Magnetic anisotropy in Shiba bound states across a quantum phase transition

The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of the paired superconducting quasiparticles. Here, we use scanning tunneling spectroscopy to identify the different quantum ground states of Manganese phthalocyanine on Pb(111). We observe Shiba states, which are split into triplets by magnetocrystalline anisotropy. Their characteristic spectral weight yields an unambiguous proof of the nature of the quantum ground state.Comment: 6 pages, 4 figure

Magnetic anisotropy in Shiba bound states across a quantum phase transition

The exchange coupling between magnetic adsorbates and a superconducting substrate leads to Shiba states inside the superconducting energy gap and a Kondo resonance outside the gap. The exchange coupling strength determines whether the quantum many-body ground state is a Kondo singlet or a singlet of the paired superconducting quasiparticles. Here we use scanning tunnelling spectroscopy to identify the different quantum ground states of manganese phthalocyanine on Pb(111). We observe Shiba states, which are split into triplets by magnetocrystalline anisotropy. Their characteristic spectral weight yields an unambiguous proof of the nature of the quantum ground state. Our results provide experimental insights into the phase diagram of a magnetic impurity on a superconducting host and shine light on the effects induced by magnetic anisotropy on many-body interactions

El marketing relacional y la fidelización de los clientes de Martha Salón & Spa, Pueblo Libre 2022

La investigación tuvo como objetivo general determinar la relación entre el marketing relacional y la fidelización de los clientes de Martha Salón y Spa, Pueblo Libre 2022. En la cual, se siguió la siguiente metodología: fue de enfoque cuantitativo de tipo aplicada; de diseño no experimental de corte transversal; y con un nivel correlacional. Siendo la población infinita, utilizando el muestreo no probabilístico por conveniencia, teniendo un tamaño de muestra de 50 clientes. Así mismo se aplicó la técnica de la encuesta y el instrumento denominado como cuestionario; en lo que respecta a la validez fue validado por el juicio de tres expertos, teniendo un índice del 88%, interpretándose como excelente. Por otro lado, con un Alfa de Cronbach de ,979, se sostuvo una fiabilidad excelente de los datos recolectados. Con un resultado de Rho de Spearman de ,792, se afirmó un nivel de correlación positiva muy fuerte; concluyendo que una aplicación idónea de las estrategias y medidas del marketing relacional, en lo que respecta a las vivencias del consumidor, la imagen de la empresa junto a la comunicación y gestión de la información, permite la retención y la posterior fidelización de los clientes

Abortive vampire bat rabies infections in Peruvian peridomestic livestock

Rabies virus infections normally cause universally lethal encephalitis across mammals. However, ‘abortive infections’ which are resolved prior to the onset of lethal disease have been described in bats and a variety of non-reservoir species. Here, we surveyed rabies virus neutralizing antibody titers in 332 unvaccinated livestock of 5 species from a vampire bat rabies endemic region of southern Peru where livestock are the main food source for bats. We detected rabies virus neutralizing antibody titers in 11, 5 and 3.6% of cows, goats and sheep respectively and seropositive animals did not die from rabies within two years after sampling. Seroprevalence was correlated with the number of local livestock rabies mortalities reported one year prior but also one year after sample collection. This suggests that serological status of livestock can indicate the past and future levels of rabies risk to non-reservoir hosts. To our knowledge, this is the first report of anti-rabies antibodies among goats and sheep, suggesting widespread abortive infections among livestock in vampire bat rabies endemic areas. Future research should resolve the within-host biology underlying clearance of rabies infections. Cost-effectiveness analyses are also needed to evaluate whether serological monitoring of livestock can be a viable complement to current monitoring of vampire bat rabies risk based on animal mortalities alone