Coherent control over three-dimensional spin polarization for the spin-orbit coupled surface state of Bi${}_2$Se${}_3$

Abstract

Interference of spin-up and spin-down eigenstates depicts spin rotation of electrons, which is a fundamental concept of quantum mechanics and accepts technological challenges for the electrical spin manipulation. Here, we visualize this coherent spin physics through laser spin- and angle-resolved photoemission spectroscopy on a spin-orbital entangled surface-state of a topological insulator. It is unambiguously revealed that the linearly polarized laser can simultaneously excite spin-up and spin-down states and these quantum spin-basis are coherently superposed in photoelectron states. The superposition and the resulting spin rotation is arbitrary manipulated by the direction of the laser field. Moreover, the full observation of the spin rotation displays the phase of the quantum states. This presents a new facet of laser-photoemission technique for investigation of quantum spin physics opening new possibilities in the field of quantum spintronic applications.

References in corpus (21)

• Topological Insulators
• Discovery (theoretical prediction and experimental observation) of a large-gap topological-insulator class with spin-polarized single-Dirac-cone on the surface
• First observation of Spin-Momentum Helical Locking in Bi2Se3 and Bi2Te3, demonstration of Topological-Order at 300K and a realization of topological-transport-regime
• Topological Insulator Materials
• Coherent control of a single electron spin with electric fields
• Spin Polarization and Transport of Surface States in the Topological Insulators Bi2Se3 and Bi2Te3 from First Principles
• Electronic Structure of the Topological Insulator Bi2Se3 Using Angle-Resolved Photoemission Spectroscopy: Evidence for a Nearly Full Surface Spin Polarization
• Direct Measurement of the Out-of-Plane Spin Texture in the Dirac Cone Surface State of a Topological Insulator
• Photoelectron spin-flipping and texture manipulation in a topological insulator
• In-Plane Orbital Texture Switch at the Dirac Point in the Topological Insulator Bi2Se3
• Spin-orbital Texture in Topological Insulators
• Layer-by-layer entangled spin-orbital texture of the topological surface state in Bi2Se3
• Spin Polarization of Photoelectrons from Topological Insulators
• Photoelectron spin-polarization-control in the topological insulator Bi2Se3
• Topological Surface States with Persistent High Spin Polarization across Dirac Point in Bi${}_2$Te${}_2$Se and Bi${}_2$Se${}_2$Te
• Photoemission of Bi${}_2$Se${}_3$ with Circularly Polarized Light: Probe of Spin Polarization or Means for Spin Manipulation?
• Orbital-Selective Spin Texture and its Manipulation in a Topological Insulator
• High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light
• Hybrid solid state qubits: the powerful role of electron spins
• Common Origin of the Circular-dichroism Pattern in ARPES of SrTiO3 and CuxBi2Se3
• Spin-conserving and reversing photoemission from the surface states of Bi${}_2$Se${}_3$ and Au (111)

Cited by in corpus (15)

• Rashba spin splitting of L-gap surface states on Ag(111) and Cu(111)
• Ultrafast Energy- and Momentum-resolved Surface Dirac Photocurrents in the Topological Insulator Sb${}_2$Te${}_3$
• Direct Mapping of Spin and Orbital Entangled Wavefunction under Interband Spin-Orbit coupling of Rashba Spin-Split Surface States
• Spin- and angle-resolved photoemission on topological materials
• The topological surface state of $\alpha$-Sn on InSb(001) as studied by photoemission
• Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser
• Visualization of spin-polarized electronic states by imaging-type spin-resolved photoemission microscopy
• Determination of the time scale of photoemission from the measurement of spin polarization
• Observation of spin splitting in the surface electronic structure of antiferromagnet NdBi
• Momentum-dependent spin selection rule in photoemission with glide symmetry
• Spin-polarized quasi 1D state with finite bandgap on the Bi/InSb(001) surface
• The electronic structure of Mn${}_{1-x}$Pb${}_x$Bi${}_2$Te${}_4$: experimental evidence of topological phase transition
• Visualization of optical polarization transfer to photoelectron spin vector emitted from the spin-orbit coupled surface state
• Optical study on electronic structure of the locally non-centrosymmetric CeRh${}_2$As${}_2$
• Fluctuated spin-orbital texture of Rashba-split surface states in real and reciprocal space