Theory of Nematic Superconductivity in Doped Topological Insulators (Brief Review)

Khokhlov, D. A.; Akzyanov, R. S.; Rakhmanov, A. L.

doi:10.1134/s0021364022601816

Cited by 2 publications

(1 citation statement)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Properties of topological insulators and Weyl semimetals were considered in works [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Dirac materials, which include graphene, topological insulators and Dirac and Weyl semimetals, represent new states of matter with unique electronic structure and new physical properties.…”

Section: Discussionmentioning

confidence: 99%

Plasma conduction mechanism in topological insulators

Netesova

2024

Oxide-Based Materials and Devices XV

View full text Add to dashboard Cite

The conducting properties of crystal topological insulators and Weyl semimetals within the plasma mechanism of superconductivity have been considered. Such compounds A2B3, AB2, AB are bismuth selenide Bi2Se3 and telluride Bi2Te3, antimony telluride Sb2Te3 and their solid solutions, tungsten telluride WTe2, magnesium diboride MgB2, tantalum arsenide TaAs, tantalum phosphide TaP, niobium arsenide NbAs, niobium phosphide NbP.The equation has been proposed 2 AB = A2 + B2 + ▲Φ.Square plasma electron energies Φ 2 (ρ, s, M, q, β), square electron splitting energies ▲Φ 2 in (eV) 2 were calculated, where Φ 2 (ab), Φ 2 (a), Φ 2 (b) -square electron energy AB, A, B, ▲Φ 2 is square energy splitting of compounds into diatomic molecules at absolute zero Tc = 0, respectively, ρ is the density, s is the number of valence electrons, M is the molecular (atomic) mass, q and β are parameters.▲Φ 2 (Bi2Se3) = 765.70143384 ▲Φ 2 (Bi2Te3) = 672.88715592 ▲Φ 2 (Sb2Te3) = 704.74855610 ▲Φ 2 (WTe2) = 367.01888428 ▲Φ 2 (MgB2) = 435.17777627 ▲Φ 2 (TaAs) = ▬102.44793138 ▲Φ 2 (TaP) = ▬246.35400903 ▲Φ 2 (NbAs) = ▬83.59742866 ▲Φ 2 (NbP) = ▬241.26056837. β = 2.5, q (Bi2Se3) = 1.02608569, Tc = ▬ 7.3039932 K β = 2.5, q (Bi2Te3) = 0.997794409, Tc = 0.61756548 K β = 2.5, q (Sb2Te3) = 1.015846129, Tc = ▬ 4.43691612 K According to our calculations, superconductivity of doped A2B3 topological insulators was found above absolute zero temperature. Additional restrictions are caused by strong spin-orbit coupling. Theoretical calculations are confirmed by known experimental data.

show abstract

Section: Discussionmentioning

confidence: 99%

Plasma conduction mechanism in topological insulators

Netesova

2024

Oxide-Based Materials and Devices XV

View full text Add to dashboard Cite

show abstract

Magnetisation control of the nematicity direction and nodal points in a superconducting doped topological insulator

Khokhlov,

Akzyanov,

Kapranov

2024

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

We study the effects of magnetisation on the properties of the doped topological insulator of the $\text{Bi}_2\text{Se}_3$ family with nematic superconductivity. We found that the direction of the in-plane magnetisation fixes the direction of the nematicity in the system. The chiral state is more favourable than the nematic state for large values of out-of-plane magnetisation. Overall, the critical temperature of the nematic superconductivity is robust against magnetisation. We explore in detail the spectrum of the system with the pinned direction of the nematic order parameter $\Delta_{y}$. Without magnetisation, there is a full gap in the spectrum because of finite hexagonal warping. At an out-of-plane $m_z$ or orthogonal in-plane $m_x$ magnetisation that is strong enough, the spectrum is closed at the nodal points that are split by the magnetisation. Flat Majorana surface states connect such split bulk nodal points. Parallel magnetisation $m_y$ lifts the nodal points and opens a full gap in the spectrum. We discuss relevant experiments and propose experimental verifications of our theory.

show abstract

Theory of Nematic Superconductivity in Doped Topological Insulators (Brief Review)

Cited by 2 publications

References 70 publications

Plasma conduction mechanism in topological insulators

Plasma conduction mechanism in topological insulators

Magnetisation control of the nematicity direction and nodal points in a superconducting doped topological insulator

Contact Info

Product

Resources

About