Zobrazeno 1 - 10
of 109
pro vyhledávání: '"Johnston, David C."'
Autor:
Kundu, Asish K., Huang, Xiong, Seewald, Eric, Ritz, Ethan, Pakhira, Santanu, Zhang, Shuai, Sun, Dihao, Turkel, Simon, Shabani, Sara, Yilmaz, Turgut, Vescovo, Elio, Dean, Cory R., Johnston, David C., Valla, Tonica, Birol, Turan, Basov, Dmitri N., Fernandes, Rafael M., Pasupathy, Abhay N.
Publikováno v:
Nat. Commun. 15, 5008 (2024)
Kagome vanadates {\it A}V$_3$Sb$_5$ display unusual low-temperature electronic properties including charge density waves (CDW), whose microscopic origin remains unsettled. Recently, CDW order has been discovered in a new material ScV$_6$Sn$_6$, provi
Externí odkaz:
http://arxiv.org/abs/2406.11212
Autor:
Islam, Farhan, Schlagel, Deborah, Lee, Yongbin, Pakhira, Santanu, Pajerowski, Daniel M., Johnston, David C., Ke, Liqin, Vaknin, David, McQueeney, Robert J.
The addition of magnetic impurities in topological insulators can drive ferromagnetic order that leads to novel quantum anomalous Hall transport well below the Curie temperature. The fragility of the quantized regime has been ascribed to the random n
Externí odkaz:
http://arxiv.org/abs/2402.01531
Autor:
Pakhira, Santanu, Johnston, David C.
The body-centered-tetragonal antiferromagnet EuGa$_4$ exhibits A-type antiferromagnetic order below its N\'eel temperature $T_{\rm N} = 16.4$ K in magnetic field $H = 0$ where the moments are ferromagnetically aligned in the $ab$-plane with the Eu mo
Externí odkaz:
http://arxiv.org/abs/2303.10673
Autor:
Islam, Farhan, Trevisan, Thaís V., Heitmann, Thomas, Pakhira, Santanu, Riberolles, Simon X. M., Sangeetha, N. S., Johnston, David C., Orth, Peter P., Vaknin, David
Publikováno v:
Phys. Rev. B 107, 054425 (2023); 14 pages
We report neutron-diffraction results on single-crystal CaMn$_2$P$_2$ containing corrugated Mn honeycomb layers and determine its ground-state magnetic structure. The diffraction patterns consist of prominent (1/6, 1/6, $L$) reciprocal lattice unit (
Externí odkaz:
http://arxiv.org/abs/2205.04492
Autor:
Johnston, David C.
The thermodynamic properties of a nonrelativistic free-electron Fermi gas is of fundamental interest in condensed matter physics. Properties previously studied in three-dimensions (3D) in the low- and high-temperature limits include the internal ener
Externí odkaz:
http://arxiv.org/abs/2012.07663
Autor:
Johnston, David C.
Publikováno v:
J. Magn. Magn. Mater. 535, 168062 (2021)
A recently-developed molecular field theory (MFT) has been used to fit single-crystal magnetic susceptibility chi versus temperature T data below the respective antiferromagnetic ordering temperatures TN for a variety of collinear and coplanar noncol
Externí odkaz:
http://arxiv.org/abs/2005.09636
Autor:
Johnston, David C.
Publikováno v:
Am. J. Phys. 88, 1109 (2020); 14 pages
A prototypical model of a one-dimensional metallic monatomic solid containing noninteracting electrons is studied, where the argument of the cosine potential energy periodic with the lattice contains the first reciprocal lattice vector G1 = 2pi/a, wh
Externí odkaz:
http://arxiv.org/abs/2003.06647
Autor:
Johnston, David C.
The repulsive-potential Kronig-Penney (KP) model for a one-dimensional band structure is well known. However, real metals contain positively-charged ions resulting in attractive potential wells seen by the metallic electrons. Here we consider the lat
Externí odkaz:
http://arxiv.org/abs/1905.12084
Publikováno v:
Inorg. Chem. 57, 3206 (2018)
We report the synthesis and properties of a new layered tetragonal ternary compound CsMn$_4$As$_3$ (structure: KCu$_4$S$_3$-type, space group: $P4/mmm$, No. 123 and $Z = 2$). The material is a small band-gap semiconductor and exhibits an antiferromag
Externí odkaz:
http://arxiv.org/abs/1904.04598