Discovery Principles and Materials for Symmetry-Protected Persistent Spin Textures with Long Spin Lifetimes

Lu, Xiaochen; Rondinelli, James M.

doi:10.1016/j.matt.2020.08.028

Cited by 22 publications

(8 citation statements)

References 40 publications

(44 reference statements)

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“…The most prominent electronic feature of the (MA) 2 Pb(SCN) 2 I 2 monolayer is the significant splitting of both valence and conduction band edges along the Γ– Y reciprocal direction, while band splitting is absent along the other planar Γ– Z direction. Such reciprocal direction dependent band splitting originates from the unique spin–orbit field 44,45 within the system.…”

Section: Resultsmentioning

confidence: 99%

“…50,52,53 The presence of unidirectional electron momentumspin coupling (k y Ás x ) can further lead to the unique PSH state in the (MA) 2 Pb(SCN) 2 I 2 monolayer. 44,45,51 In order to make the unidirectional character associated with the PSH state more obvious, we simulate spin texture for the outer valence and conduction band branches in the 2D Brillouin zone. As shown in Fig.…”

Section: Polarization Controllable Persistent Spin Helixmentioning

confidence: 99%

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Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer

Zhao

Gou

et al. 2022

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Section: Polarization Controllable Persistent Spin Helixmentioning

confidence: 99%

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer

Zhao

Gou

et al. 2022

J. Mater. Chem. C

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“…[459] Based on theoretical calculations, materials like BiInO 3 and various A 3 B 2 O 7 have been put forth as potential candidates. [364,460,461] The challenge, however, is to make these insulating oxides electrically (semi)conducting with suitable chemical doping to characterize the spin texture. Such studies can further explore the coupling between spin, orbital, and lattice degrees of freedoms in ferroelectrics, leading to nonvolatile spintronic devices like a spin-field-effect transistor.…”

Section: Exotic Dipolar Textures and Emergent Phenomenamentioning

confidence: 99%

Thin‐Film Ferroelectrics

et al. 2022

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non-centrosymmetric structures which can possess a spontaneous electric polarization which can be controlled using applied electric fields (Figure 1). Ferroelectrics themselves are inherently hierarchical materials-wherein picometer ionic displacements give rise to polarization which can collectively extend over millimeters or self-organize into complex mesoscopic structures or collectively reorient under applied stimuli (e.g., electric fields, temperature, or stress). Understanding these complex behaviors necessitates a multilevel approach, wherein atomistic, microscopic, mesoscopic, and macroscopic properties are studied in concert. Parallel advances in synthesis, characterization, and simulation have enabled such multimodal studies and provided a methodology through which a multitude of ferroelectric functionalities can now be achieved and studied.The promise of utilizing these functionalities in a number of applications kick-started the modern era of ferroelectric research in the mid-20th century. [1] Looking further back, in the 1920s, the ability to switch the polarization of sodium potassium tartrate tetrahydrate (commonly known as Rochelle salt) was first observed, along with dielectric and piezoelectric anomalies near the ferroelectric transition-now called the Curie point. In the 1940s, as part of the accelerated research push associated with World War II, ferroelectric BaTiO 3 was discovered by accident. When modifying TiO 2 with BaO to enhance its dielectric properties, a record-high dielectric permittivity was discovered and subsequent studies demonstrated a hysteretic switchable polarization. This discovery ushered in a new understanding of ferroelectricity as more than a rare phenomenon associated with salts that contained hydrogen bonding, but rather as a phenomenon that could exist in simple oxides like perovskites. Over the subsequent decades, the number of ferroelectric compositions exploded, particularly within the perovskite oxides, introducing new chemistries including LiNbO 3 and the PbZr x Ti 1−x O 3 system. Meanwhile, theoretical descriptions of ferroelectricity were advanced through lattice-dynamical models invoking a soft-mode optical phonon. Studies of the piezoelectric, thermodynamic, and optical properties in ferroelectric ceramics allowed for their deployment in a number of applications including piezoelectric sensors and pyroelectric infrared detectors. By the 1960s, increased interest in using ferroelectric polarization for nonvolatile memory was driving research into Over the last 30 years, the study of ferroelectric oxides has been revolutionized by the implementation of epitaxial-thin-film-based studies, which have driven many advances in the understanding of ferroelectric physics and the realization of novel polar structures and functionalities. New questions have motivated the development of advanced synthesis, characterization, and simulations of epitaxial thin films and, in turn, have provided new insights and applications across the micro-, meso-, and macroscopic length sc...

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“…[9,14] Specifically, the presence of mirror symmetry in the Cmc2 1 space group would endow symmetry-protected PST around high symmetry points. [15] Such PST is naturally executed by crystal symmetry but does not require a delicate balance between the Rashba and Dresselhaus contributions. When the temper-…”

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confidence: 99%

Electrically Switchable Persistent Spin Texture in a Two‐Dimensional Hybrid Perovskite Ferroelectric

Guo

et al. 2023

Angewandte Chemie

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As a momentum‐independent spin configuration, persistent spin texture (PST) could avoid spin relaxation and play an advantageous role in spin lifetime. Nevertheless, manipulation of PST is a challenge due to the limited materials and ambiguous structure–property relationships. Herein, we present electrically switchable PST in a new 2D perovskite ferroelectric, (PA)2CsPb2Br7 (where PA is n‐pentylammonium), which has a high Curie temperature of 349 K, evident spontaneous polarization (3.2 μC cm−2) and a low coercive electric field of 5.3 kV cm−1. The combination of symmetry‐breaking in ferroelectrics and effective spin‐orbit field facilitates intrinsic PST in the bulk and monolayer structure models. Strikingly, the directions of spin texture are reversible by switching the spontaneous electric polarization. This electric switching behavior relates to the tilting of PbBr6 octahedra and the reorientation of organic PA+ cations. Our studies on ferroelectric PST of 2D hybrid perovskites afford a platform for electrical spin texture manipulation.

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Discovery Principles and Materials for Symmetry-Protected Persistent Spin Textures with Long Spin Lifetimes

Cited by 22 publications

References 40 publications

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer

Thin‐Film Ferroelectrics

Electrically Switchable Persistent Spin Texture in a Two‐Dimensional Hybrid Perovskite Ferroelectric

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Discovery Principles and Materials for Symmetry-Protected Persistent Spin Textures with Long Spin Lifetimes

Cited by 22 publications

References 40 publications

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)2Pb(SCN)2I2 monolayer

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)2Pb(SCN)2I2 monolayer

Thin‐Film Ferroelectrics

Electrically Switchable Persistent Spin Texture in a Two‐Dimensional Hybrid Perovskite Ferroelectric

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Product

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Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer

Optical generation and electric control of pure spin photocurrent in a ferroelectric Ruddlesden–Popper perovskite (MA)₂Pb(SCN)₂I₂ monolayer