1.1k citations · 3k across the 32 of their papers we have counts for
12 papers · 1 filter
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…
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…
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…
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…
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…
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…
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…