Chiral hinge transport in disordered non-Hermitian second-order topological insulators

Article Physics, Multidisciplinary

Unifying the Anderson transitions in Hermitian and non-Hermitian systems

Xunlong Luo et al.

Summary: This study proposes a correspondence between the universality classes of the Anderson transitions in Hermitian and non-Hermitian systems, showcasing the superuniversality phenomenon.

PHYSICAL REVIEW RESEARCH (2022)

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Article Materials Science, Multidisciplinary

Hermitian chiral boundary states in non-Hermitian topological insulators

C. Wang et al.

Summary: In this study, we have discovered that under certain conditions, the chiral boundary states of higher-dimensional non-Hermitian topological insulators can be Hermitian with real eigenenergies. By constructing Hermitian chiral edge and hinge states, these boundary channels exhibit perfect transmission coefficients and are robust against disorders. Furthermore, non-Hermitian topological insulators can undergo a unique topological Anderson insulator transition.

PHYSICAL REVIEW B (2022)

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Article Materials Science, Multidisciplinary

Negative Gilbert damping

Yunshan Cao et al.

Summary: This study demonstrates a negative Gilbert damping through the magneto-optical interaction of laser beams and a magnet placed in an optical cavity. The off-resonant coupling in the far-blue detuning results in a magnetic torque with a negative damping coefficient.

PHYSICAL REVIEW B (2022)

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Article Physics, Multidisciplinary

Coulomb Instabilities of a Three-Dimensional Higher-Order Topological Insulator

Peng-Lu Zhao et al.

Summary: Studies show that 3D second-order topological insulators are unstable under weak Coulomb interactions, undergoing two types of topological phase transitions with different critical exponents. One transition is associated with the emergence of time-reversal and inversion symmetries, while the other lacks emergent symmetries.

PHYSICAL REVIEW LETTERS (2021)

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Article Physics, Multidisciplinary

Universality Classes of the Anderson Transitions Driven by Non-Hermitian Disorder

Xunlong Luo et al.

Summary: The study explores the influence of non-Hermiticity and disorder on Anderson transitions in three-dimensional systems, finding distinct critical behaviors and key exponents under different classifications of non-Hermitian systems, demonstrating that non-Hermiticity changes the universality classes of Anderson transitions.

PHYSICAL REVIEW LETTERS (2021)

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Article Physics, Multidisciplinary

Structural-Disorder-Induced Second-Order Topological Insulators in Three Dimensions

Jiong-Hao Wang et al.

Summary: Researchers predict a second-order topological insulating phase in amorphous systems without any crystalline symmetry, and find that structural disorder can induce this higher-order topological phase.

PHYSICAL REVIEW LETTERS (2021)

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Article Physics, Multidisciplinary

Delocalization Transition of a Disordered Axion Insulator

Zhi-Da Song et al.

Summary: The study demonstrates the stability of the topology of the axion insulator under quenched disorder respecting inversion symmetry, and the emergence of an intermediate metallic phase during the transition to a trivial insulator. The critical exponent of the localization length near the delocalization transition is found to be nu = 1.42 +/- 0.12, and the delocalization transition is shown to be stable even with weak breaking of the average inversion symmetry.

PHYSICAL REVIEW LETTERS (2021)

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Article Materials Science, Multidisciplinary

Non-Hermitian higher-order Weyl semimetals

Sayed Ali Akbar Ghorashi et al.

Summary: The study reveals that non-Hermitian higher-order Weyl semimetals exhibit various configurations of surface Fermi arcs and exceptional Fermi rings when the reality of bulk spectra is lost. Additionally, the discovery of non-Hermitian Weyl nodes originating from non-Hermiticity suggests a unique intrinsically non-Hermitian phase called exceptional HOWSM. Furthermore, the study shows exceptional stability of Fermi arcs, known as exceptional helicity, due to the complex nature of the spectrum.

PHYSICAL REVIEW B (2021)

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Article Materials Science, Multidisciplinary

Non-Hermitian higher-order Dirac semimetals

Sayed Ali Akbar Ghorashi et al.

Summary: This Letter studies three-dimensional non-Hermitian higher-order Dirac semimetals, focusing on their hybrid-PT topological phase and the emergence of exceptional Fermi rings. By applying Hermitian perturbations, various phases are discovered, paving the way for rich phenomena and hybrid functionality to be readily realized in experiment.

PHYSICAL REVIEW B (2021)

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Article Materials Science, Multidisciplinary

Chiral hinge magnons in second-order topological magnon insulators

Alexander Mook et al.

Summary: The study reveals a second-order TMI state in three-dimensional ferromagnets, characterized by excitations at the hinges, and shows the possibility of tunability through atomic-level engineering for robust topological protection. The findings empower magnonics with higher-order topology tools, offering a promising route for low-energy information transfer with three-dimensional vertical integration.

PHYSICAL REVIEW B (2021)

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Article Physics, Multidisciplinary

Universal Hall conductance scaling in non-Hermitian Chern insulators

Solofo Groenendijk et al.

Summary: In this study, we examined the Hall conductance of a two-dimensional Chern insulator coupled to an environment causing gain and loss. We found that strong gain and loss can result in a nonanalytical contribution to the Hall conductance, which exhibits a universal power law behavior near its onset, with a power of 3/2 as a function of Dirac mass, chemical potential, and gain strength. This work paves the way for further research on non-Hermitian topology in fermionic transport experiments.

PHYSICAL REVIEW RESEARCH (2021)

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Article Materials Science, Multidisciplinary

Robustness of helical hinge states of weak second-order topological insulators

C. Wang et al.

Summary: The study investigates the robustness of helical hinge states of three-dimensional weak second-order topological insulators against disorders and reveals that these states remain robust while the quantized conductance is fragile in the presence of weak disorders. As disorder increases, the system undergoes a series of quantum phase transitions, indicating the genuine state of matters in WSOTI phase.

PHYSICAL REVIEW B (2021)

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Article Chemistry, Physical

Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator

Chang Liu et al.

NATURE MATERIALS (2020)

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Article Biochemical Research Methods

SciPy 1.0: fundamental algorithms for scientific computing in Python

Pauli Virtanen et al.

NATURE METHODS (2020)

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Article Physics, Multidisciplinary

Higher-Order Topological Insulators in Quasicrystals

Rui Chen et al.

PHYSICAL REVIEW LETTERS (2020)

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Article Physics, Multidisciplinary

Disorder-induced quantum phase transitions in three-dimensional second-order topological insulators

C. Wang et al.

PHYSICAL REVIEW RESEARCH (2020)

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Article Materials Science, Multidisciplinary

Level statistics of extended states in random non-Hermitian Hamiltonians

C. Wang et al.

PHYSICAL REVIEW B (2020)

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Article Physics, Multidisciplinary

Symmetry-enforced chiral hinge states and surface quantum anomalous Hall effect in the magnetic axion insulator Bi2-xSmxSe3

Changming Yue et al.

NATURE PHYSICS (2019)

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Article Physics, Multidisciplinary

Second-Order Topological Phases in Non-Hermitian Systems

Tao Liu et al.

PHYSICAL REVIEW LETTERS (2019)

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Article Physics, Multidisciplinary

Higher-Order Topological Mott Insulators

Koji Kudo et al.

PHYSICAL REVIEW LETTERS (2019)

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Article Physics, Multidisciplinary

Symmetry and Topology in Non-Hermitian Physics

Kohei Kawabata et al.

PHYSICAL REVIEW X (2019)

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Article Chemistry, Physical

Higher-order topological solitonic insulators

Zhixiong Li et al.

NPJ COMPUTATIONAL MATERIALS (2019)

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Article Physics, Multidisciplinary

Weyl points and Fermi arcs in a chiral phononic crystal

Feng Li et al.

NATURE PHYSICS (2018)

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Article Physics, Multidisciplinary

Higher-Order Topological Insulators and Semimetals on the Breathing Kagome and Pyrochlore Lattices

Motohiko Ezawa

PHYSICAL REVIEW LETTERS (2018)

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Article Multidisciplinary Sciences

Topological insulator laser: Theory

Gal Harari et al.

SCIENCE (2018)

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Article Multidisciplinary Sciences

Topological insulator laser: Experiments

Miguel A. Bandres et al.

SCIENCE (2018)

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Article Multidisciplinary Sciences

Higher-order topological insulators

Frank Schindler et al.

SCIENCE ADVANCES (2018)

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Article Multidisciplinary Sciences

Observation of a phononic quadrupole topological insulator

Marc Serra-Garcia et al.

NATURE (2018)

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Article Physics, Multidisciplinary

Non-Hermitian Chern Bands

Shunyu Yao et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Physics, Multidisciplinary

Antiferromagnetism Emerging in a Ferromagnet with Gain

Huanhuan Yang et al.

PHYSICAL REVIEW LETTERS (2018)

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Article Materials Science, Multidisciplinary

Interplay of wave localization and turbulence in spin Seebeck effect

C. Wang et al.

PHYSICAL REVIEW B (2018)

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Article Materials Science, Multidisciplinary

Hall conductance of a non-Hermitian Chern insulator

Yu Chen et al.

PHYSICAL REVIEW B (2018)

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Article Materials Science, Multidisciplinary

Loss of Hall conductivity quantization in a non-Hermitian quantum anomalous Hall insulator

Timothy M. Philip et al.

PHYSICAL REVIEW B (2018)

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Article Physics, Multidisciplinary

Reflection-Symmetric Second-Order Topological Insulators and Superconductors

Josias Langbehn et al.

PHYSICAL REVIEW LETTERS (2017)

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Article Physics, Multidisciplinary

(d-2)-Dimensional Edge States of Rotation Symmetry Protected Topological States

Zhida Song et al.

PHYSICAL REVIEW LETTERS (2017)

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Article Multidisciplinary Sciences

Quantized electric multipole insulators

Wladimir A. Benalcazar et al.

SCIENCE (2017)

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Article Materials Science, Multidisciplinary

Electric multipole moments, topological multipole moment pumping, and chiral hinge states in crystalline insulators

Wladimir A. Benalcazar et al.

PHYSICAL REVIEW B (2017)

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Article Physics, Multidisciplinary

Effect of Disorder in a Three-Dimensional Layered Chern Insulator

Shang Liu et al.

PHYSICAL REVIEW LETTERS (2016)

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Article Physics, Multidisciplinary

Colloquium: Topological band theory

A. Bansil et al.

REVIEWS OF MODERN PHYSICS (2016)

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Article Physics, Multidisciplinary

Classification of topological quantum matter with symmetries

Ching-Kai Chiu et al.

REVIEWS OF MODERN PHYSICS (2016)

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Article Physics, Multidisciplinary

Anderson Localization and the Quantum Phase Diagram of Three Dimensional Disordered Dirac Semimetals

J. H. Pixley et al.

PHYSICAL REVIEW LETTERS (2015)

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Article Physics, Multidisciplinary

Band of Critical States in Anderson Localization in a Strong Magnetic Field with Random Spin-Orbit Scattering

C. Wang et al.

PHYSICAL REVIEW LETTERS (2015)

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Article Multidisciplinary Sciences

Discovery of a Weyl fermion semimetal and topological Fermi arcs

Su-Yang Xu et al.

SCIENCE (2015)

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Article Multidisciplinary Sciences

Experimental observation of Weyl points

Ling Lu et al.

SCIENCE (2015)

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Article Multidisciplinary Sciences

Observation of phononic helical edge states in a mechanical topological insulator

Roman Suesstrunk et al.

SCIENCE (2015)

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Article Physics, Multidisciplinary

Kwant: a software package for quantum transport

Christoph W. Groth et al.

NEW JOURNAL OF PHYSICS (2014)

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Article Multidisciplinary Sciences

Emergent Space-Time Supersymmetry at the Boundary of a Topological Phase

Tarun Grover et al.

SCIENCE (2014)

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Article Chemistry, Physical

Photonic topological insulators

Alexander B. Khanikaev et al.

NATURE MATERIALS (2013)

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Article Physics, Multidisciplinary

Instability of Walker Propagating Domain Wall in Magnetic Nanowires

B. Hu et al.

PHYSICAL REVIEW LETTERS (2013)

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Article Physics, Multidisciplinary

Surface State Magnetization and Chiral Edge States on Topological Insulators

Fan Zhang et al.

PHYSICAL REVIEW LETTERS (2013)

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Article Multidisciplinary Sciences

Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator

Cui-Zu Chang et al.

SCIENCE (2013)

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Article Physics, Multidisciplinary

Entanglement Spectrum of a Disordered Topological Chern Insulator

Emil Prodan et al.

PHYSICAL REVIEW LETTERS (2010)

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Article Physics, Multidisciplinary

Colloquium: Topological insulators

M. Z. Hasan et al.

REVIEWS OF MODERN PHYSICS (2010)

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Article Physics, Multidisciplinary

Topological Insulator: A New Quantized Spin Hall Resistance Robust to Dephasing

Hua Jiang et al.

PHYSICAL REVIEW LETTERS (2009)

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Article Physics, Multidisciplinary

Time-Reversal-Invariant Topological Superconductors and Superfluids in Two and Three Dimensions

Xiao-Liang Qi et al.

PHYSICAL REVIEW LETTERS (2009)

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Article Physics, Multidisciplinary

Superconducting proximity effect and Majorana fermions at the surface of a topological insulator

Liang Fu et al.

PHYSICAL REVIEW LETTERS (2008)

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Article Multidisciplinary Sciences

Quantum spin hall insulator state in HgTe quantum wells

Markus Koenig et al.

SCIENCE (2007)

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Article Multidisciplinary Sciences

Quantum spin Hall effect and topological phase transition in HgTe quantum wells

B. Andrei Bernevig et al.

SCIENCE (2006)

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Article Physics, Multidisciplinary

Z2 topological order and the quantum spin Hall effect -: art. no. 146802

CL Kane et al.

PHYSICAL REVIEW LETTERS (2005)

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Chiral hinge transport in disordered non-Hermitian second-order topological insulators

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