Solid-State 29Si, 113Cd, 119Sn, and 31P NMR Studies of II-IV-P2 Semiconductors

Growth and characterization of large CdSiP2 single crystals

“…They can, however, be plagued by defect related absorption losses near the band edge when grown from the melt, but these can often be eliminated by post-growth processing. CdSiP 2 is a II-IV-V 2 compound that has been examined by several authors starting in the late 1960s [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Borshchevskii et al [5] reported halogen assisted vapor transport growth of the compound as early as 1967, and Spring-Thorpe and Pamplin [4] reported growth from molten tin solution in 1968.…”

“…The birefringence of tiny 2 Â 2 Â 0.2 mm 3 CdSiP 2 crystals grown from a molten tin flux was measured by Itoh et al [2] and found to be À 0.045 at 840 nm. More recent studies examined the cathodoluminescence [11] and nuclear magnetic resonance (NMR) spectra [12] of small CdSiP 2 crystalline samples, and recent theoretical studies examined the calculated electronic band structure [13][14][15][16]. Crystals grown through either solution or halogen-assisted vapor transport were never of sufficient size or quality to create non-linear optical devices or to measure the ordinary and extraordinary refractive index of CdSiP 2 as a function of wavelength throughout its transparency range to determine if it could be phase matched.…”

Solid-State Nuclear Magnetic Resonance

“…For example, a variety of materials have been examined with silicon, cadmium, tin, and phosphorus NMR of these spin-1 / 2 nuclei (71).…”

Covalent Bonds in α‐SnF2 Monitored by J‐Couplings in Solid‐State NMR Spectra

“…Wiley-VCH ZAAC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 The shortest distances for heteronuclear and homonuclear pairs of nuclei reported for the X-ray structure [1] As a third contribution to line broadening, J-couplings have to be taken into account for 119 Sn, since it has been documented previously [9][10][11][12][13][14][15][16][17][18][19][20][21] that they may also be of the order of kHz. In fact, the J-couplings for 119 Sn can be so large that it has been possible to determine the anisotropy of this interaction in some organo-tin compounds [14] by using off-magic angle spinning.…”

“…Unlike dipolar couplings, which act through space, J-couplings are mediated by covalent bonds, and are difficult to observe in solid-state NMR, because they are usually much smaller than dipolar couplings [6][7][8]. For 119 Sn however, J-couplings tend to be comparatively large (in the range of kHz), and have been reported before in the literature for a variety of compounds [9][10][11][12][13][14][15][16][17][18][19][20][21]. The existence of J-couplings in α-SnF 2 shown here is further evidence for the existence of covalent Sn-F bonds in tin(II) fluoride.…”