492 citations · 957 across the 12 of their papers we have counts for
9 papers · 1 filter
Topolectrical circuits recent experimental advances and developments
Haydar Sahin, Mansoor B. A. Jalil, Ching Hua Lee
Metamaterials serve as versatile platforms for demonstrating condensed matter physics and non-equilibrium phenomena, with electrical circuits emerging as a particularly compelling…
Zoology of non-Hermitian spectra and their graph topology
Tommy Tai, Ching Hua Lee
We uncover the very rich graph topology of generic bounded non-Hermitian spectra, distinct from the topology of conventional band invariants and complex spectral winding. The graph…
Critical hybridization of skin modes in coupled non-Hermitian chains
S M Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin +2
Non-Hermitian topological systems exhibit a plethora of unusual topological phenomena that are absent in the Hermitian systems. One of these key features is the extreme eigenstate…
Unconventional node voltage accumulation in generalized topolectrical circuits with multiple asymmetric couplings
S M Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin +2
A non-Hermitian system is characterized by the violation of energy conservation. As a result of unbalanced gain or loss in the forward and backward directions due to non-reciprocal…
Non-Hermitian Pseudo-Gaps
Linhu Li, Ching Hua Lee
The notion of a band gap is ubiquitous in the characterization of matter. Particularly interesting are pseudo-gaps, which are enigmatic regions of very low density of states that h…
Quantized classical response from spectral winding topology
Linhu Li, Sen Mu, Ching Hua Lee +1
Topologically quantized response is one of the focal points of contemporary condensed matter physics. While it directly results in quantized response coefficients in quantum system…
Impurity induced scale-free localization
Linhu Li, Ching Hua Lee, Jiangbin Gong
This work develops a full framework for non-Hermitian impurity physics in a non-reciprocal lattice, with PBCs, OBCs and even their interpolations being special cases across a whole…
Geometric classification of non-Hermitian topological systems through the singularity ring
Linhu Li, Ching Hua Lee, Jiangbin Gong
This work unveils how geometric features of two-band non-Hermitian Hamiltonians can completely classify the topology of their eigenstates and energy manifolds. Our approach general…
Hybrid higher-order skin-topological modes in non-reciprocal systems
Ching Hua Lee, Linhu Li, Jiangbin Gong
Higher-order phases are characterized by corner or hinge modes that arise due to the interesting interplay of localization mechanisms along two or more dimensions. In this work, we…