191 citations · 1.4k across the 35 of their papers we have counts for
35 papers
Tunable second harmornic in altermagnetic Josephson junctions
Hai-Peng Sun, Song-Bo Zhang, Chang-An Li +1
We study the influence of external electric and Zeeman fields on the Josephson effect in a planar superconductor/altermagnet/superconductor junction. Remarkably, we find that the c…
Non-Hermitian Mott Skin Effect
Tsuneya Yoshida, Song-Bo Zhang, Titus Neupert +1
We propose a novel type of skin effects in non-Hermitian quantum many-body systems which we dub a non-Hermitian Mott skin effect. This phenomenon is induced by the interplay betwee…
Klein-bottle quadrupole insulators and Dirac semimetals
Chang-An Li, Junsong Sun, Song-Bo Zhang +2
The Benalcazar-Bernevig-Hughes (BBH) quadrupole insulator model is a cornerstone model for higher-order topological phases. It requires π-flux threading through each plaquette of t…
Nonlinear planar magnetotransport due to tilted Dirac cones in topological materials
Arya Thenapparambil, Graciely Elias dos Santos, Chang-An Li +7
Nonlinear planar magnetotransport is ubiquitous in topological HgTe structures, both in tensile (topological insulator) or compressively strained layers (Weyl semimetal phase). We…
Finite-momentum Cooper pairing in proximitized altermagnets
Song-Bo Zhang, Lun-Hui Hu, Titus Neupert
Finite-momentum Cooper pairing is an unconventional form of superconductivity that is widely believed to require finite magnetization. Altermagnetism is an emerging magnetic phase…
Enhancement of Second-Order Non-Hermitian Skin Effect by Magnetic Fields
Chang-An Li, Björn Trauzettel, Titus Neupert +1
The non-Hermitian skin effect is a unique phenomenon in which an extensive number of eigenstates are localized at the boundaries of a non-Hermitian system. Recent studies show that…
Helical Topological Superconducting Pairing at Finite Excitation Energies
Masoud Bahari, Song-Bo Zhang, Chang-An Li +4
We propose helical topological superconductivity away from the Fermi surface in three-dimensional time-reversal-symmetric odd-parity multiband superconductors. In these systems, pa…
Magnetic topological transistor exploiting layer-selective transport
Hai-Peng Sun, Chang-An Li, Sang-Jun Choi +3
We propose a magnetic topological transistor based on MnBiTe, in which the "on" state (quantized conductance) and the "off" state (zero conductance) can be easily switc…
Emergent Edge Modes in Shifted Quasi-One-Dimensional Charge Density Waves
Song-Bo Zhang, Xiaoxiong Liu, Md Shafayat Hossain +3
We propose and study a two-dimensional (2D) phase of shifted charge density waves (CDW), which is constructed from an array of weakly coupled 1D CDW wires whose phases shift from o…
Symmetry breaking and spectral structure of the interacting Hatano-Nelson model
Song-Bo Zhang, M. Michael Denner, Tomáš Bzdušek +2
We study the Hatano-Nelson model, i.e., a one-dimensional non-Hermitian chain of spinless fermions with nearest-neighbour nonreciprocal hopping, in the presence of repulsive neares…
Dirac States in an Inclined Two-Dimensional Su-Schrieffer-Heeger Model
Chang-An Li, Sang-Jun Choi, Song-Bo Zhang +1
We propose to realize Dirac states in an inclined two-dimensional Su-Schrieffer-Heeger model on a square lattice. We show that a pair of Dirac points protected by space-time invers…
Transition from metal to higher-order topological insulator driven by random flux
Chang-An Li, Song-Bo Zhang, Jan Carl Budich +1
Random flux is commonly believed to be incapable of driving full metal-insulator transitions in non-interacting systems. Here we show that random flux can after all induce a full m…
Intrinsic finite-energy Cooper pairing in superconductors
Masoud Bahari, Song-Bo Zhang, Björn Trauzettel
We show that Cooper pairing can occur intrinsically away from the Fermi surface in superconductors with strong spin-orbit coupling and equally curved bands in the normal st…
Intertwined Weyl phases emergent from higher-order topology and unconventional Weyl fermions via crystalline symmetry
W. B. Rui, Zhen Zheng, Moritz M. Hirschmann +3
We discover three-dimensional intertwined Weyl phases, by developing a theory to create topological phases. The theory is based on intertwining existing topological gapped and gapl…
Super-resonant transport of topological surface states subjected to in-plane magnetic fields
Song-Bo Zhang, Chang-An Li, Francisco Peña-Benitez +4
Magnetic oscillations of Dirac surface states of topological insulators are expected to be associated with the formation of Landau levels or the Aharonov-Bohm effect. We instead st…
Higher-order Fabry-Pérot Interferometer from Topological Hinge States
Chang-An Li, Song-Bo Zhang, Jian Li +1
We propose an intrinsic 3D Fabry-Pérot type interferometer, coined "higher-order interferometer", that utilizes the chiral hinge states of second-order topological insulators and c…
Directional electron-filtering at a superconductor-semiconductor interface
Daniel Breunig, Song-Bo Zhang, Björn Trauzettel +1
We evaluate the microscopically relevant parameters for electrical transport of hybrid superconductor-semiconductor interfaces. In contrast to the commonly used geometrically const…
Higher-order Weyl superconductors with anisotropic Weyl-point connectivity
W. B. Rui, Song-Bo Zhang, Moritz M. Hirschmann +3
Weyl superconductors feature Weyl points at zero energy in the three-dimensional (3D) Brillouin zone and arc states that connect the projections of these Weyl points on the surface…
Analytical solution for the surface states of antiferromagnetic topological insulator MnBiTe
Hai-Peng Sun, C. M. Wang, Song-Bo Zhang +7
Recently, the intrinsic magnetic topological insulator MnBiTe has attracted great attention. It has an out-of-plane antiferromagnetic order, which is believed to open a siz…
Anisotropic vortices on superconducting Nb(110)
Artem Odobesko, Felix Friedrich, Song-Bo Zhang +4
We investigate the electronic properties of type-II superconducting Nb(110) in an external magnetic field. Scanning tunneling spectroscopy reveals a complex vortex shape which deve…
All-electrically tunable networks of Majorana bound states
Song-Bo Zhang, Alessio Calzona, Björn Trauzettel
Second-order topological superconductors (SOTSs) host localized Majorana fermions and provide a new platform for topological quantum computation. We propose a remarkable and feasib…
Topological and holonomic quantum computation based on second-order topological superconductors
Song-Bo Zhang, W. B. Rui, Alessio Calzona +3
Majorana fermions feature non-Abelian exchange statistics and promise fascinating applications in topological quantum computation. Recently, second-order topological superconductor…
Quantum oscillations in acoustic phonons in Weyl semimetals
Song-Bo Zhang, Jianhui Zhou
We theoretically study the modification of the energy spectrum of long-wavelength acoustic phonons due to the electron-phonon interaction in a three-dimensional topological Weyl se…
Detection of second-order topological superconductors by Josephson junctions
Song-Bo Zhang, Björn Trauzettel
We study Josephson junctions based on second-order topological superconductors (SOTSs) which can be realized in quantum spin Hall insulators with large inverted gap in proximity to…