1.1k citations · 3k across the 32 of their papers we have counts for
32 papers
Tightly-bound and room-temperature-stable excitons in van der Waals degenerate-semiconductor Bi4O4SeCl2 with high charge-carrier density
Yueshan Xu, Junjie Wang, Bo Su +9
Excitons, which represent a type of quasi-particles consisting of electron-hole pairs bound by the mutual Coulomb interaction, were often observed in lowly-doped semiconductors or…
Tailoring Dirac fermions by in-situ tunable high-order moire pattern in graphene-monolayer xenon heterostructure
Chunlong Wu, Qiang Wan, Cao Peng +8
A variety of novel quantum phases have been achieved in twist bilayer graphene (tBLG) and other moire superlattices recently, including correlated insulators, superconductivity, ma…
Inherited Weak Topological Insulator Signatures in Topological Hourglass Semimetal Nb3XTe6 (X = Si, Ge)
Q. Wan, T. Y. Yang, S. Li +17
Using spin-resolved and angle-resolved photoemission spectroscopy and first-principles calculations, we have identified bulk band inversion and spin polarized surface state evolved…
Observation of multi Dirac fermion cloning induced by moiré potential in graphene-SiC heterostructure
C. L. Wu, Q. Wan, C. Peng +6
We reexamine the electronic structure of graphene on SiC substrate by angle-resolved photoemission spectroscopy. We directly observed multiply cloning of Dirac cone, in addition to…
Directional massless Dirac fermions in a layered van der Waals material with one-dimensional long-range order
T. Y. Yang, Q. Wan, D. Y. Yan +13
Exotic properties in single or few layers of van der Waals materials carry great promise for applications in nanoscaled electronics, optoelectronics and flexible devices. The estab…
Decoupling of Lattice and Orbital Degrees of Freedom in an Iron-Pnictide Superconductor
Christian E. Matt, O. Ivashko, M. Horio +16
The interplay of structural and electronic phases in iron-based superconductors is a central theme in the search for the superconducting pairing mechanism. While electronic nematic…
Switchable Weyl nodes in topological Kagome ferromagnet Fe3Sn2
M. Yao, H. Lee, N. Xu +7
The control of topological quantum materials is the prerequisite for novel devices exploiting these materials. Here we propose that the room temperature ferromagnet Fe3Sn2, whose f…
Evidence of Coulomb interaction induced Lifshitz transition and robust hybrid Weyl semimetal in Td MoTe2
N. Xu, Z. W. Wang, A. Magrez +13
Using soft x-ray angle-resolved photoemission spectroscopy we probed the bulk electronic structure of Td MoTe2. We found that on-site Coulomb interaction leads to a Lifshitz transi…
Spin-resolved electronic response to the phase transition in MoTe
Andrew P. Weber, Philipp Rüßmann, Nan Xu +10
The semimetal MoTe is studied by spin- and angle- resolved photoemission spectroscopy to probe the detailed electronic structure underlying its broad range of response behavior…
Trivial topological phase of CaAgP and the topological nodal-line transition in CaAg(P1-xAsx)
N. Xu, Y. T. Qian, Q. S. Wu +14
By performing angle-resolved photoemission spectroscopy and first-principles calculations, we address the topological phase of CaAgP and investigate the topological phase transitio…
Universal response of the type-II Weyl semimetals phase diagram
P. Rüßmann, A. P. Weber, F. Glott +11
The discovery of Weyl semimetals represents a significant advance in topological band theory. They paradigmatically enlarged the classification of topological materials to gapless…
Extremely high magnetoresistance and conductivity in the type-II Weyl semimetals WP2 and MoP2
Nitesh Kumar, Yan Sun, Nan Xu +12
The peculiar band structure of semimetals exhibiting Dirac and Weyl crossings can lead to spectacular electronic properties such as large mobilities accompanied by extremely high m…
Distinct evolutions of Weyl fermion quasiparticles and Fermi arcs with bulk band topology in Weyl semimetals
N. Xu, G. Autes, C. E. Matt +14
The Weyl semimetal phase is a recently discovered topological quantum state of matter characterized by the presence of topologically protected degeneracies near the Fermi level. Th…
ARPES observation of Mn-pnictide hybridization and negligible band structure renormalization in BaMnAs and BaMnSb
W. -L. Zhang, P. Richard, A. van Roekeghem +14
We performed an angle-resolved photoemission spectroscopy study of BaMnAs and BaMnSb, which are isostructural to the parent compound BaFeAs of the 122 famil…
Spin- and angle-resolved photoemission on the topological Kondo Insulator candidate: SmB6
N. Xu, H. Ding, M. Shi
Topological Kondo insulators are a new class of topological insulators in which metallic surface states protected by topological invariants reside in the bulk band gap at low tempe…
NaFeCuAs: A pnictide insulating phase induced by on-site Coulomb interaction
C. E. Matt, N. Xu, B. Q. Lv +13
In the studies of iron-pnictides, a key question is whether their bad-metal state from which the superconductivity emerges lies in close proximity with a magnetically ordered insul…
Discovery of Weyl semimetal state violating Lorentz invariance in MoTe2
N. Xu, Z. J. Wang, A. P. Weber +16
A new type of Weyl semimetal state, in which the energy values of Weyl nodes are not the local extrema, has been theoretically proposed recently, namely type II Weyl semimetal. Dis…
High-temperature superconductivity from fine-tuning of Fermi-surface singularities in iron oxypnictides
A. Charnukha, D. V. Evtushinsky, C. E. Matt +6
In the family of the iron-based superconductors, the FeAsO-type compounds (with being a rare-earth metal) exhibit the highest bulk superconducting transition temperatures…
Observation of Fermi arc spin texture in TaAs
B. Q. Lv, S. Muff, T. Qian +15
We have investigated the spin texture of surface Fermi arcs in the recently discovered Weyl semimetal TaAs using spin- and angle-resolved photoemission spectroscopy. The experiment…
Observation of Weyl nodes and Fermi arcs in TaP
N. Xu, H. M. Weng, B. Q. Lv +18
A Weyl semimetal possesses spin-polarized band-crossings, called Weyl nodes, connected by topological surface arcs. The low-energy excitations near the crossing points behave the s…
Tuning the metal-insulator transition in NdNiO3 heterostructures via Fermi surface instability and spin-fluctuations
R. S. Dhaka, Tanmoy Das, N. C. Plumb +11
We employed {\it in-situ} pulsed laser deposition (PLD) and angle-resolved photoemission spectroscopy (ARPES) to investigate the mechanism of the metal-insulator transition (MIT) i…
Dirac states with knobs on: interplay of external parameters and the surface electronic properties of 3D topological insulators
Emmanouil Frantzeskakis, Nick de Jong, Berend Zwartsenberg +19
Topological insulators are a novel materials platform with high applications potential in fields ranging from spintronics to quantum computation. In the ongoing scientific effort t…
Observation of Weyl nodes in TaAs
B. Q. Lv, N. Xu, H. M. Weng +14
In 1929, H. Weyl proposed that the massless solution of Dirac equation represents a pair of new type particles, the so-called Weyl fermions [1]. However the existence of them in pa…
Exotic Kondo crossover in a wide temperature region in the topological Kondo insulator SmB6 revealed by high-resolution ARPES
N. Xu, C. E. Matt, E. Pomjakushina +12
Temperature dependence of the electronic structure of SmB6 is studied by high-resolution ARPES down to 1 K. We demonstrate that there is no essential difference for the dispersions…