scholarly journals Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements

2018 ◽  
Vol 5 (4) ◽  
pp. 1700856 ◽  
Author(s):  
Artur Glavic ◽  
Brock Summers ◽  
Ashutosh Dahal ◽  
Joseph Kline ◽  
Walter Van Herck ◽  
...  
Keyword(s):  
Magnetic Charge ◽  
Honeycomb Lattice ◽  
Ordered State

scholarly journals Novel Magnetic Phases: Spin Solid versus Magnetic Charge Ordered State in Artificial Honeycomb Lattice of Connected Elements (Adv. Sci. 4/2018)

2018 ◽  
Vol 5 (4) ◽  
pp. 1870024 ◽  
Author(s):  
Artur Glavic ◽  
Brock Summers ◽  
Ashutosh Dahal ◽  
Joseph Kline ◽  
Walter Van Herck ◽  
...  
Keyword(s):  
Magnetic Charge ◽  
Honeycomb Lattice ◽  
Magnetic Phases ◽  
Ordered State

Emergent properties in the artificial magnetic honeycomb lattice of ultra-small elements

2018 ◽  
Author(s):  
◽  
Brock 07s
Keyword(s):  
Solid State ◽  
Neutron Scattering ◽  
Lower Energy ◽  
Magnetic Charge ◽  
Emergent Properties ◽  
Honeycomb Lattice ◽  
Differential Conductivity ◽  
Vortex Loops ◽  
State Configuration ◽  
Opposite Chirality

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The artificial magnetic honeycomb lattice is expected to manifest a broad and tunable range of novel magnetic phenomena associated with the geometric frustration at the magnetic bar vertices. The theoretically predicted phase diagram of the magnetic honeycomb lattice has four unique magnetic vertex configurations, completely dependent on temperature. The system will transition from a paramagnetic gas state to a spin ice state to a magnetic charge-ordered state, manifested as pairs of vortex loops with opposite chirality, as the temperature of the system is reduced. At low enough temperature, the magnetic correlation is expected to develop into the spin solid state configuration with net zero entropy density and magnetization, with an lternating distribution of magnetic vortex loops of opposite chirality repeating across the lattice. Current efforts to experimentally access the lower energy phases have been unsuccessful due to the huge inter-elemental energy between the large ([about]1 m long) bars produced using lithography. For the first time, we have fabricated macroscopicsized samples of permalloy (N[subscript i 0.8]F[subscript e 0.2]) or tin-neodymium (SnNd) honeycomb lattices with ultra-small, connected bar elements by utilizing the self-assembly properties of the diblock copolymer PS-b-P4VP for the template. This new technique produces bar elements of [approximanetly equal to] 12-18 nm in length, reducing the inter-elemental energy by several orders of magnitude (from [approximanetly equal to] 10[subscript 4] K to [approximanetly equal to]12 K), allowing our system to access the lower energy states. We have performed detailed magnetic, electrical, and neutron scattering experiments to observe these predicted phase transitions in our connected honeycomb lattice of permalloy. Numerical modeling of the polarized neutron reectometry measurements, omplimented by the results from micromagnetic simulations and magnetic measurements, provided detailed information on the temperature dependent evolution of spin correlation in the system. We found that our magnetic honeycomb lattice tends to develop the spin solid state configuration for very low temperatures. Small-angle neutron scattering results indicate that the system manifests a non-unique magnetic state, showing a coexistence of both the long-range ordered and the short-range magnetic charge ordered states at an intermediate temperature of T [approximanetly equal to] 175 K, contrary to the previous theoretical reports. Electrical measurements on the magnetic honeycomb have led to a patent for a new magnetic, diode-type electronic device that exhibits strong unidirectional electrical transport behavior characterized by an asymmetric colossal enhancement in differential conductivity. Experimental observations from the Nd-based antiferromagnetic artificial honeycomb lattice presented evidences to the development of an unconventional solid state described by interpenetrating Wigner crystals of magnetic charges. The SnNd honeycomb system produces highly unusual diamagnetic behavior and a magnetic field induced two-step switching in differential conductivity as a function of current bias.

scholarly journals Competing states in the SU(3) Heisenberg model on the honeycomb lattice: Plaquette valence-bond crystal versus dimerized color-ordered state

2013 ◽  
Vol 87 (19) ◽  
Author(s):  
Philippe Corboz ◽  
Miklós Lajkó ◽  
Karlo Penc ◽  
Frédéric Mila ◽  
Andreas M. Läuchli
Keyword(s):  
Heisenberg Model ◽  
Valence Bond ◽  
Honeycomb Lattice ◽  
Ordered State

scholarly journals Magnetic charge and geometry confluence for ultra-low forward voltage diode in artificial honeycomb lattice

2021 ◽  
pp. 100574
Author(s):  
George Yumnam ◽  
Jiasen Guo ◽  
Yiyao Chen ◽  
Ashutosh Dahal ◽  
Poushali Ghosh ◽  
...  
Keyword(s):  
Magnetic Charge ◽  
Honeycomb Lattice ◽  
Forward Voltage

PRESSURE DEPENDENCE OF PHONON LINESHAPES OF SOLlD DEUTERIUM IN THE ORDERED STATE

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-97-C6-98
Author(s):  
R. Jochemsen ◽  
V. V. Goldman ◽  
Isaac F. Silvera
Keyword(s):  
Pressure Dependence ◽  
Ordered State

2D Honeycomb Silicon: A Review on Theoretical Advances for Silicene Field-Effect Transistors

2020 ◽  
Vol 16 (4) ◽  
pp. 595-607 ◽  
Author(s):  
Mu Wen Chuan ◽  
Kien Liong Wong ◽  
Afiq Hamzah ◽  
Shahrizal Rusli ◽  
Nurul Ezaila Alias ◽  
...  
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Semiconductor Industry ◽  
Honeycomb Lattice ◽  
Theoretical Studies ◽  
Fabrication Technology ◽  
Dirac Cone ◽  
Free Standing ◽  
Silicene Nanoribbons ◽  
Effect Transistor

Catalysed by the success of mechanical exfoliated free-standing graphene, two dimensional (2D) semiconductor materials are successively an active area of research. Silicene is a monolayer of silicon (Si) atoms with a low-buckled honeycomb lattice possessing a Dirac cone and massless fermions in the band structure. Another advantage of silicene is its compatibility with the Silicon wafer fabrication technology. To effectively apply this 2D material in the semiconductor industry, it is important to carry out theoretical studies before proceeding to the next step. In this paper, an overview of silicene and silicene nanoribbons (SiNRs) is described. After that, the theoretical studies to engineer the bandgap of silicene are reviewed. Recent theoretical advancement on the applications of silicene for various field-effect transistor (FET) structures is also discussed. Theoretical studies of silicene have shown promising results for their application as FETs and the efforts to study the performance of bandgap-engineered silicene FET should continue to improve the device performance.

Strong Coupling of Electron and Nuclear Spins: Outlook and Prospects

2018 ◽  
Author(s):  
M. M. Glazov
Keyword(s):  
Energy Spectrum ◽  
Charge Carrier ◽  
Strong Coupling ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Spin Polaron ◽  
Nuclear Spins ◽  
Deep Impurity ◽  
Impurity Centers ◽  
Ordered State

In this chapter, some prospects in the field of electron and nuclear spin dynamics are outlined. Particular emphasis is put ona situation where the hyperfine interaction is so strong that it leads to a qualitative rearrangement of the energy spectrum resulting in the coherent excitation transfer between the electron and nucleus. The strong coupling between the spin of the charge carrier and of the nucleus is realized, for example in the case of deep impurity centers in semiconductors or in isotopically purified systems. We also discuss the effect of the nuclear spin polaron, that is ordered state, formation at low enough temperatures of nuclear spins, where the orientation of the carrier spin results in alignment of the spins of nucleus interacting with the electron or hole.

Effects of non-axial electric field gradients on the ferromagnetic state of amorphous rare-earth alloys

1980 ◽  
Vol 58 (5) ◽  
pp. 629-632 ◽  
Author(s):  
H. Hernandez ◽  
R. Ferrer ◽  
M. J. Zuckermann
Keyword(s):  
Rare Earth ◽  
Electric Field ◽  
Ferromagnetic State ◽  
Rare Earth Alloys ◽  
Electric Field Gradients ◽  
Axial Electric Field ◽  
Ferromagnetic Alloys ◽  
Field Gradients ◽  
Ordered State

We discuss the influence of non-axial electric field gradients on the ordered state of amorphous ferromagnetic alloys containing rare-earth atoms.

Sign in / Sign up

Export Citation Format

Share Document