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Oct 10, 2016
Computational Physics
Strongly Correlated Electrons
Machine Learning

Accelerate Monte Carlo Simulations with Restricted Boltzmann Machines

Despite their exceptional flexibility and popularity, the Monte Carlo methods often suffer from slow mixing times for challenging statistical physics…
Jun 12, 2015
Superconductivity
Materials Science
Strongly Correlated Electrons

Predicting Unconventional High Temperature Superconductors in Trigona…

Cuprates and iron-based superconductors are two classes of unconventional high Tc superconductors based on 3d transition elements. Recently, two prin…
Dec 06, 2017
Superconductivity

Magneto-elastic coupling in Fe-based superconductors

We used polarization-resolved Raman scattering to study the magneto-elastic coupling in the parent compounds of several families of Fe-based supercon…
Dec 12, 2017
Strongly Correlated Electrons
Mathematical Physics

Surface energy of the one-dimensional supersymmetric $t-J$ model with…

We investigate the thermodynamic limit of the exact solution, which is given by an inhomogeneous $T-Q$ relation, of the one-dimensional supersymmetri…
Mar 02, 2018
Superconductivity
Materials Science
Strongly Correlated Electrons

Neutron spin resonance in the 112-type iron-based superconductor

We use inelastic neutron scattering to study the low-energy spin excitations of 112-type iron pnictide Ca$_{0.82}$La$_{0.18}$Fe$_{0.96}$Ni$_{0.04}$As…
Aug 10, 2016
Materials Science
Mesoscale and Nanoscale Physics

Topological Nodal Line Semimetals in CaP3 family of materials

We propose that CaP3 family of materials, which include CaP3, CaAs3, SrP3, SrAs3 and BaAs3 can host a three-dimensional topological nodal line semime…
Apr 15, 2016
Superconductivity
Strongly Correlated Electrons

Observation of non-Fermi liquid behavior in hole-doped LiFe$_{1-x}$…

We synthesized a series of V-doped LiFe$_{1-x}$V$_x$As single crystals. The superconducting transition temperature $T_c$ of LiFeAs decreases rapidly …
Nov 23, 2014
Strongly Correlated Electrons

Fermionic non-Abelian fractional Chern insulators from dipolar inte…

We study fermions on a triangular lattice model that exhibits topological flatbands characterized by nonzero Chern numbers. Our scheme stems from the…
Jul 13, 2017
Mesoscale and Nanoscale Physics

Enhanced electron dephasing in three-dimensional topological insulato…

Study of the dephasing in electronic systems is not only important for probing the nature of their ground states, but also crucial to harnessing the …
Oct 27, 2017

Demonstration of irreversibility and dissipation relation of thermo…

We investigate experimentally the relation between thermodynamical irreversibility and dissipation on a superconducting Xmon qubit. This relation als…
Nov 09, 2016
Superconductivity

There have been continuous efforts in searching for unconventional superconductivity over the past five decades. Compared to the well-established d-wave superconductivity in cuprates, the existence of superconductivity with other high-angular-moment…

Observation of Anomalous Magnetic Moments in Superconducting Bi/Ni …

There have been continuous efforts in searching for unconventional superconductivity over the past five decades. Compared to the well-established d-w…
Apr 30, 2017
Mesoscale and Nanoscale Physics

Interaction-driven Quantum Anomalous Hall Effect in Halogenated Hemat…

Based on first-principle calculations and $k\cdot p$ model analysis, we show that the quantum anomalous Hall (QAH) insulating phase can be realized i…
Jul 27, 2018
Mesoscale and Nanoscale Physics

All "Magic Angles" Are "Stable" Topological

We show that the electronic structure of the low-energy bands in the small angle-twisted bilayer graphene consists of a series of semi-metallic and t…
Feb 09, 2015

Role of initial system-bath correlation on coherence trapping

We study the coherence trapping of a qubit correlated initially with a non-Markovian bath in a pure dephasing channel. By considering the initial qub…
Jan 20, 2015
Strongly Correlated Electrons
Superconductivity

Anomalous High-Energy Waterfall-Like Electronic Structure in 5d Tra…

The layered 5d transition metal oxides like Sr2IrO4 have attracted significant interest recently due to a number of exotic and new phenomena induced …
Jul 04, 2018
Superconductivity
Materials Science
Strongly Correlated Electrons

Doping effects of Cr on the physical properties of BaFe$_{1.9-x}$Ni…

We present a systematic study on the heavily Cr doped iron pnictides BaFe$_{1.9-x}$Ni$_{0.1}$Cr$_{x}$As$_{2}$ by using elastic neutron scattering, hi…
Mar 27, 2017
Materials Science

$d$-Orbital Topological Insulator and Semimetal in Antifluorite Cu$_2…

We reveal a class of three-dimensional $d$-orbital topological materials in the antifluorite Cu$_2$S family. Derived from the unique properties of lo…
Sep 12, 2017
Optics

Observation of optical vortices in momentum space

Vortex, the winding of a vector field in two dimensions, has its core the field singularity and its topological charge defined by the quantized windi…
Mar 11, 2015
Mesoscale and Nanoscale Physics

Evidence for Half-Metallicity in n-type HgCr2Se4

High quality HgCr$_2$Se$_4$ single crystals have been investigated by magnetization, electron transport and Andreev reflection spectroscopy. In the f…
Nov 07, 2017
Mesoscale and Nanoscale Physics

Controllable two-dimensional robust multiferroic GaTeCl monolayer wit…

We propose through first-principles investigation that GaTeCl monolayer is an excellent two-dimensional multiferroics with giant mechanical anisotrop…
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