Origin of superconductivity in the Weyl semimetal 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>WT</mml:mi><mml:msub><mml:mi mathvariant="normal">e</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
 under pressure

Lu, Pengchao; Kim, Joon‐Seok; Yang, Jing; Gao, Hao; Wu, Juefei; Shao, Ding-Fu; Li, Bin; Zhou, Dawei; Sun, Junqiang; Akinwande, Deji; Xing, D. Y.; Lin, Jung Fu

doi:10.1103/physrevb.94.224512

Cited by 101 publications

(87 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The structural transition also casted a pressure range with the broadened superconducting transition, where zero resistance disappeared. This Td to 1T' phase transition was also investigated by P. Lu et al [36]. With ab initio calculations and high-pressure synchrotron X-ray diffraction and Raman spectroscopy, they found a Td to 1T' phase transition at around 4-5 GPa.…”

Section: Structural Phase Transition Under High Pressuresupporting

confidence: 59%

The study on quantum material WTe₂

Pan

Wang

Song

et al. 2018

Advances in Physics: X

View full text Add to dashboard Cite

show abstract

Section: Structural Phase Transition Under High Pressuresupporting

confidence: 59%

The study on quantum material WTe₂

Pan

Wang

Song

et al. 2018

Advances in Physics: X

View full text Add to dashboard Cite

show abstract

“…A feature of weak anti-localization effect in the nonlinear magnetoresistance curve was then observed, similar to what has been reported in the normal resistance state of WTe2 43 . Note that the proximity effect induced superconductivity in this work is related to the intrinsic band structure of WTe2 as a type-II Weyl semimetal, different from high pressure-induced superconductivity in the 1T' phase WTe2 [44][45][46][47] and superconductivity in the epitaxial WTe2 thin film on a sapphire substrate 48 .…”

mentioning

confidence: 87%

Proximity-Induced Superconductivity with Subgap Anomaly in Type II Weyl Semi-Metal WTe₂

Wang

et al. 2018

Nano Lett.

View full text Add to dashboard Cite

Due to the non-trivial topological band structure in type-II Weyl semimetal Tungsten ditelluride (WTe2), unconventional properties may emerge in its superconducting phase. While realizing intrinsic superconductivity has been challenging in the type-II Weyl semimetal WTe2, proximity effect may open an avenue for the realization of superconductivity. Here, we report the observation of proximityinduced superconductivity with a long coherence length along c axis in WTe2 thin flakes based on a WTe2/NbSe2 van der Waals heterostructure. Interestingly, we also observe anomalous oscillations of the differential resistance during the transition from superconducting to normal state. Theoretical calculations show excellent agreement with experimental results, revealing that such a sub-gap anomaly is the intrinsic property of WTe2 in superconducting state induced by the proximity effect. Our findings enrich the understanding of superconducting phase of type-II Weyl semimetals, and pave the way for their future applications in topological quantum computing.

show abstract

“…[17], superconductivity can be induced with a pressure as low as ∼25 kbar, which is close to the pressure range where a subtle structural transformation from T d phase to 1T phase was detected via powder X-ray diffraction and Raman spectroscopy [19,20]. However, these results contradict the study of Kang et al [18], which claims that the structure * skgoh@phy.cuhk.edu.hk of WTe 2 remains the same up to 200 kbar.…”

mentioning

confidence: 89%

Nearly isotropic superconductivity in the layered Weyl semimetal WTe2 at 98.5 kbar

et al. 2017

View full text Add to dashboard Cite

Layered transition metal dichalcogenide WTe2 has recently attracted significant attention due to the discovery of an extremely large magnetoresistance, a predicted type-II Weyl semimetallic state, and the pressure-induced superconducting state. By a careful measurement of the superconducting upper critical fields as a function of the magnetic field angle at a pressure as high as 98.5 kbar, we provide the first detailed examination of the dimensionality of the superconducting condensate in WTe2. Despite the layered crystal structure, the upper critical field exhibits a negligible field anisotropy. The angular dependence of the upper critical field can be satisfactorily described by the anisotropic mass model from 2.2 K (T /Tc ∼ 0.67) to 0.03 K (T /Tc ∼ 0.01), with a practically identical anisotropy factor γ ∼ 1.7. The temperature dependence of the upper critical field, determined for both H ⊥ ab and H // ab, can be understood by a conventional orbital depairing mechanism. Comparison of the upper critical fields along the two orthogonal field directions results in the same value of γ ∼ 1.7, leading to a temperature independent anisotropy factor from near Tc to < 0.01Tc. Our findings thus identify WTe2 as a nearly isotropic superconductor, with an anisotropy factor among one of the lowest known in superconducting transition metal dichalcogenides.The discovery of an extremely large and non-saturating magnetoresistance in semimetallic WTe 2 [1] has generated considerable research efforts [2][3][4][5][6][7][8][9][10][11]. The interest is further intensified with the prediction that WTe 2 can be a type-II Weyl semimetal, in which Weyl fermions emerge at the border between electron and hole pockets [12]. The crystal structure of WTe 2 consists of weaklybonded block-layers of W-Te atoms along the c direction. The layered nature of WTe 2 has facilitated the fabrication of devices based on thin layers of WTe 2 , enabling the application of gate voltage, and hence further exploration of fundamental physical properties in a controllable manner [8,[13][14][15][16].Another powerful tool to tune the properties of WTe 2 is pressure. With the application of pressure, superconductivity has been successfully induced in the bulk WTe 2 [17,18]. Although the temperature-pressure phase diagrams reported by two groups [17,18] are quite different, some qualitative similarities can still be observed. First, the superconducting transition temperature (T c ) takes a dome-shaped pressure dependence, with a maximum onset T c between 6.5 K and 7 K. Second, the magnetoresistance is significantly suppressed when the superconducting state sets in. In the work of Pan et al.[17], superconductivity can be induced with a pressure as low as ∼25 kbar, which is close to the pressure range where a subtle structural transformation from T d phase to 1T phase was detected via powder X-ray diffraction and Raman spectroscopy [19,20]. However, these results contradict the study of Kang et al. [18], which claims that the structure * skgoh@phy.cuhk.edu.hk of WTe...

show abstract

Origin of superconductivity in the Weyl semimetal WTe2 under pressure

Cited by 101 publications

References 47 publications

The study on quantum material WTe₂

The study on quantum material WTe₂

Proximity-Induced Superconductivity with Subgap Anomaly in Type II Weyl Semi-Metal WTe₂

Nearly isotropic superconductivity in the layered Weyl semimetal WTe2 at 98.5 kbar

Contact Info

Product

Resources

About

Origin of superconductivity in the Weyl semimetal WTe2 under pressure

Cited by 101 publications

References 47 publications

The study on quantum material WTe2

The study on quantum material WTe2

Proximity-Induced Superconductivity with Subgap Anomaly in Type II Weyl Semi-Metal WTe2

Nearly isotropic superconductivity in the layered Weyl semimetal WTe2 at 98.5 kbar

Contact Info

Product

Resources

About

The study on quantum material WTe₂

The study on quantum material WTe₂

Proximity-Induced Superconductivity with Subgap Anomaly in Type II Weyl Semi-Metal WTe₂