A distinctive identifier of nodal intrinsic topological superconductivity (ITS) would the appearance of an Andreev bound state on crystal surfaces parallel to the nodal axis, in the form of a topological quasiparticle surface band (QSB) appearing only for \(T < T_{C}\) . Moreover, the theory shows that specific QSB characteristics observable in tunneling to an s-wave superconductor can distinguish between chiral and non-chiral ITS order parameter \(\Delta_{{\varvec{k}}}\) . To search for such phenomena in UTe2, s-wave superconductive scan-tip scanning tunneling microscopy (STM) imaging was employed. It reveals an intense zero-energy Andreev conductance maximum at the UTe2 (0–11) crystal termination. The development of the zero-energy Andreev conductance peak into two finite-energy particle-hole symmetric conductance maxima as the tunnel barrier is reduced and then signifies that UTe2 superconductivity is non-chiral. Quasiparticle interference imaging (QPI) for an ITS material should be dominated by the QSB for energies within the superconductive energy gap \(\left| E \right| \le {\Delta }\) , so that bulk \(\Delta_{{\varvec{k}}}\) characteristics of the ITS can only be detected excursively. Again using a superconducting scan-tip, the in-gap quasiparticle interference patterns of the QSB of UTe2 were visualized. Specifically, a band of Bogoliubov quasiparticles appears as a characteristic sextet \({\varvec{q}}_{i} :i = 1 - 6{ }\) of interference wavevectors, showing that QSB dispersions \(\varvec{k}\) (E) occur only for energies \(\left| E \right| \le \Delta_{\max }\) and only within the range of Fermi momenta projected onto the (0–11) crystal surface. In combination, these phenomena are consistent with a bulk \(\Delta_{{\varvec{k}}}\) exhibiting spin-triplet, time-reversal conserving, odd-parity, a-axis nodal, B3u symmetry in UTe2.
