X-ray photoelectron study of NiAs-type MnTe

Magnetic Properties and Photocatalytic Applications of 2D Sheets of Nonlayered Manganese Telluride by Liquid Exfoliation

“…XPS analysis of the Mn 2p and Te 3d of exfoliated MnTe sheets are shown in Figure b,c, respectively. The Mn 2p doublets (Mn 2p 3/2 and Mn 2p 1/2 ) at 640.8 and 652.7 eV are from Mn–Te bonding; the doublets at 642.4 and 653.9 eV are contributed by MnO 2 residing on the surface. , Te 3d spectra, however, have predominant Te–Mn doublets (573 and 583.4 eV) and only traces of Te–O doublets (576 and 586.4 eV). Therefore, Raman spectra together with XPS results confirm the purity of MnTe phase.…”

Antiferromagnetic topological insulator MnBi2Te4: synthesis and magnetic properties

“…Furthermore, the oxidation states for each elements can be assigned in the corresponding highresolution spectra in Figure 3a-c. Two peaks in Bi 4f spectrum at 157.8 eV and 163.1 eV are ascribed to Bi 4f7/2 and Bi 4f5/2 of Bi 3+ in Bi-Te bonds (Figure 3a) [32][33][34] . As shown in Figure 3b, Te 3d spectrum contains two major peaks at 572.2 eV (Te 3d5/2) and 582.6 eV (Te 3d3/2), corresponding to Te 2in Bi-Te bonds and Mn-Te bonds 33,35 . In addition, two minor peaks at 576.0 eV and 586.3 eV can be observed in Te 3d spectrum, which is attributed to Te-O bonds and indicates slight oxidation of MnBi2Te4 surface 32 .…”

“…Mn3 and Mn3 ′ at 642.5 and 655.5 eV, and Mn4 and Mn4 ′ at 645.8 and 658.6 eV are satellite peaks of Mn1 and Mn1 ′ , and Mn2 and Mn2 ′ , respectively, which results from the charge transfer between the outer shell of Te and the unfilled 3d shell of Mn in the photoelectron process. [35][36][37][38] To reveal the oxidation stability, we exposed MnBi2Te4 crystals to air over a week, and then investigated the oxidation states with XPS. The survey spectrum in Figure S3b shows an evidently higher O 1s peak, indicating the severer oxidation owing to longer exposure to air.…”

Glassy magnetic ground state in layered compound MnSb2Te4

“…and Mn3′ peaks at 642.5 and 654.8 eV, and Mn4 and Mn4′ peaks at 645.0 and 657.9 eV are satellite peaks of Mn1 and Mn1′, and Mn2 and Mn2′, respectively, which result from the charge transfer between the unfilled 3d shell of Mn and the outer shell of Te in the photoelectron process, similar to MnBi 2 Te 4 [45][46][47][48]. For the Te 3d spectrum in Fig.…”