Observation of Distinct Spatial Distributions of the Zero and Nonzero Energy Vortex Modes in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi>Li</mml:mi></mml:mrow><mml:mrow><mml:mn>0.84</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi>Fe</mml:mi></mml:mrow><mml:mrow><mml:mn>0.16</mml:mn></mml:mrow></mml:msub><mml:mo stretchy="false">)</mml:mo><mml:mi>OHFeSe</mml:mi></mml:math>

Zhang, Tianzhen; Bao, Wenjing; Chen, Chen; Liu, Dong; Lu, Zouyuwei; Hu, Yining; Yang, Wentao; Zhao, Dongming; Yan, Y. J.; Dong, Xianlin; Wang, Qiang-Hua; Zhang, Tong; Feng, D. L.

doi:10.1103/physrevlett.126.127001

Cited by 20 publications

(6 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We notice that, in the layered iron-based superconductor CaKFe 4 As 4 , intergrowth phases could significantly affect the vortex pinning properties [30]. In the present intercalate films of (Li,Fe)OHFeSe, however, we observe no indication of such planar defects by scanning transmission electron microscopy [31] or STM [26][27][28]. Moreover, as will be seen below, the shoulder feature is reproducibly observed in the high-quality (Li,Fe)OHFeSe films with high RRR and T c values, whereas it is undetectable in the films with much-reduced RRR and lower T c values.…”

contrasting

confidence: 50%

“…The level of disorder can be controlled by adjusting the synthesis temperature in the range from 120 • C to 180 • C [25]. The crystalline quality of all the hydrothermal (Li,Fe)OHFeSe films studied here is better than the bulk single crystals as well as iron-based films obtained by common deposition methods, as demonstrated by the results of x-ray diffraction [23] and other probes such as scanning tunneling microscopy (STM) [26][27][28] and electronic Raman spectroscopy [29]. The electrical transport properties were measured under magnetic fields along c-axis up to 16 T on a Quantum Design PPMS system with the standard fourprobe method.…”

mentioning

confidence: 86%

See 1 more Smart Citation

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe

Li¹,

Shen²,

Tian³

et al. 2022

Supercond. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

The magneto-transport properties are systematically measured under c-direction fields up to 33 T for a series of single-crystal films of intercalated iron-selenide superconductor (Li,Fe)OHFeSe. The film samples with varying degree of disorder are grown hydrothermally. We observe a magnetic-field-enhanced shoulder-like feature in the mixed state of the high-Tc (Li,Fe)OHFeSe films with weak disorder, while the feature fades away in the films with enhanced disorder. The irreversibility field is significantly suppressed to lower temperatures with the appearance of the shoulder feature. Based on the experiment and model analysis, we establish a new vortex phase diagram for the weakly disordered high-Tc (Li,Fe)OHFeSe, which features an emergent dissipative vortex phase intermediate between the common vortex glass and liquid phases. The reason for the emergence of this intermediate vortex state is further discussed based on related experiments and models.

show abstract

contrasting

confidence: 50%

mentioning

confidence: 86%

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe

Li¹,

Shen²,

Tian³

et al. 2022

Supercond. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The nodeless d-wave state is unlikely because the strength of spin-orbit coupling (SOC) between electron pockets is comparable to that of pairing [13][14][15]. Moreover, the behavior of Caroli-de Gennes-Matricon states in the vortex core disfavors d-wave pairing [16,17]. On the other hand, the controversy over the two leading contenders, i.e., sign-preserving sand sign-changed s ± -wave, remains unresolved, despite extensive impurity-scattering investigations [18][19][20][21][22][23][24] including measurements employing the recently developed quasiparticle interference technique [18][19][20][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Identifying $s$-wave pairing symmetry in single-layer FeSe from topologically trivial edge states

Wei¹,

Qin²,

Ding³

et al. 2022

Preprint

View full text Add to dashboard Cite

Determining the pairing symmetry of single-layer FeSe on SrTiO 3 is the key to understanding the enhanced pairing mechanism; furthermore, it guides exploring new superconductors with high transition temperatures (T c ). Despite significant efforts, it remains controversial whether the symmetry is the sign-preserving sor the sign-changed s ± -wave. Here, we investigate the pairing symmetry of single-layer FeSe from a topological point of view. Using low-temperature scanning tunneling microscopy/spectroscopy, we have systematically characterized the superconducting states at isolated edges and corners of single-layer FeSe. The tunneling spectra collected at edges and corners exhibit full gap and substantial dip, respectively, demonstrating the absence of topologically non-trivial edge/corner modes. According to the theoretical calculation, these spectroscopic features are strong evidence for the sign-preserving s-wave pairing.

show abstract

“…This offers a great advantage for the experimental realization and detection of MZMs. For example, the clear zero-bias conductance peak [23][24][25][26] and integer quantized Caroli states [27,28] have been observed in a variety of iron-based superconducting materials [23,27,[29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Controllable Majorana vortex states in iron-based superconducting nanowires

Li¹,

Luo²,

Chen³

et al. 2021

Preprint

View full text Add to dashboard Cite

There has been experimental evidence for the Majorana zero modes (MZMs) in solid state systems, which are building blocks for potential topological quantum computing. It is important to design devices, in which MZMs are easy to manipulate and possess a broad topological non-trivial parameter space for fusion and braiding. Here, we propose that the Majorana vortex states in ironbased superconducting nanowires fulfill these desirable conditions. This system has a radius-induced topological phase transition, giving a lower limit to the radius of the nanowire. In the topological phase, there is only one pair of MZMs in the nanowire over a wide range of radius, chemical potential, and external magnetic field. The wavefunction of the MZM has a sizable distribution at the side edge of the nanowire. This property enables one to control the interaction of the MZMs in neighboring vortex nanowires, and paves the way for Majorana fusion and braiding.

show abstract

Observation of Distinct Spatial Distributions of the Zero and Nonzero Energy Vortex Modes in (Li0.84Fe0.16)OHFeSe

Cited by 20 publications

References 47 publications

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe

Identifying $s$-wave pairing symmetry in single-layer FeSe from topologically trivial edge states

Controllable Majorana vortex states in iron-based superconducting nanowires

Contact Info

Product

Resources

About

Observation of Distinct Spatial Distributions of the Zero and Nonzero Energy Vortex Modes in (Li0.84Fe0.16)OHFeSe

Cited by 20 publications

References 47 publications

A disorder-sensitive emergent vortex phase identified in high-T c superconductor (Li,Fe)OHFeSe

A disorder-sensitive emergent vortex phase identified in high-T c superconductor (Li,Fe)OHFeSe

Identifying $s$-wave pairing symmetry in single-layer FeSe from topologically trivial edge states

Controllable Majorana vortex states in iron-based superconducting nanowires

Contact Info

Product

Resources

About

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe

A disorder-sensitive emergent vortex phase identified in high-T _c superconductor (Li,Fe)OHFeSe