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Topological corner modes in a brick lattice with nonsymmorphic symmetry
Yuhan Liu, Yuzhu Wang, Nai Chao Hu +3
The quest for new realizations of higher-order topological system has garnered much recent attention. In this work, we propose a paradigmatic brick lattice model where corner modes…
Tidal surface states as fingerprints of non-Hermitian nodal knot metals
Xiao Zhang, Guangjie Li, Yuhan Liu +3
Non-Hermitian nodal knot metals (NKMs) contains intricate complex-valued energy bands gives rise to knotted exceptional loops and new topological surface states. We introduce a for…
Chiral voltage propagation in a self-calibrated topolectrical Chern circuit
Tobias Hofmann, Tobias Helbig, Ching Hua Lee +2
We propose an electric circuit array with topologically protected uni-directional voltage modes at its boundary. Instead of external bias fields or floquet engineering, we employ n…
Anatomy of skin modes and topology in non-Hermitian systems
Ching Hua Lee, Ronny Thomale
A non-Hermitian system can exhibit extensive sensitivity of its complex energy spectrum to the imposed boundary conditions, which is beyond any known phenomenon from Hermitian syst…
Mass enhancements and band shifts in strongly hole overdoped Fe-based pnictide superconductors: KFeAs and CsFeAs
S. -L. Drechsler, H. Rosner, V. Grinenko +11
The interplay of high and low-energy mass renormalizations with band-shifts reflected by the positions of van Hove singularities (VHS) in the normal state spectra of the highest ho…
Band structure engineering and reconstruction in electric circuit networks
Tobias Helbig, Tobias Hofmann, Ching Hua Lee +4
We develop an approach to design, engineer, and measure band structures in a synthetic crystal composed of electric circuit elements. Starting from the nodal analysis of a circuit…
Topologically Enhanced Harmonic Generation in a Nonlinear Transmission Line Metamaterial
You Wang, Li-Jun Lang, Ching Hua Lee +2
Nonlinear transmission lines (NLTLs) are nonlinear electronic circuits commonly used for parametric amplification and pulse generation. It has previously been shown that harmonic g…
Floquet Mechanism for Non-Abelian Fractional Quantum Hall States
Ching Hua Lee, Wen Wei Ho, Bo Yang +2
Three-body correlations, which arise between spin-polarized electrons in the first excited Landau level, are believed to play a key role in the emergence of enigmatic non-Abelian f…
Electromagnetic response of quantum Hall systems in dimensions five and six and beyond
Ching Hua Lee, Yuzhu Wang, Youjian Chen +1
Quantum Hall (QH) states are arguably the most ubiquitous examples of nontrivial topological order, requiring no special symmetry and elegantly characterized by the first Chern num…
Anharmonic phonon effects on linear thermal expansion of trigonal bismuth selenide and antimony telluride crystals
Chee Kwan Gan, Ching Hua Lee
We adopted and extended an efficient Grüneisen formalism to study the phonon anharmonicity and linear thermal expansion coefficients (TECs) of trigonal bismuth selenide (BiSe$_…
Realistic Floquet semimetal with exotic topological linkages between arbitrarily many nodal loops
Linhu Li, Ching Hua Lee, Jiangbin Gong
Valence and conduction bands in nodal loop semimetals (NLSMs) touch along closed loops in momentum space. If such loops can proliferate and link intricately, NLSMs become exotic to…