29,576 research outputs found

### Specific heat study of spin-structural change in pyrochlore Nd$_2$Mo$_2$O$_7$

By measurements of specific heat, we have investigated the magnetic field
($H$) induced spin-structural change in Nd$_2$Mo$_2$O$_7$ that shows
spin-chirality-related magneto-transport phenomena. A broad peak around 2 K
caused by the ordering of 2-in 2-out structure of the Nd moments at zero $H$
shifts to the lower temperature ($T$) up to around 3 T and then to the higher
$T$ above around 3 T with increasing $H$ for all the direction of $H$. This is
due to the crossover from antiferromagnetic to ferromagnetic arrangement
between the Nd and Mo moments. While the peak $T$ increases monotonically above
3 T for $H$//[100], another peak emerges around 0.9 K at 12 T for $H$//[111],
which is ascribed to the ordering of 3-in 1-out structure. For $H$//[110], a
spike like peak is observed at around 3 T, which is caused perhaps by some spin
flip transition.Comment: 5 pages, 4 figure

### The lipid composition and its alteration during the growth stage in pathogenic fungus, epidermophyton floccosum

Qualitative and quantitative changes of lipid components during the growth stages were studied in E. floccosum. The acyl group components of total lipids of Trichophyton rubrum and Microsporum cookei were also examined. The lipids of E. floccosum amounted to approximately 4% of the dry cell weight. Neutral lipids mainly consisted of triglycerides and sterols, and major polar lipids were phosphatidylcholine, phosphatidylethanolamine, and an unknown lipid X. The fatty acids in tryglycerides and phospholipids were palmitic, palmitoleic, stearic, oleic, and linoleic acids. The unknown polar lipid X which appeared between phosphatidylethanolamine and cardiolipin on thin layer chromatography plates contained no phosphorus. There was no significant change in the fatty acid components of E. floccosum and T. rubrum during the cell growth, whereas profound changes occurred in M. cookei. The sterol components of E. floccosum showed striking changes depending on the growth stage

### Degree-constrained Subgraph Reconfiguration is in P

The degree-constrained subgraph problem asks for a subgraph of a given graph
such that the degree of each vertex is within some specified bounds. We study
the following reconfiguration variant of this problem: Given two solutions to a
degree-constrained subgraph instance, can we transform one solution into the
other by adding and removing individual edges, such that each intermediate
subgraph satisfies the degree constraints and contains at least a certain
minimum number of edges? This problem is a generalization of the matching
reconfiguration problem, which is known to be in P. We show that even in the
more general setting the reconfiguration problem is in P.Comment: Full version of the paper published at Mathematical Foundations of
Computer Science (MFCS) 201

### Multiple Broken Symmetries in Striped La$_{2-x}$Ba$_{x}$CuO$_{4}$ detected by the Field Symmetric Nernst Effect

We report on a thermoelectric investigation of the stripe and superconducting
phases of the cuprate La$_{2-x}$Ba$_{x}$CuO$_{4}$ near the $x=1/8$ doping known
to host stable stripes. We use the doping and magnetic field dependence of
field-symmetric Nernst effect features to delineate the phenomenology of these
phases. Our measurements are consistent with prior reports of time-reversal
symmetry breaking signatures above the superconducting $T_{{\rm c}}$, and
crucially detect a sharp, robust, field-invariant peak at the stripe charge
order temperature, $T_{{\rm {\scriptscriptstyle CO}}}$. Our observations
suggest the onset of a nontrivial charge ordered phase at $T_{{\rm
{\scriptscriptstyle CO}}}$, and the subsequent presence of spontaneously
generated vortices over a broad temperature range before the emergence of bulk
superconductivity in LBCO

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