Condensed Matter Seminar, Duke University

Regular time and place: Thursdays at 11:30am in Physics 298.
By clicking on calender data, you can import an event into your calendar. You can join the CMseminargroup mailing list to receive email announcements and reminders.

Upcoming events

2018/05/10   Oleg L. Berman  (City University of New York)calender data
"Exciton Bose-Einstein condensation and superfluidity in two-dimensional nanomaterials"

This talk reviews the theoretical studies of the Bose-Einstein condensation (BEC) and superfluidity of indirect excitons and microcavity polaritons in quasi-two-dimensional (quasi-2D) van der Waals nanomaterials such as graphene, phosphorene, and transition metal dichalcogenide (TMDC) heterostructures. Indirect excitons are the Coulomb-bound pairs of electrons and holes confined to different parallel monolayers of a layered planar nanomaterial structure. It has been shown that the indirect excitons in gapped bilayer graphene can form BEC and experience superfluidity [1]. The high-T superfluidity of the two-component weakly-interacting Bose gas of the A-type and B-type indirect excitons in the TMDC heterostructures is proposed [2,3]. The critical temperature and superfluid velocity of the indirect excitons in a bilayer phosphorene nanostructure is shown to be anisotropic, dependent strongly on the particular direction of the exciton propagation [4]. Also analyzed are the effects of high magnetic fields on the BEC and superfluidity of exciton polaritons formed by the direct excitons in gapped monolayer graphene embedded in an optical microcavity to show that the polariton BEC can be manipulated by an external magnetic field [5], whereas the superfluid behavior can be controlled by changing the graphene gap [6]. These results open up new avenues for the experimental realization of the exciton BEC and superfluidity phenomena as well as their practical applications in optoelectronics [7].

[1]  O. L. Berman, R. Ya. Kezerashvili, and K. Ziegler, PRB 85, 035418 (2012)
[2]  O. L. Berman and R. Ya. Kezerashvili, PRB 93, 245410 (2016)
[3]  O. L. Berman and R. Ya. Kezerashvili, PRB 96, 094502 (2017)
[4]  O. L. Berman, G. Gumbs, and R. Ya. Kezerashvili, PRB 96, 014505 (2017)
[5]  O. L. Berman, R. Ya. Kezerashvili, and Yu. E. Lozovik, PRB 80, 115302 (2009)
[6]  O. L. Berman, R. Ya. Kezerashvili, and K. Ziegler, PRB 86, 235404 (2012)
[7]  D. W. Snoke and J. Keeling, Physics Today 70, 54 (2017)

Host: Harold Baranger

Past events

2018/05/07 Hannes Pichler  (Harvard University),   Unusual weekday: Monday!calender data
"Universal photonic quantum computation via time-delayed feedback"
2018/05/01 Chun Ning (Jeanie) Lau  (Ohio State University),   Unusual weekday: Tuesday!calender data
"Spin, charge and heat transport in low-dimensional materials"
2018/04/26 Adolfo del Campo  (University of Massachusetts Boston)calender data
"Tailoring the dynamics of isolated and open quantum systems"
2018/04/19 Charles L. Kane  (University of Pennsylvania)calender data
"Topological superconductivity from Majorana to Fibonacci"
2018/04/17 Dan Shahar  (Weizmann Institute of Science),   Unusual weekday: Tuesday!calender data
"Hot superconductors and cold insulators"
2018/04/10 Manuel Houzet  (Université Grenoble Alpes and CEA),   Unusual weekday: Tuesday!calender data
"Non-equilibrium quasi-particles in disordered superconductors"
2018/03/29 Journal club ft. Anne Draeloscalender data
"Superconductivity and Mott insulating behavior in twisted bilayer graphene"
2018/03/22 Carlos A. R. Sa de Melo  (Georgia Tech)calender data
"Color superfluidity of neutral ultracold fermions in the presence of color-orbit and color-flip fields"
2018/03/15 Journal club ft. Xin Zhangcalender data
"Variational approach to non-equilibrium quantum impurity problems"
2018/02/22 James R. Williams  (University of Maryland, College Park)calender data
"Using Josephson junctions to probe quantum materials"
2018/02/15 Journal club ft. Gu Zhangcalender data
"Geometric phase at quantum phase transitions"
2018/01/11 Sho Yaida  (Duke University)calender data
"Novel phase transition within amorphous solids"
2017/12/07 Thomas Barthel  (Duke University)calender data
"Fractal structures in the phase diagram of the honeycomb-lattice quantum dimer model"
2017/11/16 Aashish Clerk  (University of Chicago)calender data
"Photonic analogues of topological superconductors"
2017/10/26 Dmitri Khveshchenko  (UNC Chapel Hill)calender data
"Thickening and sickening the Sachdev-Ye-Kitaev model"
2017/10/12 Giuseppe Calajo  (TU Wien)calender data
"Atom-light interactions in slow-light waveguide QED"
2017/09/21 Kirill Shtengel  (University of California Riverside)calender data
"Designer non-Abelian anyons and exotic quantum circuitry"
2017/09/07 Elbio R. A. Dagotto  (University of Tennessee and ORNL)calender data
"Computational studies of iron-based high critical temperature superconductors"
2017/09/05 Václav Janiš  (Charles University in Prague, Academy of Sciences of the Czech Republic),   Unusual weekday: Tuesday!calender data
"Quantum dot attached to superconducting leads: Andreev bound states and 0-pi transition"
2017/05/25 Journal club ft. Gu Zhangcalender data
"Transport through many-terminal Majorana islands"
2017/05/11 Journal club ft. Xin Zhangcalender data
"Topology of density matrices"
2017/04/20 Zhenzhong Shi  (National High Magnetic Field Lab)calender data
"Hidden order of Cooper pairs in a striped cuprate at high magnetic fields"
2017/04/06 Subir Sachdev  (Harvard University)calender data
"Confinement transitions of Ising gauge theories"
2017/03/30 Leo Fang  (Duke University)calender data
"Non-Markovian dynamics of a qubit due to photon scattering in a waveguide"
2017/03/23 Francesco Ciccarello  (University of Palermo, NEST, Duke)calender data
"Quantum 'non-Markovianity': new definitions and some recent developments"
2017/02/16 Po-Hao Huang  (Boston University)calender data
"Coupled spin-1/2 ladders as microscopic models for non-Abelian chiral spin liquids"
2017/01/12 Dong Liu  (Microsoft Station Q)calender data
"Majorana Search: Challenges and opportunities"
2016/12/01 Alexander Kemper  (NC State University)calender data
"Understanding complex materials using nonequilibrium spectroscopy: What can theory tell?"
2016/11/22 Informal seminar ft. Ben Lawson  (University of Michigan),   Unusual time: Tuesday, 1:30pm!calender data
"Torque magnetometry on topological superconductor candidate doped Bi2Se3"
2016/11/22 Informal seminar ft. Elbio R. A. Dagotto  (University of Tennessee and ORNL),   Unusual time: Tuesday, 9:30am!calender data
2016/11/15 Kin Chung Fong  (Raytheon BBN Technologies),   Unusual weekday: Tuesday!calender data
"Listening to the noise of Dirac fluid in graphene"
2016/11/10 Shiwei Zhang  (College of William and Mary)calender data
"Computing electron correlation effects: an auxiliary-field perspective"
2016/10/17 Denis Ullmo  (LPTMS, Université Paris Sud),   Unusual weekday: Monday!calender data
"Schrödinger approach to Mean Field Games"
2016/10/11 Yoshitomo Kamiya  (CMT Laboratory, RIKEN),   Unusual weekday: Tuesday!calender data
"Multiferroics by design with frustrated molecular magnets"
2016/09/29 Carlos J. Bolech  (University of Cincinnati)calender data
"Consistency between bosonization and nonequilibrium transport setups"
2016/09/22 Siyuan Dai  (UC San Diego)calender data
"Hyperbolic phonon polaritons in hexagonal boron nitride"
2016/07/18 Huaixiu Zheng  (Yale University),   Unusual weekday: Monday!calender data
"Quantum state smoothing for single microwave photon detection"
2016/04/07 Waseem S. Bakr  (Princeton University)calender data
"Strongly-interacting fermionic superfluids: spin-imbalance, lower dimensionality and topological defects"
2016/03/24 Konstantin Matveev  (Argonne National Lab)calender data
"Electrical and thermal transport in inhomogeneous Luttinger liquids"
2016/03/21 Hao Zhang  (TU Delft),   Unusual weekday: Monday!calender data
"Majorana zero modes in InSb nanowires"
2016/03/10 Eduardo Novais  (Universidade Federal do ABC, Brazil)calender data
"Fidelity of a quantum state protected by the surface code at finite temperatures"
2016/02/29 Journal club ft. Moritz Binder,   Unusual weekday & place: Monday, Physics 205!calender data
"Identification of Hamiltonians and Liouvillians"
2016/02/25 Adriana Moreo  (University of Tennessee, ORNL)calender data
"Robust nematic state in electron-doped pnictides induced by isotropic quenched disorder"
2016/02/11 Arnab Banerjee  (Oak Ridge National Laboratory)calender data
"In search of exotic fermions in spin-liquids - the case of a-RuCl3"
2016/01/21 Gu Zhang  (Duke University)calender data
"Rescuing a quantum phase transition with quantum noise"
2015/12/07 Journal club ft. Moritz Binder,   Unusual weekday: Monday!calender data
"Photonic quantum circuits with time delays"
2015/11/19 Daniel Silevitch  (University of Chicago, Caltech)calender data
"Tunable ground states in a model quantum magnet"
2015/11/12 Catherine Marcoux  (Duke University)calender data
"Limit-periodic structures: self-assembly and sparse vibrational modes"
2015/10/22 Adrian E. Feiguin  (Northeastern University, Boston)calender data
"Building and understanding magnetic nano-structures, one atom at a time"
2015/10/08 Christopher Wilson  (University of Waterloo)calender data
"Quantum electrodynamics in 1D using a superconducting artificial atom"
2015/10/01 François Amet  (Appalachian State University)calender data
"Superconductivity in the quantum Hall regime"
2015/09/24 Journal club ft. Gu Zhangcalender data
"Fate of the Kondo effect and impurity quantum phase transitions through the lens of fidelity susceptibility"
2015/09/10 Journal club ft. Leo Fangcalender data
"A chemical potential for light"
2015/09/03 Journal club ft. Anne Watsoncalender data
"Hot-carrier Seebeck effect: Diffusion and remote detection of hot carriers in graphene"

have a nice day!