Chirality-Induced Spin-Polarized State of a Chiral Crystal 
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Inui, Akito; Aoki, Ryuya; Nishiue, Yuki; Shiota, Kohei; Kousaka, Yusuke; Shishido, Hiroaki; Hirobe, Daichi; Suda, Masayuki; Ohe, Jun–ichiro; Kishine, Jun‐ichiro; Yamamoto, Hiroshi; Togawa, Yoshihiko

doi:10.1103/physrevlett.124.166602

Cited by 130 publications

(83 citation statements)

References 27 publications

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“… 1 It can open up new avenues for chiral chemistry and can bring chiral (molecular) structures into electronic and spintronic applications. This is enabled by the chirality-induced spin selectivity (CISS) effect, 2 − 4 which describes the generation of a collinear spin current by a charge current through a chiral component (single molecule, assembly of molecules, or solid-state system). In two-terminal (2T) electronic nanodevices that contain a chiral component and a single ferromagnet (FM), CISS is reported as a change of electrical resistance upon magnetization reversal.…”

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confidence: 99%

Detecting Chirality in Two-Terminal Electronic Nanodevices

2020

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Central to spintronics is the interconversion between electronic charge and spin currents, and this can arise from the chirality-induced spin selectivity (CISS) effect. CISS is often studied as magnetoresistance (MR) in two-terminal (2T) electronic nanodevices containing a chiral (molecular) component and a ferromagnet. However, fundamental understanding of when and how this MR can occur is lacking. Here, we uncover an elementary mechanism that generates such an MR for nonlinear response. It requires energy-dependent transport and energy relaxation within the device. The sign of the MR depends on chirality, charge carrier type, and bias direction. Additionally, we reveal how CISS can be detected in the linear response regime in magnet-free 2T nanodevices, either by forming a chirality-based spin-valve using two or more chiral components or by Hanle spin precession in devices with a single chiral component. Our results provide operation principles and design guidelines for chirality-based spintronic nanodevices and technologies.

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confidence: 99%

Detecting Chirality in Two-Terminal Electronic Nanodevices

2020

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“…We try to understand our observation based on the comparison with the previously known two magnetochiral phenomena: (A) current-induced magnetization in bulk chiral crystal 13,19 and (B) spin-polarization in photoelectron transmission of chiral molecules 5,6 . First, our result has a similarity with (A) in the sense that the material has chirality in bulk structure but is different from (A) since our measurement detects atomic local regions.…”

Section: Inverse Magnetochiral Effectmentioning

confidence: 95%

“…Specifically, there still lacks any detailed investigation of the magnetochiral interaction at the atomic level where quantum mechanical tweak often acts in a counter-intuitive way. Moreover, whether the magnetochiral interaction can be associated with local probing techniques such as STM is a crucial question 19 that might provide superior spatial resolution compared to the existing bulk optical or transport techniques in chirality studies [20][21][22] . However, it is highly unclear how the accumulated effect in bulk contributes to the surface measurement with an atomic spatialresolution, or even whether the spin-polarization induced by the magnetochiral interaction is a quantity that can be detected with SP-STM.…”

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confidence: 99%

“…Moreover, Cr1/3NbS2 (isostructural to Co1/3NbS2) has been reported to show magnetochiral interactions in a bulk transport setup, i.e. chirality-induced spin transport 19 and anomalous nonreciprocal electrical transport 28 . Specifically, Co1/3NbS2, compared with Cr1/3NbS2, is advantageous since it shows paramagnetic magnetism at temperatures above the antiferromagnetic transition temperature of ~26 K 29 , thus we can eliminate the influence of magnetic ordering at the liquid nitrogen temperature and test solely the intrinsic magnetochiral effect.…”

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confidence: 99%

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Magnetochiral Spin-Polarized Tunneling in a Paramagnetic State

Lim¹,

Huang²,

Pan³

et al. 2020

Preprint

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Crystallographic chirality can mediate various optical and electrical magnetochiral effects. Since these effects have been studied in bulk optical, transport or non-local probe setups, investigation with a local probe is necessarily the next step towards further understanding of the intriguing phenomena closer to the quantum regime. We observed a spin-polarized scanning tunneling microscopy (SP-STM) contrast in the chiral domains of Co1/3NbS2 in a paramagnetic state, which is unexpected in the conventional SP-STM mechanism. This spin-polarized tunneling, depending on the local structural chirality, is argued to be an inverse magnetochiral effect due to a dynamic coupling between tunneling electrons and chirality. In addition, using the standard STM, we also find magnetochiral nonreciprocal tunneling in the presence of external magnetic fields, considered as the inverse process. Our results demonstrate a new application of SP-STM in detecting the dynamic interaction of tunneling electrons with broken crystallographic symmetries.

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“…Other examples of asymmetric materials include the field of multiferroics. Chirality induced spin selectivity (CISS) has also become an emerging field of chiral spin-related phenomena, which has great potential for new spin current properties 22 and chemical reaction control involving radical reactions. 23 As we have seen above, chiral material properties are an area that has been left behind in the long history of science, and as chirality itself is scale-free and ubiquitous, we expect to see more and more new research in this field.…”

Section: Conclusion and Future Perspectivementioning

confidence: 99%

Chiral Magnetism: Coupling Static and Dynamic Chirality

Inoue

2021

Chemistry Letters

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The synthesis, structure, magnetic properties and magnetic structure of two molecular chiral magnets and one inorganic chiral magnet are presented. In magnetic crystals belonging to the Sohncke group, which includes the chiral group, the chiral non-collinear spin structure is achieved through Dzyaloshinsky-Moriya interactions in addition to the usual exchange spin interactions and dipole-dipole spin interactions. Experimentally, a chiral helical magnetic (CHM) structure is observed as the ground state in most of this category of uniaxial chiral magnets as a non-collinear spin structure. CHM structure transforms into a chiral spin soliton (CS) magnetic structure in a magnetic field. The (CS) magnetic structure forms a chiral spin soliton lattice (CSL) magnetic structure when the nearest neighbor magnetic interaction is ferromagnetic. Since the CHM and CSL magnetic structures are topologically protected, they are not affected by defects and are therefore extremely stable. A series of studies have revealed that the chiral magnetic structure is perfectly coupled to the non-symmetric crystal structure. It was also found that the CHM and CSL magnetic structures are macroscopic spin-phase coherent states.

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Chirality-Induced Spin-Polarized State of a Chiral Crystal CrNb3S6

Cited by 130 publications

References 27 publications

Detecting Chirality in Two-Terminal Electronic Nanodevices

Detecting Chirality in Two-Terminal Electronic Nanodevices

Magnetochiral Spin-Polarized Tunneling in a Paramagnetic State

Chiral Magnetism: Coupling Static and Dynamic Chirality

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