Determination of spin-orbit scattering lifetime at the interface of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="normal">LaAlO</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:mo>/</mml:mo><mml:msub><mml:mi mathvariant="normal">SrTiO</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>
 from the superconducting upper critical fields

Singh, A. K.; Wu, Tung‐Chuan; Song, Ming; Chen, Ming‐Chin; Li, Chisheng; Yip, Sungkit; Lee, Wei‐Li

doi:10.1103/physrevresearch.2.013311

Cited by 3 publications

(3 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A possible explanation for this discrepancy is that Cooper pair formation and the normalstate electrical transport are dominated by electrons occupying different conduction channels or subbands at the interface. Similar behavior has also been observed for the LAO-STO system 41 . More exotic probabilities, such as SOC-enhanced spin susceptibility in the superconducting state (which naturally enhanced the Pauli…”

Section: Soc Relaxation Time In Magnetotransportsupporting

confidence: 83%

“…The much higher μ 0 H ==ab c2 relative to μ 0 H P (Fig. 4d) is likely to be caused by a strong spin-orbit interaction and/or V G -dependent electron wave function widths at the interface (which can be understood as the superconducting layer thickness d sc ): in an effective model for 2D superconductor with strong SOC, we have 17,41 :…”

Section: Electric-field Control Of Superconductivitymentioning

confidence: 97%

“…where τ so is the spin-orbit relaxation time (ε so ¼ h=τ so ), D is the diffusion constant obtained from the slope of the out-of-plane upper critical field: [-d(μ 0 H ==c c2 )/dT] T=Tc = 4k B /πDe (we use the data in Supplementary Fig. 5c to fit D because sample #2 has similar μ 0 H c2 with the gating sample) 41 . The fits of μ 0 H c2 using Eq.…”

Section: Electric-field Control Of Superconductivitymentioning

confidence: 99%

See 2 more Smart Citations

Tunable two-dimensional superconductivity and spin-orbit coupling at the EuO/KTaO3(110) interface

et al. 2022

View full text Add to dashboard Cite

Unconventional quantum states, most notably the two-dimensional (2D) superconductivity, have been realized at the interfaces of oxide heterostructures where they can be effectively tuned by the gate voltage (VG). Here we report that the interface between high-quality EuO (111) thin film and KTaO3 (KTO) (110) substrate shows superconductivity with onset transition temperature $$T_{{{\mathrm{c}}}}^{{{{\mathrm{onset}}}}}$$ T c onset = 1.35 K. The 2D nature of superconductivity is verified by the large anisotropy of the upper critical field and the characteristics of a Berezinskii–Kosterlitz-Thouless transition. By applying VG, $$T_{{{\mathrm{c}}}}^{{{{\mathrm{onset}}}}}$$ T c onset can be tuned from ~1 to 1.7 K; such an enhancement can be possibly associated with a boosted spin-orbit energy $$\varepsilon _{{{{\mathrm{so}}}}} = \hbar /\tau _{{{{\mathrm{so}}}}}$$ ε so = ħ / τ so , where τso is the spin-orbit relaxation time. Further analysis of τso based on the upper critical field (Hc2) and magnetoconductance reveals complex nature of spin-orbit coupling (SOC) at the EuO/KTO(110) interface with different mechanisms dominating the influence of SOC effects on the superconductivity and the magnetotransport in the normal state. Our results demonstrate that the SOC should be considered an important factor in determining the 2D superconductivity at oxide interfaces.

show abstract

Section: Soc Relaxation Time In Magnetotransportsupporting

confidence: 83%

Section: Electric-field Control Of Superconductivitymentioning

confidence: 97%

Section: Electric-field Control Of Superconductivitymentioning

confidence: 99%

See 1 more Smart Citation

Tunable two-dimensional superconductivity and spin-orbit coupling at the EuO/KTaO3(110) interface

et al. 2022

View full text Add to dashboard Cite

show abstract

Exploring anisotropic phases and spin transport in perovskite heterostructures: Insights into 3d/5d interfaces for antiferromagnetic spintronics

Sardar,

Vagadia,

Tank

et al. 2024

Journal of Applied Physics

View full text Add to dashboard Cite

Transition metal oxides (TMOs) demonstrate a broad spectrum of properties encompassing electronic correlations, anisotropic transport, magnetism, and optical behavior. The anisotropy arises from both intrinsic crystal symmetry and extrinsic factors like epitaxial strain and structural asymmetry at TMO interfaces. Weiss and Neel's work has elucidated anisotropic magnetic behavior in antiferromagnetic (AFM) materials. AFM TMOs exhibit unique magnetotransport behavior, including weak antilocalization (WAL) and anisotropic magnetoresistance (AMR). Understanding the magnetic structure and band topology in AFM perovskites and their interfaces enables the tailored design of materials for spintronics and energy conversion. In few interfaces lacking inversion symmetry, Rashba spin–orbit coupling (SOC) induces WAL, a quantum correction in conductivity in a two-dimensional electronic system. Electron accumulation and charge transfer across 3d, 5d transition metal-based perovskite interfaces affect WAL and AMR, as observed in 3d/3d and 3d/5d AFM heterostructures, respectively. Advancements in spintronics rely on exploring spin-dependent transport anisotropy. This review focuses on various scattering mechanisms, categorized as extrinsic and intrinsic, in anisotropic transport, particularly in 3d/5d AFM superlattices. The WAL scattering mechanism depends on both intrinsic factors related to Rashba SOC-induced band topology and extrinsic sources like spin impurities and lattice ions. Moreover, the investigation into AMR mechanisms involves the application of impurity-based extrinsic scattering models, which are aligned with the Rashba and Dresselhauss models on Fermi surfaces. This exploration specifically targets the interface of two-band insulators, exemplified by LaAlO3/SrTiO3 and LaVO3/KTaO3. Furthermore, this model achieves comprehensive coverage, extending its applicability to 3d/5d AFM heterostructures like LaMnO3/SrIrO3 and CaMnO3/CaIrO3. Additionally, the intrinsic scattering mechanism tied to Berry phase effects related to band topology is studied, focusing on the CaMnO3/CaIrO3 superlattice. Despite manipulation challenges stemming from reduced stray fields, AFM materials show potential in interface physics and applications within the realm of spintronics.

show abstract

Effectively tuning the quantum Griffiths phase by controllable quantum fluctuations

Wang,

Ying,

Guo

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

Quantum Griffiths phase (QGP), marked by a quantum Griffiths singularity with a divergent effective critical exponent, has garnered considerable attention in the realm of superconductivity. However, the ability to control QGP remains elusive. Here, we demonstrate that QGP at the LaAlO 3 /KTaO 3 (110) interface can be efficiently modulated by the orientation of applied magnetic field: With a perpendicular field, an anomalous QGP emerges in the low-temperature regime, characterized by a decreasing critical field as temperature lowers; conversely, with a parallel field, a normal QGP arises, where the critical field increases with decreasing temperature. Such opposite characteristics stem from the controllable quantum fluctuations and conductivity corrections under distinct magnetic field orientations. Furthermore, we show the effective tuning of the phase boundary by electrostatic gating, attributed to the gate-controlled quantum fluctuations. These findings not only demonstrate how to experimentally manipulate QGP but also provide a comprehensive understanding of how quantum fluctuations can effectively modulate QGP.

show abstract

Determination of spin-orbit scattering lifetime at the interface of LaAlO3/SrTiO3 from the superconducting upper critical fields

Cited by 3 publications

References 53 publications

Tunable two-dimensional superconductivity and spin-orbit coupling at the EuO/KTaO3(110) interface

Tunable two-dimensional superconductivity and spin-orbit coupling at the EuO/KTaO3(110) interface

Exploring anisotropic phases and spin transport in perovskite heterostructures: Insights into 3d/5d interfaces for antiferromagnetic spintronics

Effectively tuning the quantum Griffiths phase by controllable quantum fluctuations

Contact Info

Product

Resources

About