Topological superconductivity in helical crystals

Soma Yoshida; Keiji Yada; Yukio Tanaka; Takehito Yokoyama

doi:10.1103/PhysRevB.107.205305

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Topological superconductivity in helical crystals

Soma Yoshida, Keiji Yada, Yukio Tanaka, Takehito Yokoyama

DOI 10.1103/PhysRevB.107.205305 · Physical Review B

T1

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Abstract

We study superconductivity and surface Andreev bound states in helical crystals. We consider the interlayer pairings along the helical hopping and investigate the surface local density of states on the (001) and zigzag surfaces for all the possible irreducible representations. There are three and four irreducible representations exhibiting the zero-energy peaks in the local density of states at the (001) and zigzag surfaces of helical lattices, respectively. By calculating the one-dimensional winging number, we show that these appearances of the zero-energy peaks stem from the surface Andreev bound states.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Te Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
NbRh2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
TaRh2B2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown