Anisotropic magnetoresistance and electronic features of the candidate topological compound praseodymium monobismuthide.

PrBi, a sister member of the rare-earth monopnictide family, is an excellent candidate for studying extreme magnetoresistance and nontrivial topological electronic states. In this study, we perform angular magnetoresistance measurements as well as bulk and surface band structure calculations on this compound. PrBi's magnetoresistance is revealed to be significantly angle-dependent and shows a fourfold symmetry as always observed in the nonmagnetic isostructural counterparts, including LaSb, LaBi, and LuBi. Its angular magnetoresistance can be reproduced well using the semiclassical two-band model. The deduced parameters suggest that PrBi hosts an elongated electron pocket with a mobility anisotropy of ∼3.13 and is slightly uncompensated in its carrier concentration. Our bulk and surface band structure calculations confirm the anisotropic electronic features. Moreover, we reveal that a nodal-line-shaped surface state appears at the X̄ point, and is associated with the quadratic dispersion along the -X̄ direction, and the linear type-I Dirac dispersion along the X̄-M̄ direction. Owing to the type-I Dirac dispersion feature, PrBi could serve as a promising material platform for studying many unexpected physical properties, such as the highly anisotropic transport and valley polarization of electrons.

Self-powered broadband, high-detectivity and ultrafast photodetectors based on Pd-MoS2/Si heterojunctions.

In this work, a self-powered photodetector device is fabricated through the integration of a palladium-doped molybdenum disulfide thin film on silicon (Pd-MoS2/Si). The substitution of host Mo atoms with Pd dopants in the MoS2 film is revealed by structural and chemical analysis techniques. Due to the incorporation of Pd atoms into the MoS2 films, the photovoltaic characteristics of the fabricated Pd-MoS2/Si device were enhanced largely, promoting its application as a self-powered photodetector operated at zero bias voltage. The obtained results further show that the device is highly sensitive to broadband wavelengths from ultraviolet to near-infrared light (300-1100 nm). In particular, the Pd-MoS2/Si photodetector shows an ultra-high detectivity of ∼10(14) Jones (Jones = cm Hz(1/2) W(-1)), a responsivity of ∼654.0 mA W(-1), and an ultrafast response speed of ∼2.1 µs. The present work opens new avenues for developing high-performance photodetectors for optical communications and imaging techniques as well as optoelectronic circuits.

HLA-C*06:103, a novel allele was identified in a Chinese patient awaiting hematopoietic stem cell transplantation.

HLA-C*06:103 shows four nucleotides difference from that of HLA-C*06:02:01:01.

Identification of a novel HLA-A*02:06:14 allele by polymerase chain reaction sequence-based typing in a Chinese bone marrow donor.

HLA*02:06:14 differs from HLA-A*02:06:01 by a single nucleotide substitution G > A at position 246.

Two novel HLA-DQB1*03:03 alleles, HLA-DQB1*03:03:08 and DQB1*03:03:13, were identified in Chinese individuals.

Compared with HLA-DQB1*03:03:02:01, HLA-DQB1*03:03:08 and DQB1*03:03:13 have 330 G>C and 349 T>C changes, respectively.

A novel HLA-A*32 allele, A*32:67 was identified by polymerase chain reaction sequence-based typing in a Chinese individual.

HLA-A*32:67 has a single nucleotide difference at position 286 C>A compared with HLA-A*32:01:01.

Identification of the novel HLA-B*15:257 allele by polymerase chain reaction sequence-based typing in a Chinese individual.

HLA-B*15:257 has one nucleotide change in exon 2 at position 232C>G from B*15:01:01:01.

Magnetic properties and critical behaviors of the nodal-line semimetal candidate ErIn3.

The AuCu3-type intermetallic compoundsReIn3(Re= a rare earth ion) with type-IV magnetic space groups are predicted to show topologically nontrivial electronic states. Here, we grow ErIn3single crystals, and study their magnetic properties and critical behaviors by means of the magnetic susceptibility, and magnetization isotherm measurements. Combining a detailed analysis of the magnetic susceptibility and isothermal magnetization, we find that this compound harbors a complicated magnetic phase diagram, and its magnetic moment arrangement appears not to simply follow the fashion as observed in the isostructural counterpart GdIn3(it adopts a conventional type-Cmagnetic structure that belongs to type-IV magnetic space groups). A careful study of the magnetic properties around the antiferromagnetic (AFM)-paramagnetic transition yields the critical exponentsß= 0.309 (0.297),γ= 1.117 (1.038), andδ= 4.617 (4.454), indicating that the tricritical mean field model or the three-dimensional Ising model works for ErIn3's magnetic behaviors and the presence of a long-range AFM interaction therein. Besides, the exchange interaction distanceJ(r) ∼r-4.665as well confirms a long-range magnetic coupling in ErIn3. Our results offer the clues that the magnetic structure varies from one member ofReIn3family to another, and to confirm their electronic features in the AFM phases further experimental and theoretical studies are still desired.

Coupled electronic and magnetic relaxation in Fe1+yTe: direct evidence for the interaction between itinerant carriers and local moments.

Iron chalcogenides are of particular interests among iron-based superconductors due to their distinct properties such as high-Tcon FeSe monolayer and competing magnetic correlations in Fe1+yTe. Here we report unusual transport properties observed near the critical composition of Fe1+yTe (y∼ 0.09) where competing magnetic correlations exist. The resistivity exhibits surprising temperature-dependent relaxation behavior belowTN, resulting in the increase of resistivity with time for 35 K

Identification of the novel HLA-B*27:04:06 allele in a Chinese bone marrow donor.

HLA-B*27:04:06 differs from HLA-B*27:04:01 by a single-nucleotide substitution at position 396 C > A.

The novel HLA-A*02:625 allele was identified in a Chinese bone marrow donor.

HLA-A*02:625 differs from HLA-A*02:06:01:01 by a single nucleotide substitution at position 806 C>T.

Identification of the novel HLA-DQB1*03:181 allele in a Chinese leukemia patient.

HLA-DQB1*03:181 has one nucleotide change from HLA-DQB1*03:05:01 at position 470C>G.

Identification of the novel HLA-B*40:333 allele by polymerase chain reaction sequence-based typing.

HLA-B*40:333 differs from HLA-B*40:01:01 by a single nucleotide substitution at position 380 T>C.

Identification of the novel HLA-B*27:147 allele by polymerase chain reaction sequence-based typing.

HLA-B*27:147 differs from HLA-B*27:04:01 by a single nucleotide substitution at position 523 C>G.

Identification of 2 novel HLA-B alleles, HLA-B*55:02:09 and HLA-B*55:80 in Chinese individuals.

HLA-B*55:02:09 and HLA-B*55:80 differ from HLA-B*55:02:01 by 1 single nucleotide substitution, respectively.

Identification of the novel HLA-DRB1*15:127 allele by polymerase chain reaction sequence-based typing in a Chinese bone marrow donor.

HLA-DRB1*15:127 has 1 nucleotide change from HLA-DRB1*15:01:01:01 at position 308 C>G.

Identification of the novel HLA-B*13:83 allele by polymerase chain reaction sequence-based typing in a Chinese cord blood donor.

HLA-B*13:83 differs from HLA-B*13:01:01 by 2 nucleotide substitutions at positions 103 and 106.

Identification of the novel HLA-DRB1*08:69 allele by polymerase chain reaction sequence-based typing in a Chinese cord blood donor.

HLA-DRB1*08:69 has one nucleotide change from HLA-DRB1*08:03:02 at position 262 G>A.

A novel HLA-C allele, HLA-C*08:128, was identified in a leukemia patient by polymerase chain reaction sequence-based typing.

HLA-C*08:128 shows a substitution C to T at position 704 when compared to HLA-C*08:01:01.