278 citations · 2.1k across the 35 of their papers we have counts for
35 papers
Large Jahn-Teller shifts and splittings observed in halide perovskite CsPbBr3
Maryam Sajedi, Maxim Krivenkov, Dmitry Marchenko +7
Despite the fundamental role of Jahn-Teller effects of first and second order in shaping structural and electronic properties, there is hardly any observation in angle-resolved pho…
Charge transfer and Spin-Valley locking in 4Hb-TaS
Avior Almoalem, Roni Gofman, Yuval Nitzav +12
4Hb-TaS is a superconductor that exhibits unique characteristics such as time-reversal symmetry breaking, hidden magnetic memory, and topological edge modes. It is a naturally…
Temperature Dependence of Relativistic Valence Band Splitting Induced by an Altermagnetic Phase Transition
M. Hajlaoui, S. W. D'Souza, L. Šmejkal +13
Altermagnetic (AM) materials exhibit non-relativistic, momentum-dependent spin-split states, ushering in new opportunities for spin electronic devices. While the characteristics of…
Magnetic Dirac semimetal state of (Mn,Ge)BiTe
Alexander S. Frolov, Dmitry Yu. Usachov, Artem V. Tarasov +13
For quantum electronics, the possibility to finely tune the properties of magnetic topological insulators (TIs) is a key issue. We studied solid solutions between two isostructural…
Coexistence of bulk-nodal and surface-nodeless Cooper pairings in a superconducting Dirac semimetal
Xian P. Yang, Yigui Zhong, Sougata Mardanya +21
The interplay of nontrivial topology and superconductivity in condensed matter physics gives rise to exotic phenomena. However, materials are extremely rare where it is possible to…
Hidden spin-orbital texture at the -located valence band maximum of a transition metal dichalcogenide semiconductor
Oliver J. Clark, Oliver Dowinton, Mohammad Saeed Bahramy +1
Finding stimuli capable of driving an imbalance of spin-polarised electrons within a solid is the central challenge in the development of spintronic devices. However, without the a…
Emergence of Fermi arcs and novel magnetic splitting in an antiferromagnet
Benjamin Schrunk, Yevhen Kushnirenko, Brinda Kuthanazhi +14
The Fermi arcs are signatures of exotic states in solids because they defy conventional concept of Fermi surfaces as closed contours in momentum space. Fermi arcs were first discov…
Is there a polaron signature in angle-resolved photoemission of CsPbBr3?
Maryam Sajedi, Maxim Krivenkov, Dmitry Marchenko +7
The formation of large polarons has been proposed as reason for the high defect tolerance, low mobility, low charge carrier trapping and low nonradiative recombination rates of lea…
Lifetime of quasi-particles in the nearly-free electron metal Sodium
D. V. Potorochin, R. Kurleto, O. J. Clark +8
We report a high-resolution angle-resolved photoemission (ARPES) study of the prototypical nearly-free-electron metal sodium. The observed mass enhancement is slightly smaller than…
Fermi surface tomography
Sergey Borisenko, Alexander Fedorov, Andrii Kuibarov +19
Fermi surfaces, three-dimensional (3D) abstract interfaces that define the occupied energies of electrons in a solid, are important for characterizing and predicting the thermal, e…
Mn-rich MnSb2Te4: A topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K
S. Wimmer, J. Sánchez-Barriga, P. Küppers +18
Ferromagnetic topological insulators exhibit the quantum anomalous Hall effect that might be used for high precision metrology and edge channel spintronics. In conjunction with sup…
Large magnetic gap at the Dirac point in a Mn-induced BiTe heterostructure
E. D. L. Rienks, S. Wimmer, P. S. Mandal +15
Magnetically doped topological insulators enable the quantum anomalous Hall effect (QAHE) which provides quantized edge states for lossless charge transport applications. The edge…
Anomalous behavior of the electronic structure of (BiIn)Se across the quantum-phase transition from topological to trivial insulator
J. Sánchez-Barriga, I. Aguilera, L. V. Yashina +9
Using spin- and angle-resolved spectroscopy and relativistic many-body calculations, we investigate the evolution of the electronic structure of (BiIn)Se bulk s…
Strong spin dependence of correlation effects in Ni due to Stoner excitations
J. Sánchez-Barriga, R. Ovsyannikov, J. Fink
Using high-resolution angle-resolved photoemission, we observe a strong spin-dependent renormalization and lifetime broadening of the quasiparticle excitations in the electronic ba…
Band renormalization of blue phosphorus on Au(111)
E. Golias, M. Krivenkov, A. Varykhalov +2
Most recently, theoretical calculations predicted the stability of a novel two-dimensional phosphorus honeycomb lattice named blue phosphorus. Here, we report on the growth of blue…
High-temperature quantum oscillations of the Hall resistance in bulk BiSe
Marco Busch, Olivio Chiatti, Sergio Pezzini +5
Helically spin-polarized Dirac fermions (HSDF) in protected topological surface states (TSS) are of high interest as a new state of quantum matter. In three-dimensional (3D) materi…
Suppression of electron scattering resonances in graphene by quantum dots
M. Krivenkov, D. Marchenko, J. Sánchez-Barriga +2
Transmission of low-energetic electrons through two-dimensional materials leads to unique scattering resonances. These resonances contribute to photoemission from occupied bands wh…
Laser-induced persistent photovoltage on the surface of a ternary topological insulator at room temperature
J. Sánchez-Barriga, M. Battiato, E. Golias +4
Using time- and angle-resolved photoemission, we investigate the ultrafast response of excited electrons in the ternary topological insulator (BiSb)Te to fs-i…
Sub-picosecond spin dynamics of excited states in the topological insulator BiTe
J. Sánchez-Barriga, M. Battiato, M. Krivenkov +9
Using time-, spin- and angle-resolved photoemission, we investigate the ultrafast spin dynamics of hot electrons on the surface of the topological insulator BiTe following…
Negative longitudinal magnetoresistance from anomalous N=0 Landau level in topological materials
B. A. Assaf, T. Phuphachong, E. Kampert +8
Negative longitudinal magnetoresistance (NLMR) is shown to occur in topological materials in the extreme quantum limit, when a magnetic field is applied parallel to the excitation…
Surface Fermi arc connectivity in the type-II Weyl semimetal candidate WTe
J. Sánchez-Barriga, M. G. Vergniory, D. Evtushinsky +4
We perform ultrahigh resolution angle-resolved photoemission experiments at a temperature T=0.8 K on the type-II Weyl semimetal candidate WTe. We find a surface Fermi arc con…
Nonmagnetic band gap at the Dirac point of the magnetic topological insulator (BiMnSe
J. Sánchez-Barriga, A. Varykhalov, G. Springholz +17
Magnetic doping is expected to open a band gap at the Dirac point of topological insulators by breaking time-reversal symmetry and to enable novel topological phases. Epitaxial (Bi…
Absence of Giant Spin Splitting in the Two-Dimensional Electron Liquid at the Surface of SrTiO (001)
S. McKeown Walker, S Riccò, F. Y. Bruno +10
We reinvestigate the putative giant spin splitting at the surface of SrTiO reported by Santander-Syro [Nature Mat. 13, 1085 (2014)]. Our spin- and angle-resolved photo…
2D layered transport properties from topological insulator BiSe single crystals and micro flakes
Olivio Chiatti, Christian Riha, Dominic Lawrenz +9
Low-field magnetotransport measurements of topological insulators such as BiSe are important for revealing the nature of topological surface states by quantum corrections t…