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We present a detailed electronic structure study of the non-centrosymmetric superconductor BiPd based on our angle resolved photoemission spectroscopy (ARPES) measurements and Density Functional Theory (DFT) based calculations. We observe a…

Superconductivity · Physics 2023-10-31 H. Lohani , P. Mishra , Anurag Gupta , V. P. S. Awana , B. R. Sekhar

Most superconducting mechanisms pair electrons within the same band, forming spin singlets. However, the discovery of multi-band superconductivity has opened new scenarios for pairing, particularly in systems with strong spin-orbit…

The implications of the angle-resolved photoemission spectroscopy (ARPES) on the issue of spin-charge separation are discussed from the viewpoint of slave-particle RVB theories. It is pointed out that the non-local phase string is essential…

Strongly Correlated Electrons · Physics 2009-10-30 Hidekatsu Suzuura , Naoto Nagaosa

We investigate the influence of spin-orbit coupling in a non-centrosymmetric superconductor on its ground state properties near a surface. We determine the spectrum of Andreev bound states due to surface-induced mixing of bands with…

Superconductivity · Physics 2008-10-31 A. B. Vorontsov , I. Vekhter , M. Eschrig

We demonstrate the induction of a giant Rashba-type spin-splitting on a semiconducting substrate by means of a Bi trimer adlayer on a Si(111) wafer. The in-plane inversion symmetry is broken so that the in-plane potential gradient induces a…

Materials Science · Physics 2009-10-01 I. Gierz , T. Suzuki , E. Frantzeskakis , S. Pons , S. Ostanin , A. Ernst , J. Henk , M. Grioni , K. Kern , C. R. Ast

We present a new model for the study of spin-orbit coupling in interacting quasi-one-dimensional systems and solve it exactly to find the spectral properties of such systems. We show that the combination of spin-orbit coupling and…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 A. V. Moroz , K. V. Samokhin , C. H. W. Barnes

A comprehensive mapping of the spin polarization of the electronic bands in ferroelectric a-GeTe(111) films has been performed using a time-of-flight momentum microscope equipped with an imaging spin filter that enables a simultaneous…

The control of the electron spin by external means is a key issue for spintronic devices. Using spin- and angle-resolved photoemission spectroscopy (SARPES) with three-dimensional spin detection, we demonstrate operando electrostatic spin…

The electronic band structure and Fermi surface of ZrTe_3 was precisely determined by linearly polarized angle-resolved photoelectron spectroscopy. Several bands and a large part of the Fermi surface are found to be split by 100-200 meV…

Strongly Correlated Electrons · Physics 2015-05-13 Moritz Hoesch , Xiaoyu Cui , Kenya Shimada , Corsin Battaglia , Shin-ichi Fujimori , Helmuth Berger

The semimetal MoTe$_2$ is studied by spin- and angle- resolved photoemission spectroscopy to probe the detailed electronic structure underlying its broad range of response behavior. A novel spin-texture is uncovered in the bulk Fermi…

Quantum wires with spin-orbit coupling provide a unique opportunity to simultaneously control the coupling strength and the screened Coulomb interactions where new exotic phases of matter can be explored. Here we report on the observation…

Strongly Correlated Electrons · Physics 2015-09-21 C. Brand , H. Pfnür , G. Landolt , S. Muff , J. H. Dil , Tanmoy Das , C. Tegenkamp

High resolution angle resolved photoemission data from Pb doped Bi_2Sr_2CaCu_2O_8 (Bi2212) with suppressed superstructure is presented. Improved resolution and very high momentum space sampling at various photon energies reveal the presence…

Strongly Correlated Electrons · Physics 2009-10-31 P. V. Bogdanov , A. Lanzara , X. J. Zhou , S. A. Kellar , D. L. Feng , E. D. Lu , J. -I. Shimoyama , K. Kishio , Z. Hussain , Z. X. Shen

We performed density functional calculations for ultra-thin bismuth surface alloys: surface alloys of bismuth and face-centered cubic metals Bi/$M$(111)-$(\sqrt{3}\times\sqrt{3})R30\deg$ ($M$=Cu, Ag, Au, Ni, Co, and Fe). Our calculated…

Materials Science · Physics 2017-11-10 Naoya Yamaguchi , Hiroki Kotaka , Fumiyuki Ishii

Angle-resolved photoemission spectroscopy (ARPES) is used to study the band dispersion and the quasiparticle scattering rates in two ferropnictides systems. Our ARPES results show linear-in-energy dependent scattering rates which are…

We study attractively interacting fermions on a square lattice with dispersion relations exhibiting strong spin-dependent anisotropy. The resulting Fermi surface mismatch suppresses the s-wave BCS-type instability, clearing the way for…

We propose and formulate an interaction induced staggered spin-orbit order as a new emergent phase of two-dimensional Fermi gases. We show that when some form of inherent spin-splitting via Rashba-type spin-orbit coupling renders two…

Strongly Correlated Electrons · Physics 2013-01-30 Tanmoy Das

Altermagnetism represents an emergent collinear magnetic phase with compensated order and an unconventional alternating even-parity wave spin order in the non-relativistic band structure. We investigate directly this unconventional band…

Lack of inversion symmetry in metals breaks SU(2) symmetry which results in spin-splitting of the electronic states at the Fermi level due to various types of spin-orbit coupling (SOC) such as Dresselhaus, Rashba, or Ising (also called…

Mesoscale and Nanoscale Physics · Physics 2026-04-02 Mojdeh Saleh , Saurabh Maiti

We present a comprehensive investigation into the atomic and electronic structures of a single-layer Sb(110) rhombohedral crystal formed on an Au(111) substrate. Low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM)…

Materials Science · Physics 2024-07-01 Jinbang Hu , Lina Liu , Xiansi Wang , Yong P. Chen , Justin W Wells

We report high-resolution spin-resolved photoemission spectroscopy (Spin-ARPES) measurements on the parent compound Sb of the first discovered 3D topological insulator Bi{1-x}Sb{x} [D. Hsieh et al., Nature 452, 970 (2008) Submitted 2007].…

Mesoscale and Nanoscale Physics · Physics 2011-03-18 D. Hsieh , Y. Xia , L. Wray , D. Qian , J. H. Dil , F. Meier , L. Patthey , J. Osterwalder , G. Bihlmayer , Y. S. Hor , R. J. Cava , M. Z. Hasan