2010. ⋄ “Experimental signatures of a topological insulator”. Harvard Condensed Matter Theory Kid’s Seminars, September 29, 2009. ⋄ “Experimental signatures of a topological insulator”. MIT Chez Pierre Seminar , September 28, 2009. ⋄ “Spin-resolved ARPES : The method to detect topological order in insulators”. Novel Topological States in Condensed Matter Physics, University of Hong Kong, June 22-24, 2009. ⋄ “Experimental realizations of topological insulators in three-dimensions”. Gotham-Metro Condensed Matter Meeting , April 25, 2009.