37 citations · 273 across the 38 of their papers we have counts for
39 papers
Radio-Frequency Detection of Fabry-Pérot Interference and Quantum Capacitance in Long-Channel Three-Dimensional Dirac Semimetal Cd3As2 Nanowires
Sung Jin An, Jisu Kim, Myung-Chul Jung +10
We demonstrate phase-coherent transport in suspended long-channel Cd3As2 nanowire devices using both direct current (DC) transport and radio-frequency (RF) reflectometry measuremen…
NHSE-Driven Coalescence of Topological Defect States in Non-Hermitian Systems
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
In this work, we describe a novel localization phenomena, the so-called topological defect accumulation, occurring in a non-Hermitian chain with an arbitrary number of defect sites…
Reconfigurable Defect States in Non-Hermitian Topolectrical Chains with Gain and Loss
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md Saddam Hossain Razo +1
We investigate the interplay between the non-Hermitian skin effect (NHSE), parity-time (PT) symmetry, and topological defect states in a finite non-Hermitian Su-Schrieffer-Heeger (…
Protected chaos in a topological lattice
Haydar Sahin, Hakan Akgün, Zhuo Bin Siu +4
The erratic nature of chaotic behavior is thought to erode the stability of periodic behavior, including topological oscillations. However, we discover that in the presence of chao…
Anomalous Non-Hermitian Skin Effects in Coupled Hermitian Chains with Cross-Coupling
S M Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
In this work, we demonstrate the presence of an anomalous non-Hermitian skin effects which decay from both ends of a system consisting of two coupled Hermitian chains induced by no…
Dynamic Manipulation of Non-Hermitian Skin Effect through Frequency in Topolectrical Circuits
S M Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
One of the most fascinating phenomena in non-Hermitian systems is the extensive accumulation of the bulk eigenstates under open-boundary conditions which is known as the non-Hermit…
Saturation Dynamics in Non-Hermitian Topological Sensing Systems
S. M. Rafi-Ul-Islam, Zhuo Bin Siu, Md. Saddam Hossain Razo +1
A class of non-Hermitian topological sensors (NTOSs) was recently proposed in which the NTOS comprises a non-Hermitian Su-Schrieffer-Heeger chain with a measurant-dependent couplin…
Spin Orbit Torque on a Curved Surface
Seng Ghee Tan, Che Chun Huang, Mansoor B. A. Jalil +1
We provide a general formulation of the spin-orbit coupling on a 2D curved surface. Considering the wide applicability of spin-orbit effect in spinor-based condensed matter physics…
Valley Hall Effect and Kink States in Topolectrical Circuits
S M Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin +1
We investigate the emergence of topological valley Hall and kink states in a two-dimensional topolectrical (TE) model as a result of broken chiral and reflection symmetries. The TE…
Impedance responses and size-dependent resonances in topolectrical circuits via the method of images
Haydar Sahin, Zhuo Bin Siu, S. M. Rafi-Ul-Islam +3
Resonances in an electric circuit occur when capacitive and inductive components are present together. Such resonances appear in admittance measurements depending on the circuit's…
Semiclassical spin transport in LaO/STO system in the presence of multiple Rashba spin orbit couplings
Anirban Kundu, Zhuo Bin Siu, Jalil Mansoor B. A
The interaction between the linear and cubic spin-orbit coupling with magnetic moments and mobile spin-polarized carriers in the LaO/STO system provides new avenues for spin transp…
System size dependent topological zero modes in coupled topolectrical chains
S M Rafi-Ul-Islam, Zhuo Bin Siu, Haydar Sahin +2
In this paper, we demonstrate the emergence and disappearance of topological zero modes (TZMs) in a coupled topolectrical (TE) circuit lattice. Specifically, we consider non-Hermit…
Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in Weyl semimetals with tilted energy dispersion
Anirban Kundu, M. B. A. Jalil
Ruderman-Kittel-Kasuya-Yosida (RKKY) is an essential long range magnetic interaction between magnetic impurities or magnetic layered structures, the magnitude of which oscillates w…
Giant anisotropic photocurrent modulated by strain in type-II Weyl semimetal Td-MoTe2
Xinru Wang, Ying Ding, M. N. Chen +3
We build a Cu-MoTe2-Cu device model and use first-principles density functional theory to study the transport properties of single-layer Td-MoTe2. We obtained the effect of strain…
Valley-dependent transport in strain engineering graphene heterojunctions
Fei Wan, Xinru Wang, Liehong Liao +6
We study the effect of the strain on the band structure and the valley-dependent transport property of graphene heterojunctions. It is found that valley-dependent separation of ele…
Higher Chern Number States in Curved Periodic Nanowires
Zhuo Bin Siu, Seng Ghee Tan, Mansoor B. A. Jalil
The coupling between the spin and momentum degrees of freedom due to spin-orbit interactions (SOI) suggests that the strength of the latter can be modified by controlling the motio…
Strain-Modulated Graphene Heterostructure as a Valleytronic Current Switch
Maverick Chauwin, Zhuo Bin Siu, Mansoor Bin Abdul Jalil
Strain engineering is a promising approach for suppressing the OFF-state conductance in graphene-based devices that arises from Klein tunnelling. In this work, we derive a comprehe…
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 topological phases and exceptional lines in topolectrical circuits
S M Rafi-Ul-Islam, Zhuo Bin Siu, Mansoor B. A. Jalil
We propose a scheme to realize various non-Hermitian topological phases in a topolectrical (TE) circuit network consisting of resistors, inductors, and capacitors. These phases are…
Zitterbewegung-mediated RKKY coupling in topological insulator thin films
Cong Son Ho, Zhuo Bin Siu, Seng Ghee Tan +1
The dynamics of itinerant electrons in topological insulator (TI) thin films is investigated using a multi-band decomposition approach. We show that the electron trajectory in the…
Magnetotransport of Weyl semimetals with tilted Dirac cones
Anirban Kundu, Hyunsoo Yang, M. B. A. Jalil
Weyl semimetals (WSM) exhibit chiral anomaly in their magnetotransport due to broken conservation laws. Here, we analyze the magnetotransport of WSM in the presence of the time-rev…
Controllable pn junctions in threedimensional Dirac semimetal CdAs nanowires
Janice Ruth Bayogan, Kidong Park, Zhuo Bin Siu +11
We demonstrate a controllable pn junction in a threedimensional Dirac semimetal (DSM) CdAs nanowire with two recessed bottom gates. The device exhibits four different…
Transport across a topoelectrical Weyl semimetal heterojunction
S M Rafi-Ul-Islam, Zhuo Bin Siu, Mansoor B. A. Jalil
We propose a general method to realize and calculate the transmission in a Weyl semimetal (WSM) heterostructure by employing a periodic three-dimensional topoelectrical (TE) circui…